Key differences between coronary angiography and IVUS ( Intra-vascular ultrasound )

Angiography shows only the silhouette of contrast media flowing through a lumen. IVUS shows us much more diagnostic information:
•Measurable extent of stent apposition and expansion.
•Measurable size and shape of lumen, plaque, intima and media.
•Shape and composition of intima, media and adventitia.
•Differentiation among fibrous, fibro-fatty and calcified plaque.
•Positive identification of blood.