@inproceedings{c61f20a9e1e245f1b063a5bba0ad5628,
title = "Monitoring imaging of lesions induced by high intensity focused ultrasound based on a matching pursuit method",
abstract = "We investigated the feasibility of a monitoring imaging method to visualize and evaluate the high intensity focused ultrasound (HIFU) induced lesion in vitro during and after their formation, which was based on a modified matching pursuit algorithm (MP). The method is based on the concept of sparse signal approximation in an overcomplete dictionary composed of unit-norm vectors that mimic the ultrasonic pulse-echo to be estimated. Each ultrasonic echo is principally represented by a unit-norm vector and therefore has a physical interpretation. we use the MP method to analyze noisy ultrasonic echo obtained in different stages during and after HIFU treatment and decompose the noisy echo into unit-norm vectors. The approximation of the echo can be obtained by the reconstruction result with several large coefficient unit-norm vectors. In the current research we compared lesion sizes obtained from our method, from measurement of physical lesions after exposure, ultrasonic integrated backscatter (IBS) images and from conventional B-mode images, no matter with or without hyperecho. It was found in freshly excised bovine livers that more precise definition of the 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.",
keywords = "HIFU, Hyperecho, Lesion, Monitoring, ultrasound",
author = "Weidong Song and Siyuan Zhang and Jinjin Wan and Mingxi Wan",
note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; IEEE International Ultrasonics Symposium, IUS 2015 ; Conference date: 21-10-2015 Through 24-10-2015",
year = "2015",
month = nov,
day = "13",
doi = "10.1109/ULTSYM.2015.0491",
language = "英语",
series = "2015 IEEE International Ultrasonics Symposium, IUS 2015",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2015 IEEE International Ultrasonics Symposium, IUS 2015",
}