Is three-dimensional computed tomography reconstruction justified before endovascular aortic aneurysm repair?

Abstract

The interobserver agreement in planning EVAR is significantly better with MMS CT compared with traditional axial CT. The routine use of MMS CT appears justified before EVAR to improve the accuracy and consistency of patient selection.

Ultrasound-determined diameter measurements are more accurate than axial computed tomography after endovascular aortic aneurysm repair

“…6,11,14 Furthermore, advent of 3-D reconstruction of CT scans allows digital correction of aortic angulation, thus providing the diameter measurement perpendicular to the aortic centerline. 10,11,14 Our study incorporated these considerations by comparing minor axis measurements in conventional CT scans and centerline major axis measurements in 3-D reconstruction CT images.…”

“…[5][6][7][8] Specifically, axial images on the CT scans may overestimate the true aortic diameter caused by the oblique cut of the images relative to the angle of the aorta. 9,10 Various proposed methods to minimize such error include using calipers while taking measurements, having fewer radiologists and surgeons reading CT scans, and taking the minor axis diameter measurement on a CT slice. [8][9][10] Duplex ultrasound (DUS) imaging is a noninvasive modality that may be a useful alternative to CT scans for post-EVAR surveillance.…”

“…9,10 Various proposed methods to minimize such error include using calipers while taking measurements, having fewer radiologists and surgeons reading CT scans, and taking the minor axis diameter measurement on a CT slice. [8][9][10] Duplex ultrasound (DUS) imaging is a noninvasive modality that may be a useful alternative to CT scans for post-EVAR surveillance. It has been proposed that ultrasound technologists can correct for the angulation error seen in CT scan measurements by placing the US probe perpendicular to the course of the aorta.…”

The influence of thrombus, calcification, angulation, and tortuosity of attachment sites on the time to the first graft-related complication after endovascular aneurysm repair

“…11 In particular, qualitative and quantitative assessment of thrombus, calcification, and tortuosity becomes feasible. 11,12 The aim of this study was to investigate how strongly, if at all, these factors are associated with graft-related complications using computed tomography (CT) scan core laboratory data from the United Kingdom EVAR trials.…”

Huge ruptured aneurysm of the abdominal aorta

“…(4,10). The emergency of the situation, comorbidities, variations in the anatomy of the abdominal organs due to the large amount of blood in the abdomen in the development of AAA, as well as difficulties caused by the surgical access coupled with damage to the cardiovascular and urinary systems result in mortality rate of about 50% as reported by various authors.…”