Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts
Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evalua...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Tomita, Yoya [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Annals of nuclear medicine - [S.l.] : Springer Japan, 1987, 36(2022), 8 vom: 28. Mai, Seite 736-745 |
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| Übergeordnetes Werk: |
volume:36 ; year:2022 ; number:8 ; day:28 ; month:05 ; pages:736-745 |
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| DOI / URN: |
10.1007/s12149-022-01756-2 |
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| Katalog-ID: |
SPR047653809 |
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| 100 | 1 | |a Tomita, Yoya |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts |
| 264 | 1 | |c 2022 | |
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| 500 | |a © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 | ||
| 520 | |a Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. | ||
| 650 | 4 | |a Positron emission tomography |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Shine-though artifact |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Urinary bladder |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Radioactivity |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Time-of-flight |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Ichikawa, Yasutaka |0 (orcid)0000-0002-6383-207X |4 aut | |
| 700 | 1 | |a Sakuma, Hajime |4 aut | |
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10.1007/s12149-022-01756-2 doi (DE-627)SPR047653809 (SPR)s12149-022-01756-2-e DE-627 ger DE-627 rakwb eng Tomita, Yoya verfasserin aut Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. Positron emission tomography (dpeaa)DE-He213 Shine-though artifact (dpeaa)DE-He213 Urinary bladder (dpeaa)DE-He213 Radioactivity (dpeaa)DE-He213 Time-of-flight (dpeaa)DE-He213 Ichikawa, Yasutaka (orcid)0000-0002-6383-207X aut Sakuma, Hajime aut Enthalten in Annals of nuclear medicine [S.l.] : Springer Japan, 1987 36(2022), 8 vom: 28. Mai, Seite 736-745 (DE-627)325789339 (DE-600)2039738-0 1864-6433 nnns volume:36 year:2022 number:8 day:28 month:05 pages:736-745 https://dx.doi.org/10.1007/s12149-022-01756-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 36 2022 8 28 05 736-745 |
| spelling |
10.1007/s12149-022-01756-2 doi (DE-627)SPR047653809 (SPR)s12149-022-01756-2-e DE-627 ger DE-627 rakwb eng Tomita, Yoya verfasserin aut Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. Positron emission tomography (dpeaa)DE-He213 Shine-though artifact (dpeaa)DE-He213 Urinary bladder (dpeaa)DE-He213 Radioactivity (dpeaa)DE-He213 Time-of-flight (dpeaa)DE-He213 Ichikawa, Yasutaka (orcid)0000-0002-6383-207X aut Sakuma, Hajime aut Enthalten in Annals of nuclear medicine [S.l.] : Springer Japan, 1987 36(2022), 8 vom: 28. Mai, Seite 736-745 (DE-627)325789339 (DE-600)2039738-0 1864-6433 nnns volume:36 year:2022 number:8 day:28 month:05 pages:736-745 https://dx.doi.org/10.1007/s12149-022-01756-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 36 2022 8 28 05 736-745 |
| allfields_unstemmed |
10.1007/s12149-022-01756-2 doi (DE-627)SPR047653809 (SPR)s12149-022-01756-2-e DE-627 ger DE-627 rakwb eng Tomita, Yoya verfasserin aut Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. Positron emission tomography (dpeaa)DE-He213 Shine-though artifact (dpeaa)DE-He213 Urinary bladder (dpeaa)DE-He213 Radioactivity (dpeaa)DE-He213 Time-of-flight (dpeaa)DE-He213 Ichikawa, Yasutaka (orcid)0000-0002-6383-207X aut Sakuma, Hajime aut Enthalten in Annals of nuclear medicine [S.l.] : Springer Japan, 1987 36(2022), 8 vom: 28. Mai, Seite 736-745 (DE-627)325789339 (DE-600)2039738-0 1864-6433 nnns volume:36 year:2022 number:8 day:28 month:05 pages:736-745 https://dx.doi.org/10.1007/s12149-022-01756-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 36 2022 8 28 05 736-745 |
| allfieldsGer |
10.1007/s12149-022-01756-2 doi (DE-627)SPR047653809 (SPR)s12149-022-01756-2-e DE-627 ger DE-627 rakwb eng Tomita, Yoya verfasserin aut Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. Positron emission tomography (dpeaa)DE-He213 Shine-though artifact (dpeaa)DE-He213 Urinary bladder (dpeaa)DE-He213 Radioactivity (dpeaa)DE-He213 Time-of-flight (dpeaa)DE-He213 Ichikawa, Yasutaka (orcid)0000-0002-6383-207X aut Sakuma, Hajime aut Enthalten in Annals of nuclear medicine [S.l.] : Springer Japan, 1987 36(2022), 8 vom: 28. Mai, Seite 736-745 (DE-627)325789339 (DE-600)2039738-0 1864-6433 nnns volume:36 year:2022 number:8 day:28 month:05 pages:736-745 https://dx.doi.org/10.1007/s12149-022-01756-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 36 2022 8 28 05 736-745 |
| allfieldsSound |
10.1007/s12149-022-01756-2 doi (DE-627)SPR047653809 (SPR)s12149-022-01756-2-e DE-627 ger DE-627 rakwb eng Tomita, Yoya verfasserin aut Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. Positron emission tomography (dpeaa)DE-He213 Shine-though artifact (dpeaa)DE-He213 Urinary bladder (dpeaa)DE-He213 Radioactivity (dpeaa)DE-He213 Time-of-flight (dpeaa)DE-He213 Ichikawa, Yasutaka (orcid)0000-0002-6383-207X aut Sakuma, Hajime aut Enthalten in Annals of nuclear medicine [S.l.] : Springer Japan, 1987 36(2022), 8 vom: 28. Mai, Seite 736-745 (DE-627)325789339 (DE-600)2039738-0 1864-6433 nnns volume:36 year:2022 number:8 day:28 month:05 pages:736-745 https://dx.doi.org/10.1007/s12149-022-01756-2 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 36 2022 8 28 05 736-745 |
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English |
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Enthalten in Annals of nuclear medicine 36(2022), 8 vom: 28. Mai, Seite 736-745 volume:36 year:2022 number:8 day:28 month:05 pages:736-745 |
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Enthalten in Annals of nuclear medicine 36(2022), 8 vom: 28. Mai, Seite 736-745 volume:36 year:2022 number:8 day:28 month:05 pages:736-745 |
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Positron emission tomography Shine-though artifact Urinary bladder Radioactivity Time-of-flight |
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Tomita, Yoya @@aut@@ Ichikawa, Yasutaka @@aut@@ Sakuma, Hajime @@aut@@ |
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2022-05-28T00:00:00Z |
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This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. 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Tomita, Yoya |
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Tomita, Yoya misc Positron emission tomography misc Shine-though artifact misc Urinary bladder misc Radioactivity misc Time-of-flight Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts |
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Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts Positron emission tomography (dpeaa)DE-He213 Shine-though artifact (dpeaa)DE-He213 Urinary bladder (dpeaa)DE-He213 Radioactivity (dpeaa)DE-He213 Time-of-flight (dpeaa)DE-He213 |
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misc Positron emission tomography misc Shine-though artifact misc Urinary bladder misc Radioactivity misc Time-of-flight |
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Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts |
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Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts |
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shine-through artifact due to high-radioactivity bladder and bowel gas in 18f-fdg pet/ct: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts |
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Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts |
| abstract |
Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 |
| abstractGer |
Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 |
| abstract_unstemmed |
Objective Shine-though artifact can appear as regions with falsely increased uptake in the immediate vicinity of large hot sources in 18F-FDG PET/CT. This artifact may adversely affect the assessment of tumor involvement in the regions adjacent to the bladder. The purpose of this study was to evaluate the prevalence of shine-through artifacts in clinical 18F-FDG PET/CT examinations and the factors that can influence their occurrence and extent. Methods PET/CT images were acquired with Discovery PET/CT 690. One hundred six patients who underwent 18F-FDG PET/CT for clinical purposes were retrospectively reviewed. PET images were reconstructed using 3-dimensional ordered-subset expectation maximization with and without time-of-flight (TOF). The shine-through artifact was defined as an erroneous accumulation of 18F-FDG between the bladder and the air region in the intestine without attenuation correction (AC) errors. The maximum standardized uptake value ($ SUV_{max} $) of the artifact was measured, and the effect of TOF on this artifact was evaluated. The $ SUV_{max} $ in the bladder was compared in patients with and without the artifacts. A phantom containing two spheres simulating bladder and rectal gas was imaged while changing the radioactivity of 18F-FDG solution in the bladder sphere. The relationship between the bladder sphere radioactivity and the $ SUV_{max} $ of the shine-through artifacts was evaluated. Results The shine-through artifact was more frequently observed on PET images reconstructed without TOF (12/106, 11.3%) as compared to PET images with TOF (8/106, 7.5%, p = 0.046). The $ SUV_{max} $ of the shine-through artifacts was significantly decreased by TOF reconstruction compared to non-TOF reconstruction (4.7 ± 1.7 vs 7.6 ± 3.1, p = 0.0078). The mean $ SUV_{max} $ of urinary bladders in patients with the artifacts was significantly higher than those without the artifacts on non-TOF images (74.9 ± 61.1 vs 46.3 ± 35.2, p = 0.038). In the phantom study, the $ SUV_{max} $ of the shine-through artifact increased as the radioactivity in the bladder-simulating sphere increased. Conclusion Shine-through artifacts were observed in approximately 10% of clinical 18F-FDG PET/CT examinations. Their magnitude is significantly associated with the radioactivity in the bladder and can be reduced by employing TOF. Recognizing this artifact allows for a more accurate interpretation of 18F-FDG pelvic studies. © The Author(s) under exclusive licence to The Japanese Society of Nuclear Medicine 2022 |
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| title_short |
Shine-through artifact due to high-radioactivity bladder and bowel gas in 18F-FDG PET/CT: impact of time-of-flight algorithm and radioactivity concentration of urine in the bladder on the occurrence of the artifacts |
| url |
https://dx.doi.org/10.1007/s12149-022-01756-2 |
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Ichikawa, Yasutaka Sakuma, Hajime |
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10.1007/s12149-022-01756-2 |
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2024-07-03T14:07:43.263Z |
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| score |
7.399624 |