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. 2022 Feb 3;9:817911. doi: 10.3389/fcvm.2022.817911

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Copyright © 2022 Lyu, Pan, Li, Li, Yang, Dong, Guo, Lin, Han, Liang, Sun, Yu, Zhang and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Case example of CCTA and hyperemic MBF distribution in a healthy participant. A 29-year-old male healthy volunteer. (A–C) Resting CCTA shows no calcified plaque or stenosis in the coronary arteries. (D–I) Stress CT-MPI during adenosine infusion showed normal myocardial perfusion, as shown by relatively homogeneous color-coded images in the bull's eye diagram (D) and left ventricular long-axis view (E) and short-axis views (F–I). (D–F) The green arrow shows that the hyperemic MBF of basal-septum was lower than that of other segments. (F,G) ROI was manually placed in each myocardial segment as large as possible, excluding a 1 mm endocardial and epicardial borders to avoid image artifacts. CCTA, coronary computed tomography angiography; CT-MPI, computed tomography myocardial perfusion imaging; MBF, myocardial blood flow; ROI, Region of interest.