High-resolution magnetic resonance imaging. Technical concepts and their implementation.
High-resolution magnetic resonance imaging. Technical concepts and their implementation.
复制标题
高分辨率磁共振成像。
DOI：
10.1148/radiology.150.1.6689756
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发表时间：
1984
期刊：
影响因子：
19.7
通讯作者：
Margulis,AR
中科院分区：
文献类型：
--
作者：
Crooks,LE;Hoenninger,J;Arakawa,M;Watts,J;McCarten,B;Sheldon,P;Kaufman,L;Mills,CM;Davis,PL;Margulis,AR
在磁共振（MR）成像中，分别操纵空间分辨率、对比度分辨率和成像时间导致一些参数的改善而不使其他参数退化。作者发现，重复时间TR = 2.0秒的头部MR成像产生的图像具有高信噪比水平，对脱髓鞘疾病和脑含水量具有极好的灵敏度。在身体中，长TR产生大的信号水平，允许描绘低强度结构，如开放的血管和骨骼。长TR技术可用于高分辨率模式（256 X 256个数据采集元件，每个0.8 X 0.8 mm），同时保持50或100秒/切片的图像时间。对于正常分辨率（1.7 X 1.7 mm），成像时间为25或50秒/切片。结论：慢成像技术与同步多切片成像的结合将证明在临床MR中是可行的。
In magnetic resonance (MR) imaging manipulating spatial resolution, contrast resolution, and imaging time separately results in improvement in some parameters without degradation of others. The authors have found that MR imaging of the head with a repetition time TR = 2.0 seconds produces images with high signal-to-noise levels and excellent sensitivity to demyelinating disease and brain water content. In the body, a long TR yields large signal levels that permit delineation of low-intensity structures such as patent vessels and bone. The long TR technique can be used in a high-resolution mode (256 X 256 data acquisition elements, each 0.8 X 0.8 mm) while maintaining image times of 50 or 100 sec/section. For normal resolution (1.7 X 1.7 mm), imaging time is 25 or 50 sec/section. It is concluded that the combination of slow-imaging techniques with simultaneous multisection imaging will prove practical for clinical MR.