intensity focused ultrasound based on a matching pursuit method

in an overcomplete dictionary composed of the clinic, no matter with or without the presence of cavitation unit-norm vectors that mimic the ultrasonic pulse-echo to be and thermal diffusion. At present, two major categories of estimated. Each ultrasonic echo is principally represented by a imaging modality are used for this purpose, which are magnetic unit-norm vector and therefore has a physical interpretation. we resonance imaging (MRI) (2) and ultrasound imaging (3). MRI use the MP method to analyze noisy ultrasonic echo obtained in has been shown to be extremely effective because it can different stages during and after HIFU treatment and decompose the noisy echo into unit-norm vectors. The approximation of the provide good anatomic resolution of soft tissue with high echo can be obtained by the reconstruction result with several accuracy for localizing tumors and lesions induced by HIFU large coefficient unit-norm vectors. In the current research we (4). Furthermore, the proton-resonant frequency in MRI is compared lesion sizes obtained from our method, from temperature dependent and the phase change at each time point measurement of physical lesions exposure, ultrasonic can be used to detect temperature elevation during HIFU integrated backscatter (IBS) images and from conventional B- treatment (5). However, it is restricted by several factors, mode images, no matter with or without hyperecho. It was found including the requirement of minimal use of paramagnetic parts in freshly excised bovine livers that more precise definition of the in HIFU equipments, high costs, and inherently not real time. treated area was obtained from the MP images than from the IBS images and the conventional B-mode images. When comparing to physical lesion sizes, there was no significant difference. We demonstrated the feasibility of our proposed MP-based method for the localization of HIFU-induced lesions immediately after HIFU treatment. Meanwhile our method can detect lesion locations even without the appearance of hyperecho.