THE EFFECT OF MOTION ON TWO-DIMENSIONAL FOURIER TRANSFORMATION MAGNETIC-RESONANCE IMAGES
THE EFFECT OF MOTION ON TWO-DIMENSIONAL FOURIER TRANSFORMATION MAGNETIC-RESONANCE IMAGES
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DOI：
10.1148/radiology.152.1.6729101
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发表时间：
1984-01-01
期刊：
影响因子：
19.7
通讯作者：
CLAMPITT, ME
中科院分区：
文献类型：
--
作者：
SCHULTZ, CL;ALFIDI, RJ;CLAMPITT, ME
本文用体模、动物和正常志愿者研究了运动对二维傅里叶变换磁共振（MR）图像的影响。所有的图像都是用0.30特斯拉超导磁体使用自旋回波脉冲序列获得的。在对体模成像时模拟呼吸运动。除了图像模糊之外，运动还产生重影或图像谐波。这些重影图像是以周期性间隔产生的静态图像的副本。在呼吸过程中和箭毒给药后获得的犬图像显示，呼吸运动消除后，犬的情况有显著改善。正常志愿者的图像与呼吸和心脏门控改善，但数据采集时间显着增加。这些结果表明，MR图像质量可以通过在单次屏气内采集所有必要数据的系统来提高。
The effect of motion on 2-dimensional Fourier transformation magnetic resonance (MR) images was investigated using phantoms, animals and normal volunteers. All images were obtained with a 0.30-Tesla superconducting magnet using spin echo pulse sequences. Respiratory motion was simulated while imaging the phantoms. In addition to image blurring, motion produced ghost images or image harmonics. These ghost images were copies of the static image that was produced at periodic intervals. Canine images, which were obtained during respiration and after the administration of curare, showed significant improvement after respiratory motion was eliminated. Images of normal volunteers were improved with respiratory and cardiac gating, but data acquisition time was significantly increased. These results indicate that MR image quality could be improved with a system that acquires all necessary data within a single breath-hold.