MRI of the Coronary Arteries
نویسنده
چکیده
The critical issue for coronary MRA is to account for multiple sources of motion while maintaining a high spatial resolution and high temporal resolution acquisition. Under optimal circumstances, the spatial resolution of coronary MRA is 700-900 microns for in plane resolution, but slice thickness z-axis) remains at 2-3 mm. This is considerably greater than the 300 micron resolution available from invasive angiography. Besides bulk cardiac motion that is commonly observed with functional studies of the left ventricle, the right and left coronary arteries have complex motion paths influenced by the atria as well as ventricles. Because the heart rests on the diaphragm, bulk cardiac motion related to respiration must be eliminated during the acquisition. Technical factors related to coronary acquisitions are discussed further below.
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