First results of computerised tomographic angiography using electron beam tomography

Area of Science:

• Medical Imaging
• Radiology
• Cardiovascular Imaging

Background:

• Computed tomography angiography (CTA) is crucial for diagnosing vascular diseases.
• Electron beam tomography (EBT) offers rapid scanning capabilities.
• Optimizing EBT for CTA in chest and abdomen requires specific protocols and evaluation.

Purpose of the Study:

• To assess the efficacy of EBT with fast continuous volume scanning for chest and abdominal CTA.
• To establish and evaluate EBT CTA protocols for diverse clinical applications.
• To compare EBT CTA with helical CT for vascular imaging.

Main Methods:

• Utilized an Evolution XP EBT scanner with software version 12.34.
• Acquired 140 images in 17 seconds using 3-mm collimation and overlapping reconstruction.
• Evaluated the EBT CTA technique in 155 patients across five clinical applications.

Main Results:

• Achieved high and homogeneous vessel density (>240 HU in the aorta).
• Visualized all major abdominal arteries (coeliac, mesenteric, renal, lumbar).
• Demonstrated superior z-axis resolution for aneurysm and aortic branch visualization compared to helical CT.
• Showed excellent suitability for pulmonary vessel evaluation with improved contrast enhancement and shorter scan times.
• Enhanced identification of intraluminal emboli and mural thrombi.

Conclusions:

• EBT CTA is a reliable and highly suitable tool for evaluating aortic disease and pulmonary vessels.
• The technique offers advantages over helical CT, including faster scanning and improved image quality.
• EBT CTA facilitates better detection of vascular pathologies like emboli and thrombi.