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Common carotid artery bifurcation: evaluation with spiral CT. Work in progress
R B Schwartz1, K M Jones, D M Chernoff
1Department of Radiology, Brigham and Women's Hospital, Harvard Medical School.
Radiology
|November 1, 1992
Summary
Spiral computed tomography (CT) accurately evaluates carotid artery stenosis, showing high correlation with conventional angiography, ultrasound, and MR angiography. This technique aids in preoperative assessment of the carotid bifurcation.
Area of Science:
- Medical Imaging
- Radiology
- Vascular Surgery
Background:
- Carotid artery stenosis is a significant risk factor for stroke.
- Accurate imaging is crucial for diagnosis and treatment planning.
Purpose of the Study:
- To assess the diagnostic utility of spiral computed tomography (CT) for carotid artery stenosis.
- To compare spiral CT findings with conventional angiography, ultrasound (US), and magnetic resonance (MR) angiography.
Main Methods:
- Spiral CT scans of 20 patients were analyzed.
- Results were compared against conventional angiography (20 patients), US (15 patients), and MR angiography (6 patients).
- Stenosis was categorized as mild, moderate, severe, or occlusion.
Main Results:
- Spiral CT demonstrated high correlation with conventional angiography (92%), US (97%), and MR angiography (100%).
- The technique accurately delineated calcifications and large ulcers.
- Spiral CT provided clear anatomic depiction of the carotid bifurcation.
Conclusions:
- Spiral CT is a valuable tool for evaluating carotid artery stenosis.
- Its accuracy and ability to visualize the carotid bifurcation support its use in preoperative assessments.
- Image postprocessing is necessary to remove artifacts like bone and calcifications.