Real-Time Optical Motion Correction for Diffusion Tensor Imaging

被引：89

作者：

Aksoy, Murat

Forman, Christoph ^{[2
]}

Straka, Matus

Skare, Stefan ^{[3
]}

Holdsworth, Samantha

Hornegger, Joachim ^{[2
]}

Bammer, Roland ^{[1
]}

机构：

[1] Stanford Univ, Lucas Ctr, Dept Radiol, Stanford, CA 94305 USA

[2] Univ Erlangen Nurnberg, Dept Comp Sci, Pattern Recognit Lab, Erlangen, Germany

[3] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden

来源：

MAGNETIC RESONANCE IN MEDICINE | 2011年 / 66卷 / 02期

关键词：

motion; DTI; diffusion; real-time motion correction; optical motion correction; prospective motion correction; HEAD MOTION; SENSE RECONSTRUCTION; PHASE CORRECTION; TRACKING SYSTEM; MOVING SUBJECTS; PROPELLER MRI; FMRI; DTI;

D O I：

10.1002/mrm.22787

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Head motion is a fundamental problem in brain MRI. The problem is further compounded in diffusion tensor imaging because of long acquisition times, and the sensitivity of the tensor computation to even small misregistration. To combat motion artifacts in diffusion tensor imaging, a novel real-time prospective motion correction method was introduced using an in-bore monovision system. The system consists of a camera mounted on the head coil and a self-encoded checker-board marker that is attached to the patient's forehead. Our experiments showed that optical prospective motion correction is more effective at removing motion artifacts compared to image-based retrospective motion correction. Statistical analysis revealed a significant improvement in similarity between diffusion data acquired at different time points when prospective correction was used compared to retrospective correction (P < 0.001). Magn Reson Med 66:366-378, 2011. (C)2011 Wiley-Liss, Inc.

引用

页码：366 / 378

页数：13

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