Post-EVAR aortic neck elongation: is a real phenomenon or a conformational change during the cardiac cycle?

Background: Stent-graft migration is a late-term complication of endovascular abdominal aortic aneurysm repair (EVAR). A recent published study suggests that stent graft migration could be explained only by aortic neck elongation, mimicking the appearance of distal stent graft migration. Several studies about the use of dynamic CT Angiography (CTA) in the evaluation of aortic conformation changes during the cardiac cycle demonstrate that axial aortic pulsatility exists.

Diagnostic accuracy of CT angiography in the evaluation of stenosis in lower limbs: comparison between visual score and quantitative analysis using a semiautomated 3D software.

Objective: To assess the accuracy of a semiautomated 3-dimensional (3D) computed tomographic angiography software in the evaluation of lower limb stenoses compared to reader evaluation, using digital subtraction angiography (DSA) as standard of reference.

Materials And Methods: Forty patients with peripheral vascular occlusive disease underwent both DSA and computed tomographic angiography. The vascular tree was divided into 6 segments from distal aorta to popliteal artery.

Foot CT perfusion in patients with peripheral arterial occlusive disease (PAOD): a feasibility study.

Purpose: To prospectively assess the technical feasibility and reproducibility of quantitative foot perfusion multidetector-row computed tomography (MDCT) in patients with peripheral occlusive artery disease (PAOD) and to evaluate perfusion parameters changes after endovascular treatment.

Materials And Methods: Institutional review board approval and informed patient consent were obtained. 10 patients older than 65 years (mean 74.

Multi-detector CT angiographic imaging in the follow-up of patients after endovascular abdominal aortic aneurysm repair (EVAR).

Background: Multidetector computed tomography (MDCT) angiography represents the standard of reference in the follow-up of patients after endovascular abdominal aortic aneurysm repair (EVAR), being effective in the detection of the full spectrum of possible complications on both axial and 3D images.

Methods: The purpose of this article is to review the normal CT angiography findings of the different types of stent-grafts and to describe the radiological findings of early and late complications after EVAR on axial and reconstructed images. A selection of cases of post-EVAR MDCT angiography is presented to learn the techniques most commonly used for endovascular treatment, the correct CT scanning technique to acquire the data, the full gamut of possible procedure-related complications and how these complications usually appear on CT images.

Low-dose multidetector CT angiography in the evaluation of infrarenal aorta and peripheral arterial occlusive disease.

Purpose: To investigate the ionizing radiation dose, image quality, and diagnostic performance of computed tomographic (CT) angiography of the peripheral arteries with three different CT angiographic acquisition protocols, with use of pretreatment digital subtraction angiography (DSA) as the reference standard.

Materials And Methods: The study was approved by the institutional review board and performed in agreement with the 1990 Declaration of Helsinki and subsequent amendments. Each patient provided informed consent before undergoing CT.

Aortic-neck dilation after endovascular abdominal aortic aneurysm repair (EVAR): can it be predicted?

Purpose: This study was performed to evaluate whether dynamic computed tomography (CT) can provide functional vessel information predicting outcomes of aortic neck in patients undergoing endovascular aneurysm repair (EVAR) of an abdominal aortic aneurysm (AAA).

Materials And Methods: Twenty patients with and 20 without AAA were enrolled. Electrocardiographically (ECG)-gated data sets were acquired with a 64-slice CT scanner.

CT angiography in stent-graft sizing: impact of using inner vs. outer wall measurements of aortic neck diameters.

Purpose: To assess the impact of using inner wall vs. outer wall measurements on stent-graft sizing for endovascular repair of abdominal aortic aneurysm (AAA).

Methods: Preoperative static and electrocardiographically-gated 64-slice computed tomographic angiography (CTA) datasets were acquired on 40 consecutive AAA patients (29 men; mean age 78.

Proximal aneurysmal neck: dynamic ECG-gated CT angiography--conformational pulsatile changes with possible consequences for endograft sizing.

Purpose: To assess the magnitude of variations in size of the proximal neck of the abdominal aortic aneurysm (AAA) in patients selected to undergo endovascular abdominal aortic aneurysm repair (EVAR) and the potential effect on choice of endograft diameter by using 64-section dynamic electrocardiographically (ECG)-gated computed tomographic (CT) angiography.

Materials And Methods: A prospective single-center study was performed in 40 patients with AAA who underwent both static and dynamic ECG-gated CT angiography. The ethical conduct of the study was approved by the departmental review board, and all patients provided written informed consent.