Echocardiogram-gated computed tomographic and magnetic resonance angiographies for the detection of pulsatile expansion at the intracranial arterial bifurcation

Young Jun Lee, Tae Sub Chung, Yoon Chul Rhim, Sang Hyun Suh, Thomas K.F. Foo

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OBJECTIVE: To identify the pulsatile small vascular lesion by echocardiogram (ECG)-gated computed tomographic (CT) and magnetic resonance (MR) angiographies. METHODS: Seven patients who exhibited small evagination at the cerebral artery bifurcations on 3-dimensional (3D) time-of-flight MR angiogram were enrolled. They were examined by conventional/ECG-gated CT angiogram (n = 6) and ECG-gated MR angiogram (n = 5). Echocardiogram-gated MR angiogram was performed with 3D time of flight, triggered after each time window. From ECG-gated CT and MR angiograms, consecutive 10-phase images within a single cardiac cycle were obtained. RESULTS: The pulsatile change of evagination was demonstrated on both ECG-gated CT angiogram (5 of 6 patients) and ECG-gated MR angiogram (all 5 patients). Flattening of the evagination during the diastolic phase was observed in 4 of 6 ECG-gated CT angiograms and 3 of 5 ECG-gated MR angiograms. Of note was a patient with a tiny evagination (<2 × 1 mm); pulsatile change was demonstrated only by ECG-gated MR angiogram. CONCLUSION: The pulsatile expansion of evagination at the cerebral artery bifurcation can be demonstrated on ECG-gated CT/MR angiograms.

Original languageEnglish
Pages (from-to)842-846
Number of pages5
JournalJournal of Computer Assisted Tomography
Issue number6
Publication statusPublished - 2010 Nov 1


All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

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