scholarly journals Simultaneous Aortic and Coronary Assessment in Abdominal Aortic Aneurysm Patients by Thoraco-abdominal 64-Detector-row CT Angiography: Estimate of the Impact on Preoperative Management: A Pilot Study

2010 ◽  
Vol 40 (2) ◽  
pp. 196-201 ◽  
Author(s):  
R.P.J. Budde ◽  
F. Huo ◽  
M.J.M. Cramer ◽  
P.A.F.M. Doevendans ◽  
M.L. Bots ◽  
...  
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Pilot Study ◽  
Aortic Aneurysm ◽  
Ct Angiography ◽  
Preoperative Management ◽  
Abdominal Aortic ◽  
The Impact

Stereoscopically Observed Deformations of a Compliant Abdominal Aortic Aneurysm Model

2011 ◽  
Vol 133 (11) ◽  
Author(s):  
Clark A. Meyer ◽  
Eric Bertrand ◽  
Olivier Boiron ◽  
Valérie Deplano
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Computational Models ◽  
Imaging System ◽  
Strain Differences ◽  
Cyclic Strain ◽  
Experimental Models ◽  
Body Motion ◽  
Abdominal Aortic ◽  
The Impact

A new experimental setup has been implemented to precisely measure the deformations of an entire model abdominal aortic aneurysm (AAA). This setup addresses a gap between the computational and experimental models of AAA that have aimed at improving the limited understanding of aneurysm development and rupture. The experimental validation of the deformations from computational approaches has been limited by a lack of consideration of the large and varied deformations that AAAs undergo in response to physiologic flow and pressure. To address the issue of experimentally validating these calculated deformations, a stereoscopic imaging system utilizing two cameras was constructed to measure model aneurysm displacement in response to pressurization. The three model shapes, consisting of a healthy aorta, an AAA with bifurcation, and an AAA without bifurcation, were also evaluated with computational solid mechanical modeling using finite elements to assess the impact of differences between material properties and for comparison against the experimental inflations. The device demonstrated adequate accuracy (surface points were located to within 0.07 mm) for capturing local variation while allowing the full length of the aneurysm sac to be observed at once. The experimental model AAA demonstrated realistic aneurysm behavior by having cyclic strains consistent with reported clinical observations between pressures 80 and 120 mm Hg. These strains are 1–2%, and the local spatial variations in experimental strain were less than predicted by the computational models. The three different models demonstrated that the asymmetric bifurcation creates displacement differences but not cyclic strain differences within the aneurysm sac. The technique and device captured regional variations of strain that are unobservable with diameter measures alone. It also allowed the calculation of local strain and removed rigid body motion effects on the strain calculation. The results of the computations show that an asymmetric aortic bifurcation created displacement differences but not cyclic strain differences within the aneurysm sac.

Complete pre-operative imaging assessment of abdominal aortic aneurysm with spiral CT angiography

1997 ◽  
Vol 52 (5) ◽  
pp. 369-377 ◽  
Author(s):  
M.L. Errington ◽  
J.M. Ferguson ◽  
I.N. Gillespie ◽  
H.M. Connell ◽  
C.V. Ruckley ◽  
...  
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Ct Angiography ◽  
Spiral Ct ◽  
Abdominal Aortic ◽  
Spiral Ct Angiography

scholarly journals Correction to: The potential of cardiac rehabilitation as a method of suppressing abdominal aortic aneurysm expansion: a pilot study

2019 ◽  
Vol 34 (12) ◽  
pp. 2040-2040
Author(s):  
Atsuko Nakayama ◽  
Eisuke Amiya ◽  
Hiroyuki Morita ◽  
Kanako Hyodo ◽  
Naoko Takayama ◽  
...  
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Pilot Study ◽  
Aortic Aneurysm ◽  
Cardiac Rehabilitation ◽  
Abdominal Aortic
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