NDLI: A fast referenceless MR thermometry technique

Content Provider	IEEE Xplore Digital Library
Author	Huan Shen Chao Zou Mengyue He Yiu-Cho Chung Lan Liu Xin Liu
Copyright Year	2011
Description	Author affiliation: School of Information Engineering, Wuhan University of Technology, Wuhan, China (Lan Liu) \|\| Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China (Huan Shen; Chao Zou; Mengyue He; Yiu-Cho Chung; Xin Liu)
Abstract	Referenceless proton resonance frequency (PRF) shift thermometry is robust to B0 drift and inter-scan tissue displacement in temperature change measurement during minimally invasive thermotherapy procedures such as High Intensity Focused Ultrasound (HIFU). In this method, the baseline phase of the heated region is extrapolated from unheated region by a polynomial model. The procedure would involve the time-consuming phase unwrapping procedure necessary for polynomial modeling. We propose here a novel method for referenceless PRF without the need for phase unwrapping. The method fits the spatial derivative of phase image to the polynomial model to avoid phase unwrapping. The baseline phase of heated region is then numerically integrated from the predicted phase derivative image based on the polynomial model. Our experiment demonstrated that the new method improved computational efficiency by 2 to 4 times with slightly better accuracy to the original referenceless thermometry. The speed improvement would facilitate the application of the technique to multi-slice and 3D near-real-time MR thermometry.
Starting Page	20
Ending Page	23
File Size	391465
Page Count	4
File Format	PDF
ISBN	9781424493517
e-ISBN	9781424493524
DOI	10.1109/BMEI.2011.6098347
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature measurement Temperature sensors Magnetic Resonance Imaging Referenceless therm-ometry Heating Fitting Polynomials Biomedical imaging phase unwrapping
Content Type	Text
Resource Type	Article

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