Feasibility of Navigator Setting on the Left Diaphragm for Whole-heart Coronary MRA : A Study in Healthy Volunteers
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概要
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Purpose: We prospectively compared the quality of images obtained by navigator setting on the left and right diaphragm on whole-heart coronary magnetic resonance angiography (WHCMRA). Methods: In 10 healthy volunteers, we performed free-breathing, 3-dimensional segmented true fast imaging with steady-state precession (trueFISP) WHCMRA by setting the navigator on the left and right diaphragm in random order. For the left diaphragm, we set the navigator outside the scope of the heart to avoid the influence on coronary arteries. We compared image acquisition time and visible length of coronary arteries using paired t-test and subjective image quality on a 4-point scale (1, poor; 4, excellent) using Wilcoxon signed-rank test. Results: Mean overall subjective image quality was significantly better in the left diaphragm than the right (3.3±0.7 versus 2.9±0.9, P=0.02). Mean overall visible length of the coronary arteries was significantly better in the left diaphragm than the right (115.4±31.1 vs. 112.6±29.9 mm, P=0.02). Mean acquisition time between the left and right diaphragm was not significantly different (15.6±5.0 versus 16.0±5.7 min, P=0.79). Conclusion: In this small group of healthy volunteers, navigator setting for WHCMRA was superior on the left diaphragm than the right; however, feasibility of the technique requires additional consideration in a larger group of actual patients.
- 2009-03-01
著者
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WATANABE Kunihiro
Department of Radiology, Saitamaken Saiseikai Kurihashi Hospital
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MORITA Satoru
Department of Radiology, Tokyo Womens Medical University Medical Center East
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SUZUKI Takayoshi
Department of Radiology, Saitamaken Saiseikai Kurihashi Hospital
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MARUYAMA Kazuhiro
Department of Radiology, Saitamaken Saiseikai Kurihashi Hospital
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NODA Mayumi
Department of Cardiology, Saitamaken Saiseikai Kurihashi Hospital
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OHNISHI Takahiro
Siemens-Asahi Medical Technologies
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FUJITA Mitsuo
Department of Radiology, Saitamaken Saiseikai Kurihashi Hospital
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OHNISHI Takahiro
Application group, Siemens-Asahi Medical Technologies
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Noda Mayumi
Department Of Cardiology Saitamaken Saiseikai Kurihashi Hospital
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Fujimura Mikihiko
Department Of Radiology Tokyo Women's Medical University Medical Center East
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Morita Satoru
Department Of Gastroenterology Hamamatsu Medical Center Hamamatsu University School Of Medicine
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Suzuki Takayoshi
Department Of Internal Medicine Tokai University School Of Medicine
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Ohnishi Takahiro
Application Group Siemens-asahi Medical Technologies
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Maruyama Kazuhiro
Department Of Radiology Saitamaken Saiseikai Kurihashi Hospital
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Maruyama Kazuhiro
Department Of Chemistry Faculty Of Science Kyoto University
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Watanabe Kunihiro
Department Of Chemical Industry Science University Of Tokyo
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Watanabe Kunihiro
Department Of Radiology Saitamaken Saiseikai Kurihashi Hospital
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Morita Satoru
Department Of Cardiovascular Surgery National Hospital Organization Higashihiroshima Medical Center
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Suzuki Takashi
Department Of Radiology Saitamaken Saiseikai Kurihashi Hospital
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Suzuki Takayoshi
Department Of Chemistry Faculty Of Science Okayama University
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Suzuki Takayoshi
Department Of Bioresource Environment Faculty Of Bioresource Sciences Akita Prefectural University
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