title: Calibration of cross-sectional images measured by an ultrasound-based muscle evaluation system.
abstract: The quantification of muscle volume can be used to estimate muscular strength. Therefore, we developed a flexible measuring system for muscle volume using ultrasonog-raphy. In the measuring process, subjects are not required to perform any muscular contraction, so it is completely safe and particularly suitable for elderly people. The ultrasound probe is installed on a mechanical arm, and continuously scans fragmental images along the body surface. The measured images are then composed into a wide area cross-sectional image. However, the muscle area measured by our system was slightly smaller than that measured by MRI. because the ultrasound probe contacted the body surface with a little pressure during the measurement. The strain then decreases the total image size and its circumference. This paper introduces our developed system and proposes a new calibration method for the muscle area in the thigh based on its circumference.
authors: Graduate School of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, Fukuoka, Fukuoka, 815-8540, Japan.
authors: Kiyotaka
authors: K
authors: Fukumoto
authors: Satoshi
authors: S
authors: Muraki
authors: Masayoshi
authors: M
authors: Tsubai
authors: Osamu
authors: O
authors: Fukuda
mesh_terms: D019412:Anatomy, Cross-Sectional / Q000379:methods* / Q000592:standards; D002138:Calibration; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods* / Q000592:standards; D021621:Imaging, Three-Dimensional / Q000379:methods* / Q000592:standards; D007564:Japan; D018482:Muscle, Skeletal / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D009929:Organ Size; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014463:Ultrasonography / Q000379:methods* / Q000592:standards