SPATIAL-FREQUENCY-TUNED MARKERS AND ADAPTIVE CORRECTION FOR ROTATIONAL MOTION
SPATIAL-FREQUENCY-TUNED MARKERS AND ADAPTIVE CORRECTION FOR ROTATIONAL MOTION
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DOI：
10.1002/mrm.1910330511
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发表时间：
1995-05-01
影响因子：
3.3
通讯作者：
EHMAN, RL
中科院分区：
文献类型：
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作者：
KORIN, HW;FELMLEE, JP;EHMAN, RL
在临床磁共振成像检查中存在的常见类型的运动是旋转运动，诸如由于头部检查期间的随意运动而引起的旋转运动。在这项工作中提出的校正方案提供了一种方法，用于消除成像平面内的旋转的影响。该技术的实现不可或缺的是空间频率调谐标记的概念和设计，其用于跟踪旋转运动。这些研究表明，可以准确跟踪运动，测量旋转轴和旋转角度，并使用此信息来回顾性校正采集的图像。这些标记还可以提供关于存在的任何平移运动的信息。由此产生的图像显示出伪影的显著减少和清晰度的提高。
A common type of motion present in clinical magnetic resonance imaging examinations is rotational motion, such as that due to voluntary motion during head examinations. The correction scheme presented in this work offers a method for eliminating the effects of rotations within the imaging plane. Integral to the implementation of this technique is the concept and design of spatial-frequency-tuned markers, which are used to track the rotational motion. These studies showed that it is possible to accurately track the motion, measuring both axis and angle of rotation, and use this information to retrospectively correct the acquired images. These markers can also provide information about any translational motion present. The resulting images show a marked decrease in artifacts and improved clarity.