Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging
Amyloid positron emission tomography (PET) imaging with florbetapir 18F (18F-AV-45) allows in vivo assessment of cerebral amyloid load and can be used in the evaluation of progression of Alzheimer's disease (AD) and other dementias associated with b-amyloid. However, cortical amyloid deposition...
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Thieme Medical and Scientific Publishers Pvt. Ltd.
2018-01-01
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| Series: | World Journal of Nuclear Medicine |
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| Online Access: | http://www.thieme-connect.de/DOI/DOI?10.4103/wjnm.WJNM_5_17 |
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| author | Karin Knesaurek Geoffrey Warnock Lale Kostakoglu Cyrill Burger |
| author_facet | Karin Knesaurek Geoffrey Warnock Lale Kostakoglu Cyrill Burger |
| author_sort | Karin Knesaurek |
| collection | DOAJ |
| description | Amyloid positron emission tomography (PET) imaging with florbetapir 18F (18F-AV-45) allows in vivo assessment of cerebral amyloid load and can be used in the evaluation of progression of Alzheimer's disease (AD) and other dementias associated with b-amyloid. However, cortical amyloid deposition can occur in healthy cases, as well as in patients with AD and quantification of cortical amyloid burden can improve the 18F-AV-45 PET imaging evaluations. The quantification is mostly performed by cortical-to-cerebellum standardized uptake value ratio (SUVr). The aim of our study was to compare two methods for SUVr calculations in amyloid florbetapir 18F PET brain imaging. In amyloid florbetapir 18F PET brain imaging study, we imaged 42 cases with the mean age of 72.6 ± 9.9 (mean ± standard deviation). They were imaged on different PET/computed tomography systems with 369.0 ± 34.2 kBq of 18F florbetapir. Data were reconstructed using the vendor's reconstruction software. Corresponding magnetic resonance imaging (MRI) data were retrieved, and matched PET and MRI data were transferred to a common platform. Two methods were used for the calculation of the ratio of cortical-to-cerebellar signal (SUVr). One method was based on the MIM Software Inc., Version 6.4 software and only uses PET data. The second approach used the PMOD Neuro tool (version 3.5). This approach utilizes PET and corresponding MRI data (preferably T1-weighted) for better brain segmentation. For all the 42 cases, the average SUVr values for MIM and PMOD applications were 1.24 ± 0.26 and 1.22 ± 0.25, respectively, with a mean difference of 0.02 ± 0.15. The repeatability coefficient was 0.15 (12.3% of the mean). The Spearman's rank correlation coefficient was very high, r = 0.96. For amyloid-negative cases, the average SUVr values were lower than all group SUVr average values, 0.96 ± 0.07 and 1.00 ± 0.09, for MIM and PMOD applications, respectively. A mean difference was 0.04 ± 0.12, the repeatability coefficient was 0.12 (12.9% of the mean) and the Spearman's rank correlation coefficient was modest, r = 0.55. For amyloid-positive patients, the average SUVr values were higher than the same all grouP values, 1.34 ± 0.16 and 1.35 ± 0.20, respectively, with a mean difference of 0.01 ± 0.16. The repeatability coefficient was 0.16 (11.9% of the mean). The Spearman's rank correlation coefficient was high, r = 0.93. Our results indicated that the SUVr values derived using MIM and PMOD Neuro are effectively interchangeable and well correlated. However, PET template-based quantification (MIM approach) is clinically friendlier and easier to use. MRI template-based quantification (PMOD Neuro) better delineates different regions of the brain, can be used with any tracer, and therefore is more suitable for research. |
| format | Article |
| id | doaj-art-af666df1827a45748441e6a9f0ddd5a8 |
| institution | Kabale University |
| issn | 1450-1147 1607-3312 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Thieme Medical and Scientific Publishers Pvt. Ltd. |
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| series | World Journal of Nuclear Medicine |
| spelling | doaj-art-af666df1827a45748441e6a9f0ddd5a82025-08-20T03:48:36ZengThieme Medical and Scientific Publishers Pvt. Ltd.World Journal of Nuclear Medicine1450-11471607-33122018-01-011701212610.4103/wjnm.WJNM_5_17Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imagingKarin Knesaurek0Geoffrey Warnock1Lale Kostakoglu2Cyrill Burger3Department of Radiology, Division of Nuclear Medicine, Icahn School of Medicine at Mount Sinai, New York, USADepartment of Nuclear Medicine, University Hospital Zurich, Zurich, SwitzerlandDepartment of Radiology, Division of Nuclear Medicine, Icahn School of Medicine at Mount Sinai, New York, USAPMOD Technologies LLC, Zurich, SwitzerlandAmyloid positron emission tomography (PET) imaging with florbetapir 18F (18F-AV-45) allows in vivo assessment of cerebral amyloid load and can be used in the evaluation of progression of Alzheimer's disease (AD) and other dementias associated with b-amyloid. However, cortical amyloid deposition can occur in healthy cases, as well as in patients with AD and quantification of cortical amyloid burden can improve the 18F-AV-45 PET imaging evaluations. The quantification is mostly performed by cortical-to-cerebellum standardized uptake value ratio (SUVr). The aim of our study was to compare two methods for SUVr calculations in amyloid florbetapir 18F PET brain imaging. In amyloid florbetapir 18F PET brain imaging study, we imaged 42 cases with the mean age of 72.6 ± 9.9 (mean ± standard deviation). They were imaged on different PET/computed tomography systems with 369.0 ± 34.2 kBq of 18F florbetapir. Data were reconstructed using the vendor's reconstruction software. Corresponding magnetic resonance imaging (MRI) data were retrieved, and matched PET and MRI data were transferred to a common platform. Two methods were used for the calculation of the ratio of cortical-to-cerebellar signal (SUVr). One method was based on the MIM Software Inc., Version 6.4 software and only uses PET data. The second approach used the PMOD Neuro tool (version 3.5). This approach utilizes PET and corresponding MRI data (preferably T1-weighted) for better brain segmentation. For all the 42 cases, the average SUVr values for MIM and PMOD applications were 1.24 ± 0.26 and 1.22 ± 0.25, respectively, with a mean difference of 0.02 ± 0.15. The repeatability coefficient was 0.15 (12.3% of the mean). The Spearman's rank correlation coefficient was very high, r = 0.96. For amyloid-negative cases, the average SUVr values were lower than all group SUVr average values, 0.96 ± 0.07 and 1.00 ± 0.09, for MIM and PMOD applications, respectively. A mean difference was 0.04 ± 0.12, the repeatability coefficient was 0.12 (12.9% of the mean) and the Spearman's rank correlation coefficient was modest, r = 0.55. For amyloid-positive patients, the average SUVr values were higher than the same all grouP values, 1.34 ± 0.16 and 1.35 ± 0.20, respectively, with a mean difference of 0.01 ± 0.16. The repeatability coefficient was 0.16 (11.9% of the mean). The Spearman's rank correlation coefficient was high, r = 0.93. Our results indicated that the SUVr values derived using MIM and PMOD Neuro are effectively interchangeable and well correlated. However, PET template-based quantification (MIM approach) is clinically friendlier and easier to use. MRI template-based quantification (PMOD Neuro) better delineates different regions of the brain, can be used with any tracer, and therefore is more suitable for research.http://www.thieme-connect.de/DOI/DOI?10.4103/wjnm.WJNM_5_17alzheimer's diseaseflorbetapirpositron emission tomography amyloid imaging |
| spellingShingle | Karin Knesaurek Geoffrey Warnock Lale Kostakoglu Cyrill Burger Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging World Journal of Nuclear Medicine alzheimer's disease florbetapir positron emission tomography amyloid imaging |
| title | Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging |
| title_full | Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging |
| title_fullStr | Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging |
| title_full_unstemmed | Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging |
| title_short | Comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging |
| title_sort | comparison of standardized uptake value ratio calculations in amyloid positron emission tomography brain imaging |
| topic | alzheimer's disease florbetapir positron emission tomography amyloid imaging |
| url | http://www.thieme-connect.de/DOI/DOI?10.4103/wjnm.WJNM_5_17 |
| work_keys_str_mv | AT karinknesaurek comparisonofstandardizeduptakevalueratiocalculationsinamyloidpositronemissiontomographybrainimaging AT geoffreywarnock comparisonofstandardizeduptakevalueratiocalculationsinamyloidpositronemissiontomographybrainimaging AT lalekostakoglu comparisonofstandardizeduptakevalueratiocalculationsinamyloidpositronemissiontomographybrainimaging AT cyrillburger comparisonofstandardizeduptakevalueratiocalculationsinamyloidpositronemissiontomographybrainimaging |