[Aneurysmal disease. Initial clinical experience with spiral computerized tomography angiography]

Area of Science:

• Radiology
• Medical Imaging
• Vascular Surgery

Background:

• Aneurysms require accurate diagnosis and characterization for effective treatment planning.
• Comparing advanced imaging modalities is crucial for improving diagnostic capabilities.
• CT angiography (CTA) and digital subtraction angiography (DSA) are key diagnostic tools for aneurysms.

Purpose of the Study:

• To comparatively assess the diagnostic capabilities of CTA and DSA in various aneurysm locations.
• To evaluate the effectiveness of different CTA post-processing techniques (MPR, SSD, MIP) in aneurysm assessment.
• To compare the diagnostic accuracy of CTA reconstructions against axial CTA and DSA.

Main Methods:

• A series of 20 patients with aneurysms were included in the study.
• CTA was performed with intravenous contrast, followed by 2D and 3D image reconstructions (MPR, SSD, MIP).
• Diagnostic accuracy was assessed by comparing CTA techniques with axial CTA and DSA, focusing on semiologic patterns and collateral vessel involvement.

Main Results:

• MPR and MIP techniques demonstrated superior results in assessing aneurysm extent and neck.
• MPR excelled in depicting thrombus and the relationship between aneurysms and adjacent structures.
• MIP was effective for visualizing calcifications and collateral vessel involvement in abdominal aortic aneurysms.
• SSD provided good assessment of the aneurysm neck and longitudinal extent but was limited for other variables.

Conclusions:

• CTA, particularly with MPR and MIP reconstructions, offers valuable diagnostic information for aneurysms.
• MPR and MIP techniques provide complementary information, enhancing the comprehensive evaluation of aneurysms.
• CTA post-processing techniques significantly influence the diagnostic accuracy and characterization of aneurysms compared to DSA.