A local excitation magnetic resonance imaging method for intracranial unruptured aneurysm at the distal internal carotid artery. (August 2018)

• Record Type: Journal Article
• Authors: Suzuki, Megumu; Satow, Takeshi; Komuro, Taro; Kobayashi, Akira; Miyamoto, Susumu
• Is Part Of: Journal of clinical neuroscience. Volume 54(2018)
• Page Start: 152
• Page End: 155
• Publication Date: 2018-08
• Subjects: ICA internal carotid artery -- PcoA posterior communicating artery -- AcoA anterior choroidal artery -- MRI magnetic resonance imaging -- MRA magnetic resonance angiography -- LE local excitation -- TOF time-of-flight -- DSA digital subtraction angiography -- 3D three-dimensional -- TSE turbo spine echo -- EPI echoplanar imaging; Local excitation -- Magnetic resonance imaging -- Unruptured intracranial aneurysm -- Distal internal carotid artery; Brain -- Surgery -- Periodicals; Neurosciences -- Periodicals; Nervous system -- Surgery -- Periodicals; Brain -- surgery -- Periodicals; Neurosurgical Procedures -- Periodicals; Neurosciences -- Periodicals; Electronic journals; 616.8
• DOI: 10.1016/j.jocn.2018.06.012
• Languages: English
• ISSNs: 0967-5868

Abstract

Highlights: We distinguished aneurysm from infundibular dilatation by local excitation method. Local excitation method clarified the configuration of the prominent lesion. This method clarified the location of the branch orifice on the parent vessel. Local excitation method provided the high spatial resolution and shorter scan time. Abstract: It is often difficult to diagnose an intracranial aneurysm at the distal internal carotid artery by conventional magnetic resonance imaging. Purpose: We assessed the effectiveness of the local excitation technique, a new application for magnetic resonance imaging, to clarify the geometric structure of aneurysm and adjacent branches at the distal internal carotid artery. Study design: Two independent evaluators diagnosed 10 cases of suspected aneurysms at the distal internal carotid artery by T2-weighted magnetic resonance imaging with application of local excitation, adding it to conventional time-of-flight–magnetic resonance angiography. Findings: We successfully distinguished the aneurysm from infundibular dilatation in five of 10 cases. Conclusion: Our results suggested that addition of local excitation to conventional magnetic resonance angiography was effective to diagnose unruptured aneurysm at the distal internal carotid artery, to clarify the configuration of the prominent lesion or whether the location of the adjacent branch orifice on the parent vessel was symmetric or asymmetric.