首页>
外国专利>
Gated time-resolved contrast-enhanced 3D MR angiography
Gated time-resolved contrast-enhanced 3D MR angiography
展开▼
机译:门控时间分辨对比增强3D MR血管造影
展开▼
页面导航
摘要
著录项
相似文献
摘要
A dynamic MRA study of a subject is performed using a 3D fast gradient- recalled echo pulse sequence that employs a non-selective RF excitation pulse. The frame rate of the resulting series of reconstructed images is increased by sampling a central region of k- space at a higher rate than the peripheral regions of k-space. The acquisition is gated using a cardiac trigger signal and the central region of k-space is acquired during diastole and the peripheral regions of k-space are acquired during systole. Image frames are reconstructed at each sampling of the central k- space region using the temporally nearest samples from the peripheral k- space regions. Two of the image frames are subtracted to form an MR angiogram.
展开▼