[1]刘镖水,张晶,程军营,等.基于多分辨率和区域增长的两点Dixon水脂分离技术[J].南方医科大学学报,2017,(02):245.
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基于多分辨率和区域增长的两点Dixon水脂分离技术()
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《南方医科大学学报》[ISSN:/CN:]

卷:
期数:
2017年02期
页码:
245
栏目:
出版日期:
2017-01-22

文章信息/Info

Title:
A two-point Dixon technique for water-fat separation using multiresolution and region-growing algorithm
作者:
刘镖水张晶程军营华佳冯衍秋
关键词:
磁共振成像水脂分离相位校正Dixon技术区域增长
Keywords:
magnetic resonance imaging water-fat separation phase correction Dixon technique region-growing
摘要:
目的提出一种改进的基于区域增长的水脂分离方法,使其可以在低信噪比情况下更可靠。方法对获取的两幅场向量图 分别进行隔行隔列降采样,得到四幅子图像。每幅子图像分别运用区域增长算法获得误差向量图,然后再利用空间相邻像素相 位平滑的性质来合并获得的四幅子误差向量图,从而获得一幅平滑的误差向量图,并实现水和脂肪的准确分离。结果提出方 法分别应用于仿真数据和真实数据,仿真数据表明本文方法产生的误差更小。真实数据实验结果表明,提出方法在膝盖、腹部 和大腿等部位都能够准确的实现水和脂肪的分离。结论相对于原始全局区域增长方法,提出方法更加可靠和鲁棒,能够在不 同解剖部位实现准确水脂分离。
Abstract:
Objective An improved water-fat separation method based on region –growing was proposed for use in regions with low signal-noise ratio (SNR). Methods Region-growing method was applied to 4 sub-images acquired by a downsampling operation on the acquired phasor maps. The spatial smoothing constraint was exploited to calculate 4 error phasor maps to construct the final smooth error phasor map, which was used in two-point Dixon technique for water-fat separation. Results The simulation experiment showed that the proposed method produced smaller errors, and for clinical images of the knees, abdomen and lower limbs, the proposed method achieved accurate water-fat separations. Conclusion The proposed method is more robust and reliable than the original global region-growing algorithm, and serves as a promising water-fat separation method for clinical applications.

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更新日期/Last Update: 1900-01-01