To understand basic facts and technological advancements of the latest ultra-high-resolution CT (UHRCT). To learn improved demonstration of cortical branches and critical perforating arteries by brain CT angiography (CTA) using UHRCT. To know basic anatomy and clinical significance of the perforating arteries as demonstrated using UHRCT.

Although precise depiction of the perforating arteries is required in making strategies for direct surgery and stroke management, capability of conventional CT has been limited due to limited spatial resolution.The latest ultra-high-resolution CT (UHRCT) scanner (Aquilion Precision™; Toshiba Medical Systems, Tokyo, Japan) provides slice collimation of 0.25 mm x 160 and matrix size of 1024 x 1024 or 2048 x 2048. Major features of this CT scanner include an improved detector system (the minimal slice thickness, 0.25 mm; the maximal channel number, 1792) and a...

We will illustrate anatomical and clinical significances of cortical branches and critical perforating arteries including the internal carotid artery (ICA), ophthalmic artery (OA), vertebral artery (VA), basilar artery (BA), anterior cerebral artery (ACA), middle cerebral artery (MCA), and posterior cerebral artery as listed in Fig. 4 depicted by UHRCT. Imaging Acquisition CT scanner; Aquilion Precision™; Toshiba Medical Systems, Tokyo, Japan Scan parameters and image reconstruction; We present scan and image reconstruction parameters in Table 1. Injection method; We place a 20-G needle in the right...

It has become possible to readily demonstrate not only cortical branches but also perforating branches of the major cerebral arteries by CTA using UHRCT as shown in this exhibit. However, this demonstration is generally difficult even with UHRCT, because these perforating branches are very small and their delineation is often obscured by surrounding image noise and spatial overlap by adjacent vessels. Thus, it is critical for radiologists and radiology technicians to fully understand the anatomy and clinical significance of the perforating branches for providing clinically...

Miho Gomyo1), Kazuhiro Tsuchiya2), Haruhiko Machida1), Shichiro Katase1), Masamichi Koyanagi1), Arisa Ohara1), Hisae Shiga1), Kenichi Yokoyama1) 1) Department of Radiology, Kyorin University Faculty of Medicine, Mitaka city, Tokyo, Japan. 2) Department of Radiology, Saitama Medical Center, Saitama Medical University, Kawagoe city, Saitama, Japan

1)Yuzo M, Chie S, Koji T, et al. Difficulties in neck clipping of internal carotid posterior communicating aneurysms. Surgery for cerebral stroke. 19; 1: 135-138. 2) Yasargil MG. Middle cerebral artery, inferior medial group or “lenticulostriate or striate vessels”. IN: Yasargil MG, editor. Microneurosurgery Ⅰ. New Yrok: Georg Thieme Verlag Stuttgart; 1984. P.77-84.