Multislice CT angiography in the follow-up of fenestrated endovascular grafts: Effect of slice thickness on 2D and 3D visualization of the fenestrated stents
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Purpose: To investigate the effect of multislice computed tomography (CT) protocols on the visualization of target vessel stents in patients with treated with fenestrated endovascular grafts.Methods: Twenty-one patients (19 men; mean age 75 years, range 63?86) undergoing fenestrated endovascular repair of abdominal aortic aneurysm (AAA) were retrospectively studied. Multislice CT angiography was performed with several protocols, and the section thicknesses used in each were compared to identify any relationship between slice thickness and target vessel stents visualized on 2-dimensional (2D) axial, multiplanar reformatted (MPR), and 3-dimensional (3D) virtual intravascular endoscopy (VIE) images. Image quality was assessed based on the degree of artifacts and their effect on the ability to visualize the configuration, intra-aortic location, and intraluminal appearance of the target vessel stents and measure their protrusion into the aortic lumen.Results: There were 7 different multislice CT scanning protocols employed in the 21 patients (25 datasets, with 2 sets of follow-up images in 4 patients). The slice thicknesses and numbers (n) of studies included were 0.5 (n=3), 0.625 (n=6), 1.0 (n=1), 1.25 (n=9), 2.5 (n=3), 3.0 (n=1), and 5.0 mm (n=2). Of these CT protocols, images (especially 2D/3D reconstructions) acquired at 2.5, 3.0, and 5.0 mm were significantly compromised by interference from artifacts. Images acquired with a slice thickness of 1.0 or 1.25 mm were scored equally or lower than those acquired with a submillimeter section thickness (0.5 or 0.625 mm), with minor degrees of artifacts resulting in acceptable image quality.Conclusion: Visualization of the target vessel stents depends on the appropriate selection of multislice CT scanning protocols. Our results showed that studies performed with a slice thickness of 1.0 or 1.25 mm produced similar image quality to those with a thickness of 0.5 or 0.625 mm. Submillimeter slices are not recommended in imaging patients treated with fenestrated stent-grafts, as they did not add additional information to the visualization.
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Multislice CT angiography in the visualization of fenestrated endovascular grafts: Effect of slice thickness on 2D and 3D visualization of the fenestrated vessel stentsSun, Zhonghua; Allen, Yvonne; Hartley, D.; Lawrence-Brown, M. (2008)The aim of this study was to investigate the effect of multislice CT scanning protocol on the visualization of fenestrated vessel stents in patients with abdominal aortic aneurysms (AAA) treated with fenestrated endovascular ...
Sun, Zhonghua; Mwipatayi, B.; Allen, Yvonne; Hartley, D.; Lawrence-Brown, M. (2008)Objective: The purpose of this article is to provide 2D and 3D imaging appearances of fenestrated endovascular repair of abdominal aortic aneurysms (AAA) based on multislice CT angiography.Methods and Results: 14 patients ...
Sun, Zhonghua; Allen, Yvonne; Sanjay, N.; Knight, R.; Hartley, D.; Lawrence-Brown, M. (2008)Purpose: To report the diagnostic value of computed tomographic (CT) virtual intravascular endoscopy (VIE) in the assessment of patients with abdominal aortic aneurysm (AAA) treated with fenestrated endovascular grafts.Methods: ...