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Motion compensated projection reconstruction
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DOI：10.1002/(SICI)1522-2594(199905)41:5<954::AID-MRM15>3.3.CO;2-A.png)
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摘要
En 中文
Over recent years, MRI has shown the capability for real-time applications. Although the acquisition times of fast MRI methods have been reduced significantly, patient motion during a magnetic resonance imaging (MRI) examination still causes artifacts in the image. In this paper, the effects of motion in MRI using a radial acquisition scheme are examined. It is shown that motion can be estimated without the use of additional measurement, based on the acquired projections only. A new reconstruction technique is introduced that integrates a motion compensation algorithm into the MR-reconstruction process, resulting in a significant reduction of blurring artifacts in the reconstructed images. The proposed method is applied to different kinds of motion such as kinetic joint studies. Magn Reson Med 41:954-963, 1999. (C) 1999 Wiley-Liss, Inc.
Keyword:
MRI
motion correction
projection-reconstruction
