应用于二维化学位移成像的约束重建

Constrained reconstruction applied to 2-D chemical shift imaging.

作者信息

Wear K A, Myers K J, Rajan S S, Grossman L W

机构信息

Center for Devices and Radiological Health, Food and Drug Administration, Rockville, MD 20852 USA.

出版信息

IEEE Trans Med Imaging. 1997 Oct;16(5):591-7. doi: 10.1109/42.640749.

DOI:10.1109/42.640749

PMID:9368114

Abstract

The method of constrained reconstruction, previously applied to magnetic resonance imaging (MRI), is extended to magnetic resonance spectroscopy. This method assumes a model for the MR signal. The model parameters are estimated directly from the phase encoded data. This process obviates the need for the fast Fourier transform (FFT) (which often exhibits limited resolution and ringing artifact). The technique is tested on simulated data, phantom data, and data acquired from human liver in vivo. In each case, constrained reconstruction offers spatial resolution superior to that obtained with the FFT.

摘要

先前应用于磁共振成像（MRI）的约束重建方法被扩展到磁共振波谱学。该方法假定了一个磁共振信号模型。模型参数直接从相位编码数据中估计。这个过程无需快速傅里叶变换（FFT）（其常常表现出有限的分辨率和振铃伪影）。该技术在模拟数据、体模数据以及从人体肝脏活体采集的数据上进行了测试。在每种情况下，约束重建提供的空间分辨率都优于使用FFT所获得的分辨率。