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    • 6. 发明授权
    • Variable-length correlation method for motion correction in SPECT myocardial perfusion imaging
    • SPECT心肌灌注成像运动修正的可变长度相关方法
    • US06473636B1
    • 2002-10-29
    • US09496764
    • 2000-02-03
    • Guo-Qing WeiJianzhong QianEric Q. ChenJohn C. Engdahl
    • Guo-Qing WeiJianzhong QianEric Q. ChenJohn C. Engdahl
    • A61B505
    • A61B5/416A61B5/0275A61B5/4244Y10S128/922
    • According to one embodiment of the invention, a variable length correlation method is provided for compensating for body motions and heart creep in a sequence of image frames obtained by single-photon emission computed tomograph (SPECT) myocardial perfusion imaging. Abrupt body motions, gradual body motions, and heart upward creep are detected and corrected in the sequence of image frames, based on varying correlation lengths. A linear transformation is used to compensate for appearance changes of the heart under different acquisition angles so as to achieve high accuracy of motion detection and correction. The detecting and correcting step is applied in the two-dimensional image domain. The method also includes the steps of detecting and excluding high intensity, non-heart regions in a particular image frame so that non-heart motions such as bowel gas, spleen, and liver motions are excluded from being involved in the motion detection and correction procedure.
    • 根据本发明的一个实施例,提供了一种可变长度相关方法,用于补偿通过单光子发射计算机断层摄影(SPECT)心肌灌注成像获得的一系列图像帧中的身体运动和心脏蠕动。 基于变化的相关长度,在图像帧序列中检测和校正突然的身体运动,逐渐的身体运动和心脏向上的蠕变。 线性变换用于补偿不同采集角度下心脏的外观变化,从而实现运动检测和校正的高精度。 检测和校正步骤应用于二维图像域。 该方法还包括以下步骤:检测和排除特定图像帧中的高强度非心脏区域,使得诸如肠气,脾脏和肝脏运动之类的非心脏运动被排除参与运动检测和校正过程 。