使用导航器在螺旋磁共振成像中进行实时运动检测。

Real-time motion detection in spiral MRI using navigators.

作者信息

Sachs T S, Meyer C H, Hu B S, Kohli J, Nishimura D G, Macovski A

机构信息

Department of Electrical Engineering, Stanford University, CA 94305.

出版信息

Magn Reson Med. 1994 Nov;32(5):639-45. doi: 10.1002/mrm.1910320513.

DOI:10.1002/mrm.1910320513

PMID:7808265

Abstract

A technique has been developed whereby motion can be detected in real time during the acquisition of data. This enables the implementation of an algorithm to accept or reject and reacquire data during a scan. Frames of data with motion are rejected and reacquired on the fly so that by the end of the scan, a complete motion-free data set has been acquired. The algorithm has been implemented on several different types of sequences. Preliminary in vivo studies indicate that motion artifacts are dramatically reduced.

摘要

已经开发出一种技术，通过该技术可以在数据采集过程中实时检测运动。这使得能够实施一种算法，以便在扫描期间接受或拒绝并重新采集数据。有运动的数据帧会被实时拒绝并重新采集，这样在扫描结束时，就可以获得一个完整的无运动数据集。该算法已在几种不同类型的序列上实现。初步的体内研究表明，运动伪影显著减少。