AJDRAJNR - American Journal of Neuroradiology

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TECHNICAL NOTE
INTERVENTIONAL

Differential Diagnosis of the Infundibular Dilation and Aneurysm of Internal Carotid Artery: Assessment with Fusion Imaging of 3D MR Cisternography/Angiography

T. Satoha, M. Omib, C. Ohsakob, K. Fujiwarac, K. Tsunoc, W. Sasaharaa,d, K. Onodad, K. Tokunagad, K. Sugiud and I. Dated

a Department of Neurological Surgery,Ryofukai Satoh Neurosurgical Hospital, Fukuyama, Hiroshima, Japan
b Department of Diagnostic Radiology, Ryofukai Satoh Neurosurgical Hospital, Fukuyama, Hiroshima, Japan
c Department of Neurological Surgery, Kosei General Hospital, Mihara, Hiroshima, Japan
d Department of Neurological Surgery, Okayama University Postgraduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan

Address correspondence to Toru Satoh, MD, Department of Neurological Surgery, Ryofukai Satoh Neurosurgical Hospital, 5-23-23 Matsunaga, Fukuyama, Hiroshima, 729-0104, Japan

SUMMARY: Fusion imaging of 3D MR cisternography/angiography was used for the assessment of the vascular bulging finding detected by MR angiography from the viewpoint of the outer wall configuration of the corresponding internal carotid artery depicted by MR cisternography. With a fusion image, useful information was obtained to distinguish an infundibular dilation and enlarged origin of the normal posterior communicating artery from an aneurysm. This imaging technique can be a feasible addition to a noninvasive screening of cerebrovascular lesions with MR angiography alone.