Detection of coronary stenoses by multidetector computed tomography: it's all about resolution.

oninvasive imaging of the coronary arteries is fraught with reat difficulties: Most obviously, coronary vessels have mall dimensions, which requires high spatial resolution. lso, they are subjected to rapid motion because of cardiac ontraction. Sufficient temporal resolution is thus necessary o avoid artifacts. Finally, in invasive angiography, the oronary artery lumen can be selectively filled with a high oncentration of contrast agent, whereas this is not possible n noninvasive imaging. Any contrast agent given will herefore also enhance the lumen of the blood pool (e.g. the eft ventricle). This makes any form of projectional imaging iffcult and poses a severe obstacle for such attemps, for xample, the otherwise-elegant principle of dichromatic