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Noninvasive characterization of plaque morphology using helical computed tomography
J M Estes1, W C Quist, F W Lo Gerfo
1Department of Surgery, New England Medical Center, Tufts University School of Medicine, Boston, MA 02111, USA.
The Journal of Cardiovascular Surgery
|December 2, 1998
Summary
Helical computed tomography (HCT) accurately characterizes atherosclerotic plaque composition and morphology. This noninvasive imaging technique aids in understanding plaque stability and clinical behavior.
Area of Science:
- Cardiovascular Imaging
- Medical Diagnostics
- Radiology
Background:
- Atherosclerotic plaque composition and morphology are key predictors of plaque stability and clinical outcomes.
- Noninvasive plaque characterization using duplex ultrasound has limitations.
- Helical computed tomography (HCT) was investigated for its accuracy in carotid plaque morphology assessment.
Purpose of the Study:
- To evaluate the accuracy of HCT in defining atherosclerotic plaque morphology and composition.
- To compare HCT-derived stenosis measurements with duplex ultrasound data.
Main Methods:
- Prospective enrollment of patients undergoing carotid endarterectomy.
- HCT with intravenous contrast injection to measure plaque attenuation values (Hounsfield Units).
- Correlation of HCT findings with microscopic tissue examination and duplex ultrasound measurements.
Main Results:
- HCT accurately identified plaque components like calcium, fibrous tissue, and lipid.
- HCT distinguished between lipid and fibrous stroma based on attenuation values (p<0.001).
- HCT-derived percent stenosis correlated significantly with duplex ultrasound data (p<0.001).
Conclusions:
- HCT is a precise, noninvasive method for detailed atherosclerotic plaque analysis.
- This imaging modality can be used to correlate plaque anatomy with clinical behavior.