Farzaneh F, Riederer S J, Lee J N, Tasciyan T, Wright R C, Spritzer C E
Department of Radiology, Duke University Medical Center, Durham, NC.
Radiology. 1989 May;171(2):545-9. doi: 10.1148/radiology.171.2.2704822.
Magnetic resonance (MR) fluoroscopy is a method for high-speed MR image acquisition with the goals of short acquisition time per image (500 msec or less), high image rate (10 images or more per second), and high-speed image reconstruction (150 msec or less from data acquisition to image display). The authors present their results with the first two goals in volunteers. MR fluoroscopic image data were acquired with a limited flip angle pulse sequence with reduced repetition times (TRs) and fewer phase encodings used per image. The sequence was applied continuously, and images were formed by updating one set of data with data from the most recently taken measurements. Sample head images were generated with TR/echo times as small as 11/5.5 msec and 48 phase encodings for a total acquisition time of about 500 msec. Images were acquired while the volunteer flexed his head. Artifacts from the motion became less evident on images as progressively shorter acquisition times were used.
磁共振（MR）透视是一种用于高速MR图像采集的方法，其目标是每张图像的采集时间短（500毫秒或更短）、图像速率高（每秒10张或更多图像）以及高速图像重建（从数据采集到图像显示为150毫秒或更短）。作者展示了他们在志愿者身上实现前两个目标的结果。MR透视图像数据是使用有限翻转角脉冲序列采集的，该序列具有减少的重复时间（TRs）且每张图像使用的相位编码较少。该序列持续应用，图像通过用最近采集的测量数据更新一组数据来形成。样本头部图像是在TR/回波时间低至11/5.5毫秒且有48个相位编码的情况下生成的，总采集时间约为500毫秒。在志愿者头部弯曲时采集图像。随着使用的采集时间逐渐缩短，运动产生的伪影在图像上变得不那么明显。
