HIFU测温中的多通道相位合成技术研究.pdfVIP

数字医学基础研究 Basic Research of Digital Medicine HIFU测温中的多通道相位合成技术研究 ① ① ① 陈相教 孙健永 张建国 摘 要 近年来，肿瘤热疗研究主要集中在使用高强度聚焦超声（High Intensity Focused Ultrasound，HIFU）来完 [1] 成高温消融。治疗过程中利用磁共振测温技术进行无创测温。基于质子共振频率化学位移方法 （Proton Resonance Frequency，PRF）是磁共振测温普遍使用的方法。为保证实时和精确的要求，需要进行多通道相位合成。通过对多通道的 相位差进行加权平均线性组合，有效提高了测温精度。 关键词　HIFU 相位图 多通道线圈 PRF Doi:10.3969/j.issn.1673-7571.2015.05.012 [中图分类号] R319;R454 [文献标识码] A Research on Combining Phase Image from Multi-channel RF Coils in High-Intensity Focused Ultrasound / CHEN Xiang-jiao, SUN Jian-yong, ZHANG Jian-guo//China Digital Medicine.-2015 10(5): 39 to 41 Abstract Recent years, tumor hyperthermia studies focused on the use of HIFU to complete the high temperature ablation. During hyperthermia，noninvasive temperature measurement is realized by using magnetic resonance temperature measurement technology. PRF is a commonly used method in magnetic resonance temperature measurement. In order to guarantee the real-time and precision requirements, we need to combine phase images from multi-channel coils. In this paper, we use weighted average linear combination to deal with phase difference of multi channel, effectively improving the accuracy of temperature. Keywords HIFU, phase image, multi-channel coils, PRF Fund project National Science and Technology Support Project-Research on the Integrated Fusion Technology of Physical Therapy of Tumor Guided by Magnetic Resonance in Real Time (No. 2012BAI15B07) Corresponding author Medical Imaging Laboratory, the Shanghai Institute of Technical Physics (SITP) of the Chinese Academy of S