305 Magnetic Resonance Elastographyのための加振装置の開発とその評価(OS3-(2) バイオメカニクスにおける新分野の開拓 : 組織粘弾性の無侵襲計測,オーガナイズドセッション)

概要

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MR Elastography is noninvasive MRI method that utilizes propagating acoustic waves to determine elastic properties of tissue. Mechanical actuator provides cyclic motion synchronized to the MRI sequence. In preceding study, pneumatic vibrator is often applicable because it's completely compatible to MR environment. But this vibration characteristic is variable and need to be measured. In this study, development of pneumatic vibrator and its measurement system are reported. And then, frequency characteristics and correlation between mechanical amplitude and phase image contrast are examined.
2009-08-25