Thickman D, Rubinstein R, Askenase A, Cabellero-Saez A
Department of Radiology, Presbyterian-University of Pennsylvania Medical Center, Philadelphia 19104.
Magn Reson Med. 1988 Apr;6(4):390-6. doi: 10.1002/mrm.1910060404.
In order to optimize overall cardiac image quality on MR images experienced observers were asked to rank and rate MR images of the heart. The effect of phase-encoding direction and use of cardiac triggering with and without respiratory gating was examined in three orthogonal imaging planes. Results indicate that use of both respiratory and cardiac gating yields the best images. Adequate images of the heart can be obtained without respiratory gating. The quality of images of the heart can be optimized by proper selection of the direction of the phase-encoding gradient. These are improved by using horizontal phase encoding in the sagittal plane and vertical phase encoding in transverse and coronal planes.
为了优化心脏磁共振（MR）图像的整体质量，要求经验丰富的观察者对心脏MR图像进行排序和评分。在三个正交成像平面中，研究了相位编码方向以及使用和不使用呼吸门控的心脏触发的效果。结果表明，同时使用呼吸门控和心脏门控可产生最佳图像。不使用呼吸门控也可获得足够的心脏图像。通过适当选择相位编码梯度的方向可以优化心脏图像的质量。在矢状面中使用水平相位编码以及在横断面和冠状面中使用垂直相位编码可改善这些图像质量。
