Retrospective Study of Arterial Stenosis Diagnosis

This retrospective study was approved by Gifu University Institutional Review Board. The requirement of informed consent was waived due to the retrospective nature of the study. A series of 306 consecutive participants who underwent DTARG at our institution from January 2016 to December 2020 was included in the subsequent analysis. Overall, 12 of the 306 participants were excluded because they were under 20 years of age. The remaining 294 participants (mean age, 66 ± 15 years; age range, 20–89 years; 195 men; mean body weight, 61 ± 11 kg; body weight range, 37–106 kg) were included in this study (Fig 1). Of these 294 participants, one had normal blood flow, and 293 had abnormal blood flow in DTARG, diagnosed by one radiologist (____with 7 years of post-training experience in nuclear medicine). Furthermore, 176 participants had internal carotid artery stenosis or occlusion (right, 82; left, 54; bilateral, 40), 50 had middle cerebral artery stenosis or occlusion (right, 17; left, 30; bilateral, three), 39 participants had moyamoya disease, seven had vertebral artery stenosis or occlusion (right, three; left, two; bilateral, two), three had basilar artery stenosis, two had subclavian artery stenosis (right, one; bilateral, one), one had bilateral common carotid artery stenosis, one had dual arteriovenous fistula, and 15 participants had multiple cervical and/or intracranial arterial stenosis or occlusion. Of the 294 participants, 54 were examined after treatment for cerebral circulation.