<unk>  is a catheter based system that allows physicians such as interventional cardiologists to acquire images of diseased vessels from inside the artery.<unk>  provides detailed and accurate measurements of vessel lumen morphology, vessel size, extension of diseased artery segments, vessel size and plaque characteristics. Examples of<unk>  modalities are<unk>  ultrasound (IVUS) and intracoronary optical coherence tomography (OCT or IVOCT).
Intravascular imaging
Microangiography
Digital variance angiography
Intravascular fluorescence
Digital subtraction angiography
Intravascular ultrasound
Venography
Angioscopy