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This study aimed to evaluate the diagnostic performance of coronary flow reserve (CFR), hyperemic myocardial blood flow (hMBF), and CFR ratio for detecting significant coronary artery disease (CAD) on 13 N-ammonia positron emission tomography (PET). Methods and Results: We analyzed 63 patients (mean age, 71±9 years; 43 males) with suspected CAD who underwent both pharmacological stress/rest 13 N-ammonia PET and coronary angiography. CFR and hMBF for PET were calculated automatically usingdoi:10.1253/circj.cj-17-0745 pmid:28954967 fatcat:zkqjrbyct5cippr4bndvkelfqi