RESPIRATORY MOTION OF THE HEART - KINEMATICS AND THE IMPLICATIONS FOR THE SPATIAL-RESOLUTION IN CORONARY IMAGING
RESPIRATORY MOTION OF THE HEART - KINEMATICS AND THE IMPLICATIONS FOR THE SPATIAL-RESOLUTION IN CORONARY IMAGING
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DOI：
10.1002/mrm.1910330517
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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：
--
作者：
WANG, Y;RIEDERER, SJ;EHMAN, RL
在MR冠状动脉成像中，呼吸运动是提高图像分辨率和信噪比的主要限制因素。在这项工作中，呼吸对心脏位置的影响进行了定量研究，通过成像的心脏在不同位置的潮式呼吸与屏气分段快速梯度回波技术在呼吸期间。已经发现，在潮式呼吸期间，由于呼吸引起的心脏的运动由上-下（SI）运动主导，其与横膈膜的SI运动线性相关。由于呼吸引起的心脏运动近似为全局平移。这些结果为采用自适应运动校正技术减少非屏气冠状动脉MR成像中的图像模糊提供了动力。
Respiratory motion is a major limiting factor in improving image resolution and signal-to-noise ratio in MR coronary imaging. In this work the effects of respiration on the cardiac position were studied quantitively by imaging the heart during diastole at various positions of tidal respiration with a breath-hold segmented fast gradient echo technique. It was found that during tidal breathing the movement of the heart due to respiration is dominated by superior-inferior (SI) motion, which is linearly related to the SI motion of the diaphragm. The motion of the heart due to respiration is approximately a global translation. These results provide motivation for employing adaptive motion correction techniques to reduce image blurring in nonbreath-hold coronary MR imaging.