Title :
Phase-contrast magnetic resonance angiography
Author :
Souza, Steven P. ; Dumoulin, Charles L.
Author_Institution :
General Electric Res. & Dev. Center, Schenectady, NY, USA
Abstract :
The theory of phase-contrast magnetic resonance (MR) flow imaging is discussed. A formula for the velocity-induced phase shift is given. When bipolar gradient-pulses are added to a conventional 2-D MR imaging procedure and differences between acquisitions are determined using opposite-polarity flow-encoding pulses, the stationary signal is effectively cancelled and a flow image is obtained. An example is given in which the arteries and veins of the head and neck of a healthy volunteer are shown
Keywords :
biomedical NMR; patient diagnosis; 2D NMR imaging; arteries; bipolar gradient pulses; flow image; head; healthy volunteer; medical diagnostic imaging; neck; opposite-polarity flow-encoding pulses; phase-contrast magnetic resonance angiography; stationary signal; veins; velocity-induced phase shift; Angiography; Blood flow; Magnetic field measurement; Magnetic materials; Magnetic resonance; Magnetic resonance imaging; Magnetization; Nuclear magnetic resonance; Ultrasonic imaging; X-ray imaging;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95850
