TY - JOUR
T1 - Volume-based 18F-FDG PET analysis of cardiac sarcoidosis using the descending aorta as a reference tissue
AU - Tsujimoto, Masakazu
AU - Fukushima, Ayami
AU - Kawai, Hideki
AU - Watanabe, Masanori
AU - Tanahashi, Shingo
AU - Sarai, Masayoshi
AU - Toyama, Hiroshi
N1 - Publisher Copyright:
© 2023 Lippincott Williams and Wilkins. All rights reserved.
PY - 2023/5/1
Y1 - 2023/5/1
N2 - Objective 18F-FDG PET can be used to calculate the threshold value of myocardial volume based on the mean standardised uptake value (SUVmean) of the aorta to detect highly integrated regions of cardiac sarcoidosis. The present study investigated the myocardial volume when the position and number of volumes of interest (VOIs) were changed in the aorta. Methods The present study examined PET/computed tomography images of 47 consecutive cardiac sarcoidosis cases. VOIs were set at three locations in the myocardium and aorta (descending thoracic aorta, superior hepatic margin and near the pre-branch of the common iliac artery). The volume was calculated for each threshold using 1.1-1.5 times the SUVmean(median of three cross-sections) of the aorta as the threshold to detect high myocardial 18F-FDG accumulation. The detected volume, correlation coefficient with the visually manually measured volume and the relative error were also calculated. Results The optimum threshold value for detecting high 18F-FDG accumulation was 1.4 times that of the single cross-section of the aorta and showed the smallest relative errors of 33.84% and 25.14% and correlation coefficients of 0.974 and 0.987 for single and three cross-sections, respectively. Conclusion The SUVmeanof the descending aorta may be detected in good agreement with the visual high accumulation by multiplying the same threshold constant for both single and multiple cross-sections.
AB - Objective 18F-FDG PET can be used to calculate the threshold value of myocardial volume based on the mean standardised uptake value (SUVmean) of the aorta to detect highly integrated regions of cardiac sarcoidosis. The present study investigated the myocardial volume when the position and number of volumes of interest (VOIs) were changed in the aorta. Methods The present study examined PET/computed tomography images of 47 consecutive cardiac sarcoidosis cases. VOIs were set at three locations in the myocardium and aorta (descending thoracic aorta, superior hepatic margin and near the pre-branch of the common iliac artery). The volume was calculated for each threshold using 1.1-1.5 times the SUVmean(median of three cross-sections) of the aorta as the threshold to detect high myocardial 18F-FDG accumulation. The detected volume, correlation coefficient with the visually manually measured volume and the relative error were also calculated. Results The optimum threshold value for detecting high 18F-FDG accumulation was 1.4 times that of the single cross-section of the aorta and showed the smallest relative errors of 33.84% and 25.14% and correlation coefficients of 0.974 and 0.987 for single and three cross-sections, respectively. Conclusion The SUVmeanof the descending aorta may be detected in good agreement with the visual high accumulation by multiplying the same threshold constant for both single and multiple cross-sections.
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U2 - 10.1097/MNM.0000000000001680
DO - 10.1097/MNM.0000000000001680
M3 - Article
C2 - 36862425
AN - SCOPUS:85152169401
SN - 0143-3636
VL - 44
SP - 390
EP - 396
JO - Nuclear medicine communications
JF - Nuclear medicine communications
IS - 5
ER -