Vascular anatomy can be more accurately assessed from an endoluminal p
osition applying the principles of conventional ultrasound. It may eff
ectively batter select patients for endovascular procedures and comple
ment the information gained from CT, MRA, transcutaneous ultrasound, a
nd contrast angiography Three-dimensional and longitudinal grey-scale
reconstruction of tomographic NUS images are made available through co
mputer software programs. Information gained includes: plaque characte
rization and morphology, a cross-sectional evaluation of stenoses, ass
essment of the impact/effect of balloon angioplasty, evaluation of ves
sel dissections and the ability to selectively place intravascular ste
nts.