REDUCTION OF MR IMAGING TIME BY THE HYBRID FAST-SCAN TECHNIQUE
REDUCTION OF MR IMAGING TIME BY THE HYBRID FAST-SCAN TECHNIQUE
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DOI：
10.1148/radiology.158.2.3941881
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发表时间：
1986-02-01
期刊：
影响因子：
19.7
通讯作者：
LINGA, NR
中科院分区：
文献类型：
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作者：
HAACKE, EM;BEARDEN, FH;LINGA, NR
在磁共振(MR)成像中收集高分辨率和高信噪比(S/N)数据所花费的时间可能是患者吞吐量和减少患者运动的限制因素。将二维傅里叶变换(2DFT)的静态和振荡相位编码梯度与回波平面成像相结合的混合快速扫描技术可以减少采集数据所需的时间，但代价是S/N的损失。该技术的灵活性在于可以使用相位编码梯度的任何幅度或频率的振荡。这项技术被用于不同的频率和幅度，并提供了以标准2DFT技术所需时间的一半和四分之一获得的图像。这些图像表明，在相同的条件下，混合技术和2DFT技术可以产生类似的分辨率和对比度。
The time taken to collect high-resolution and high signal-to-noise (S/N) data in magnetic resonance (MR) imaging may be the limiting factor in patient throughput and in reducing patient motion. A hybrid fast-scan technique combining static and oscillatory phase-encoding gradients from two-dimensional Fourier transform (2DFT) and echo-planar imaging can reduce the time needed to collect data at the expense of loss in S/N. The flexibility of this technique is that any amplitude or frequency of oscillation of the phase-encoding gradient can be used. The technique was used for different frequencies and amplitudes, and images are presented that were acquired in one-half and one-quarter the time required with standard 2DFT techniques. The images illustrate that the hybrid and 2DFT techniques produce comparable resolution and contrast under identical conditions.