Performance Evaluation of A Prototype Pneumatic Driver for MR Elastography by MR Elastography
Magnetic resonance elastography (MRE) is an MR imaging technique which can be used to visualize acoustic strain wave propagation in tissues and quantify their stiffness when they are subjected to external mechanical excitation. Generation of acoustic mechanical waves within tissue via a coupled, MR compatible mechanical driver with stable phase and amplitude is crucial in these experiments. Among the several methods to generate the mechanical waves, pneumatic driver is popular because of its low cost and good MR compatibility. However, it is not easy to evaluate the pneumatic drivers performance when different passive drivers and tubes of various dimensions are used. This paper describes the evaluation of a prototype pneumatic driver without load using ultrasound, and compared the results under load using the phase images from MRE experiment. Our experiment showed that the frequency and amplitude of the mechanical wave used should be carefully adjusted for different applications.
MR Elastography pneumatic driver shear wave
WeiRui Cai Hui Wang WenHui Huang Yiu-Cho Chung LiJuan Zhang Chao Zou HaiRong Zheng
College of Electrical and Information Engineering, Hunan University, Changsha, China Paul C. Lauterb College of Electrical and Information Engineering, Hunan University, Changsha, China Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology
国际会议
上海
英文
429-432
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）