초록 ▼

Coronary arteries are imaged using a cardiac gated, 3DFT fast gradient recalled echo MRA pulse sequence. A scout scan is performed to measure motion during a cardiac or respiratory cycle and a quiescent period of minimal artery motion is identified. Image data is acquired during a succession of card

Coronary arteries are imaged using a cardiac gated, 3DFT fast gradient recalled echo MRA pulse sequence. A scout scan is performed to measure motion during a cardiac or respiratory cycle and a quiescent period of minimal artery motion is identified. Image data is acquired during a succession of cardiac cycles, and the view order is selected to sample the center of k-space during the quiescent period of each cardiac and or respiratory cycle to reduce motion artifacts.

대표청구항 ▼

[What is claimed is:] [1.]a) performing a scout scan using an NMR pulse sequence to measure movement of the arteries during a cardiac cycle;b) identifying a quiescent period during the cardiac cycle in which the measured artery movement is minimal; andc) acquiring the views from which an image is re

[What is claimed is:] [1.]a) performing a scout scan using an NMR pulse sequence to measure movement of the arteries during a cardiac cycle;b) identifying a quiescent period during the cardiac cycle in which the measured artery movement is minimal; andc) acquiring the views from which an image is reconstructed using the MRA pulse sequence over a succession of cardiac cycles, and arranging the view order in this acquisition such that the views which sample a central region of k-space are acquired during the quiescent periods of the cardiac cycles and views which sample peripheral regions of k-space are acquired during portions of the cardiac cycles outside the quiescent periods of the cardiac cycles.