Shankaranarayanan A, Simonetti O P, Laub G, Lewin J S, Duerk J L
Department of Radiology (Magnetic Resonance Imaging), Case Western Reserve University and University Hospitals of Cleveland, 11100 Euclid Ave, Cleveland, OH 44106, USA.
Radiology. 2001 Dec;221(3):827-36. doi: 10.1148/radiol.2213010455.
The authors developed and evaluated two cine magnetic resonance (MR) imaging sequences with a radial rather than a rectilinear k-space coordinate frame: segmented k space and real-time true fast imaging with steady-state precession, or FISP. The two radial k-space segmentation (or view sharing) techniques, which were interleaved or continuous, were compared, and the feasibility of their application in cardiac cine MR imaging was explored in phantom and volunteer studies. Images obtained with the radial sequences were compared with those obtained with two-dimensional Fourier transform, or 2DFT, sequences currently used in cine MR imaging. Temporal resolution of 55 msec was achieved with the real-time radial sequences, which allowed acquisition of almost 19 high-quality images per second.
作者开发并评估了两种采用径向而非直线型k空间坐标框架的电影磁共振（MR）成像序列：分段k空间和稳态进动实时真快速成像（FISP）。比较了两种交错或连续的径向k空间分割（或视图共享）技术，并通过模型和志愿者研究探讨了它们在心脏电影MR成像中的应用可行性。将径向序列获得的图像与目前电影MR成像中使用的二维傅里叶变换（2DFT）序列获得的图像进行比较。实时径向序列实现了55毫秒的时间分辨率，每秒可采集近19幅高质量图像。
