1.Assessment of abdominal visceral fat measured by dual bioelectrical impedance analysis in rugby football players
Chiaki Yamashita ; Kayoko Yamazaki ; Yuri Kanesada ; Takashi Miyawaki ; Reiko Nakayama ; Shingo Okazaki ; Naoko Komenami
Japanese Journal of Physical Fitness and Sports Medicine 2015;64(2):251-259
Visceral fat accumulation is a notable risk factor in the incidence of lifestyle-related diseases such as metabolic and circulatory disorders. In this study, we measured visceral fat area (VFA) and subcutaneous fat area (SFA) in rugby football players by using dual bioelectrical impedance analysis, as well as other metabolic and circulatory parameters. A total of 28 male players (15 forwards, 13 backs; mean age±SD: 23±4 years) participated in this study. VFA and SFA were significantly correlated with body weight. Thus, heavier players had higher VFA and SFA as well as higher body weight. In addition, VFA was significantly correlated with various blood parameters such as alanine aminotransferase, gamma-glutamyl transpeptidase, and triglyceride. Six of the 28 players met the criteria for visceral obesity, defined as both body mass index ≥25 kg/m2 and VFA ≥100 cm2. In some of these players, blood parameters such as high-density lipoprotein cholesterol <40 mg/dL, triglyceride ≥150 mg/dL, or systolic blood pressure ≥130 mmHg indicated elevated risk for metabolic syndrome. These findings suggest that in athletes like heavier rugby football players, abdominal visceral fat accumulation may indicate risk of lifestyle-related diseases.
2.Fundamental Study of Reduced Radiation Exposure of Virtual Endoscopy by 16 DAS MDCT
Yasuji YAMADA ; Masanori KATOH ; Makoto NAGAI ; Shingo OKAZAKI ; Shunichi NAKAMURA ; Tsukasa SUGAWARA ; Norio KONDOH ; Kencho MIYASHITA ; Akira FUJINAGA
Journal of the Japanese Association of Rural Medicine 2006;55(5):459-464
Our aim was to study the scan protocol of 16 DAS (Data Acquisition System) multidetector-row CT (MDCT) and to ascertain whether we could reduce radiation exposure and scanning time, while maintaing image quality in the Virtual endoscopy (VE).We made a mimic gastrointestinal tract and examined the result by changing a scan protocol of 16 DAS MDCT.We found that a reduction of radiation exposure and scanning time depended on slice width, angle of the table, rotation time, table speed, mAs/slice and resolution.The study confirmed that it was possible to use the scan protocol of MDCT with a radiographic dose of 40% and scanning time of 50%, without changing image quality in the VE.
Radiation
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amsonic acid
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Protocols documentation
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Endoscopy
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Accident due to exposure to weather conditions