Noninvasive temperature mapping with MRI using chemical shift water-fat separation.
Noninvasive temperature mapping with MRI using chemical shift water-fat separation.
复制标题
使用化学位移水脂肪分离的 MRI 无创温度测绘。
DOI:
10.1002/mrm.22310
复制
发表时间:
2010-05
影响因子:
3.3
通讯作者:
MacFall, James R.
中科院分区:
文献类型:
--
作者:
Soher, Brian J.;Wyatt, Cory;Reeder, Scott B.;MacFall, James R.
Tissues containing both water and lipids, e.g., breast, confound standard MR proton reference frequency-shift methods for mapping temperatures due to the lack of temperature-induced frequency shift in lipid protons. Generalized Dixon chemical shift–based water-fat separation methods, such as GE’s iterative decomposition of water and fat with echo asymmetry and least-squares estimation method, can result in complex water and fat images. Once separated, the phase change over time of the water signal can be used to map temperature. Phase change of the lipid signal can be used to correct for non-temperature-dependent phase changes, such as amplitude of static field drift. In this work, an image acquisition and postprocessing method, called water and fat thermal MRI, is demonstrated in phantoms containing 30:70, 50:50, and 70:30 water-to-fat by volume. Noninvasive heating was applied in an Off1-On-Off2 pattern over 50 min, using a miniannular phased radiofrequency array. Temperature changes were referenced to the first image acquisition. Four fiber optic temperature probes were placed inside the phantoms for temperature comparison. Region of interest (ROI) temperature values colocated with the probes showed excellent agreement (global mean ± standard deviation: −0.09 ± 0.34°C) despite significant amplitude of static field drift during the experiments.
登录
查看更多内容
影响因子:
11.5
作者:
Jones, EL;Prosnitz, LR;Vujaskovic, Z
通讯作者:
Vujaskovic, Z
影响因子:
3.3
作者:
Griffin, JL;Williams, HJ;Nicholson, JK
通讯作者:
Nicholson, JK
影响因子:
3.3
作者:
Reeder, SB;Pineda, AR;Pelc, NJ
通讯作者:
Pelc, NJ
DOI:
10.1085/jgp.26.2.179
发表时间:
1942-11-20
期刊:
The Journal of general physiology
影响因子:
--
作者:
Lynn JG;Zwemer RL;Chick AJ;Miller AE
通讯作者:
Miller AE
影响因子:
3.3
作者:
Ma, JF
通讯作者:
Ma, JF