Measuring Visceral Fat with Water-Selective Suppression Methods (SPIR, SPAIR) in Patients with Metabolic Syndrome
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概要
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We attempted to measure the area and volume of visceral fat using magnetic resonance (MR) imaging to avoid radiation exposure. We used water suppression-spectral attenuation with inversion recovery (WS-SPAIR) as prepulses and conducted T1 high-resolution isotropic volume examination (THRIVE).1 Image processing software can be used to estimate the area and volume of fat and separate the fat and water signals at a visually optimal threshold in the MR image, which requires contrast enhancement between intestinal contents and visceral fat. In 14 volunteers, we evaluated WS-SPAIR and water suppression-spectral presaturation with inversion recovery (WS-SPIR) with respect to the relationship between the flip angle of THRIVE and signal contrast. We used flip angles of 5°, 10°, and 20°. The minimum threshold that allowed exclusion of intestinal contents from the masked region was determined for each technique. The volume and area of the masked region, which included subcutaneous fat, were measured at the umbilicus level. Both volume and area increased with a smaller flip angle. The masked region was larger with WS-SPIR-THRIVE (flip angle 5°). The size of the masked region was determined according to the minimum threshold that allowed exclusion of the intestinal contents from the masked region, expressing the contrast between the intestinal contents and fat in a relative manner. It was speculated that by separating the signals at the threshold, WS-SPIR-THRIVE (flip angle 5°) was a more suitable technique for measuring the area and volume of visceral fat.
- 日本磁気共鳴医学会の論文
- 2007-10-01
著者
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INOUE Yuichi
Department of Somnology, Tokyo Medical University
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YOSHIYAMA Minoru
Departments of Internal Medicine and Cardiology, Osaka City University Graduate School of Medicine
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Yoshiyama Minoru
Department Of Internal Medicine And Cardiology Graduate School Of Medicine Osaka City University
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Tanaka Masahiro
Department of Fixed Prosthodontics and Occlusion, Osaka Dental University
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Tanaka Masahiro
Department Of Radiology Osaka City General Hospital
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Tanaka Masahiro
Department Of Applied Chemistry
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Teragaki Masakazu
Department Of Internal Medicine And Cardiology Osaka City University Graduate School Of Medicine
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TANAKA Shigeko
Department of Radiology, Division of Medical Technologies, Wakakusa Daiichi Hospital
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IMANISHI Yukihiro
Department of Gastroenterology, Division of Medical Technologies, Wakakusa Daiichi Hospital
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KASAYUKI Noriaki
Department of Cardiology, Division of Medical Technologies, Wakakusa Daiichi Hospital
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SHIMIZU Naruhito
Department of Cardiology, Division of Medical Technologies, Wakakusa Daiichi Hospital
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NAKAHIRA Koichi
Department of Section of Radiology, Division of Medical Technologies, Wakakusa Daiichi Hospital
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HANAKI Takashi
Department of Section of Radiology, Division of Medical Technologies, Wakakusa Daiichi Hospital
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NAITO Yukari
Department of Radiology, Division of Medical Technologies, Wakakusa Daiichi Hospital
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Teragaki Masakazu
Department Of Cardiology Division Of Medical Technologies Wakakusa Daiichi Hospital
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Shimizu Naruhito
Ikuwakai Memorial Hospital
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Shimizu Naruhito
Division Of Cardiology Saiseikai Noe Hospital
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Shimizu Naruhito
Department Of Cardiology Division Of Medical Technologies Wakakusa Daiichi Hospital
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Inoue Yuichi
Department Of Radiology Osaka City University Medical School
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Inoue Yuichi
Department Of Internal Medicine Isahaya Insurance General Hospital
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Naito Yukari
Department Of Radiology Wakakusa Daiichi Hospital
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Hanaki Takashi
Department Of Section Of Radiology Division Of Medical Technologies Wakakusa Daiichi Hospital
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Tanaka Shigeko
Department Of Radiology Wakakusa Daiichi Hospital
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Tanaka Shigeko
Department Of Psychiatry Shiga University Of Medical Science
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Kasayuki Noriaki
Department Of Cardiology Division Of Medical Technologies Wakakusa Daiichi Hospital
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Tanaka Shigeko
Department Of Radiology Division Of Medical Technologies Wakakusa Daiichi Hospital
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Naito Yukari
Department Of Radiology Division Of Medical Technologies Wakakusa Daiichi Hospital
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Imanishi Yukihiro
Department Of Gastroenterology Division Of Medical Technologies Wakakusa Daiichi Hospital
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Inoue Yuichi
Department Of Biochemical Science And Technology Faculty Of Agriculture Kagoshima University
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Yoshiyama Minoru
Department Of Cardiology And Internal Medicine Medical School Osaka City University
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Teragaki Masakazu
Department Of Cardiology And Internal Medicine Medical School Osaka City University
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Tanaka Masahiro
Department Fixed Prosthodontics And Occlusion Osaka Dental University
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Nakahira Koichi
Sections Of Radiology Of The Division Of Medical Technologies Wakakusa Daiichi Hospital
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INOUE Yuichi
Department of Radiology, Osaka City University Medical School
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YOSHIYAMA Minoru
Department Internal Medicine and Cardiology, Osaka City University School of Medicine
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