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Intravascular ultrasound imaging: in vitro validation and pathologic correlation
R A Nishimura1, W D Edwards, C A Warnes
1Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic, Rochester, Minnesota 55905.
Journal of the American College of Cardiology
|July 1, 1990
Summary
Intravascular ultrasound imaging provides high-resolution arterial wall images. This method accurately measures luminal areas, correlating well with histopathology, aiding in understanding arterial wall composition.
Area of Science:
- Cardiovascular imaging
- Medical ultrasound
- Arterial wall analysis
Background:
- Intravascular ultrasound (IVUS) imaging is an emerging technique for visualizing the arterial wall.
- High-resolution imaging is achieved using a catheter placed directly within an artery.
Purpose of the Study:
- To validate the accuracy of IVUS for luminal area measurements.
- To compare IVUS findings with histopathological data in peripheral arteries.
- To identify and characterize ultrasound patterns of the arterial wall.
Main Methods:
- An in vitro Plexiglas well model was used to validate luminal area measurements.
- One hundred thirty segments of fresh peripheral arteries were imaged using IVUS.
- IVUS findings were compared with corresponding histopathologic sections.
Main Results:
- Excellent correlation was found between IVUS and in vitro model measurements.
- Luminal areas measured by IVUS showed strong correlation with histopathology (r = 0.98).
- Three distinct ultrasound patterns of the arterial wall were identified, related to media and adventitia composition.
Conclusions:
- IVUS is a validated method for accurate luminal area measurement in peripheral arteries.
- IVUS patterns provide insights into arterial wall composition.
- Calcified plaque can obscure underlying structures, and differentiation of atherosclerotic plaque from media requires further investigation.