Title :
Cardiac delay optimization for MR angiograms
Author :
Hylton, Nola M. ; Shah, Ajit
Author_Institution :
Radiologic Imaging Lab., California Univ., San Francisco, CA, USA
Abstract :
A technique is described which excites a bolus of spins in a central location of the vessel of interest and measures the distance it travels in a given time. Average velocity is then easily calculated as distance divided by time. Velocity measurements are made at 8-12 point during the cardiac cycle and plotted against time. The delay for optimal velocity can then be selected and programmed into the angiographic sequence. The total time for the time-of-flight velocity measuring technique and angiogram is approximately 8 min.<>
Keywords :
biomedical NMR; biomedical measurement; blood; cardiology; haemodynamics; MR angiograms; cardiac cycle; cardiac delay optimization; optimal velocity; time-of-flight velocity measuring technique; velocity measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94540
