Assessment of Time-Resolved, Dynamic, Contrast-Enhanced MRDSA Using Radial Sliding-Window Reconstruction
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概要
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Sliding-window reconstruction (SWR) has been recently introduced for rapid imaging that improves temporal resolution while maintaining signal-to-noise ratio (SNR) and spatial resolution. We assessed the quantity of 2-dimensional contrast-enhanced magnetic resonance digital subtraction angiography (2D CE-MRDSA) with non-Cartesian radial SWR in phantom and clinical studies. In phantoms, we compared the quantitative properties of time-intensity curves (TIC) obtained with dynamic 2D CE-MRDSA using SWR in a radial acquisition with those obtained by Cartesian acquisition. We calculated the mean variance and standard deviation among signal intensities in TICs and used SWR to study 2D CE-MRDSA in 5 patients with angiographically proven arteriovenous malformations. Using a 3-point grading scale, we individually scored vascular visualization capability and calculated time delay (TD) from the TIC in the feeding artery (FA), nidus, and draining vein (DV). The maximum signal intensity variance in Cartesian SWR was 6.58±2.27% among time-intensity curves and was 0.87±0.77% radial SWR. Signal intensity in radial SWR decreased significantly (P<0.001) compared with the Cartesian SWR. In clinical study, the mean rating on 2D CE-MRA of the feeding artery was 2.3, nidus, 2.6, and draining vein, 2.6. Mean delay time between DV and FA was 1.8 s. The radial SWR technique is useful for demonstrating the hemodynamic features of vascular malformations in the head with 2D CE-MRDSA.
- 2008-03-31
著者
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ITO Osamu
Department of Neurosurgery, Shi-Koga Hospital
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MURASE Kenya
Department of Medical Engineering, Division of Allied Health Sciences, Osaka University Medical Scho
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WATANABE YUJI
Department of Nuclear Medicine, Faculty of Medicine, Kyoto University
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Murase Kenya
Department Of Medical Physics And Engineering Division Of Medical Technology And Science Course Of H
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Kumashiro Masayuki
Department Of Radiology Kurashiki Central Hospital
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Watanabe Yuji
Department Of Nuclear Medicine Faculty Of Medicine Kyoto University
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Murase Kenya
Department Of Medical Engineering Division Of Allied Health Sciences Osaka University Medical School
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NAGAYAMA Masako
Department of Radiology, Kurashiki Central Hospital
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Nagayama Masako
Department Of Radiology Kurashiki Central Hospital
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ODA Kazunari
Department of Radiology, Kurashiki Central Hospital
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FUKUSHIGE Maya
Department of Medical Physics and Engineering, Division of Medical Technology and Science, Course of
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Oda Kazunari
Department Of Radiology Kurashiki Central Hospital
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Fukushige Maya
Department Of Medical Physics And Engineering Division Of Medical Technology And Science Course Of H
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Watanabe Yuji
Department Of Molecular Neurobiology Institute Of Development Aging & Cancer Tohoku University
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Murase Kenya
Department Of Allied Health Sciences Osaka University Graduate School Of Medicine
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Ito Osamu
Department Of Radiology Kurashiki Central Hospital
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Ito Osamu
Department Of Agricultural Chemistry University Of Tokyo
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Watanabe Yuji
Department Of Computational Science And Engineering Graduate School Of Engineering Nagoya University
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