Differential diagnosis of infundibular dilation versus a small aneurysm of the internal carotid artery: assessment by three-dimensional rotational angiography with volume rendering |
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Authors: | Wan-Yin Shi Yong-Dong Li Ming-Hua Li Bin-Xian Gu Jian-Ping Gu |
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Institution: | 1. Department of Interventional Radiology, Nanjing First Hospital, Nanjing Medical University, No. 68 Chang Le Road, Nanjing, 210006, China 2. Institute of Diagnostic and Interventional Radiology, The Sixth Affiliated People’s Hospital, Shanghai Jiao Tong University, No. 600, Yi Shan Road, Shanghai, 200233, China
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Abstract: | We report our findings associated with the differential diagnosis of infundibular dilation (ID) versus a small intracranial aneurysm using three-dimensional rotational angiography with volume rendering (3DRA + VR). Angiographic findings associated with IDs found via two-dimensional digital subtraction angiography (2D-DSA) or 3DRA + VR were reviewed for 138 consecutive patients with known or suspected aneurysms. Two readers independently evaluated the results of 2D-DSA and 3DRA + VR according to the same diagnostic criteria. We also evaluated the ability of 3D-DSA to show the spatial relation between IDs and anterior choroidal (AchA)/posterior communicating (PcomA) arteries. 2D-DSA and 3DRA + VR found 41 and 48 IDs, respectively. 2D-DSA missed five AchA and two PcomA IDs. 2D-DSA was significantly inferior to 3DRA + VR for displaying the spatial relation between IDs and AchA/PcomA (P = 0). Thus, 3DRA + VR provides more useful information for distinguishing IDs from aneurysms. The superiority of 3DRA + VR might be because of its ability to display the spatial relation between IDs and AchA/PcomA. |
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