Imaging Techniques for Diagnosis of Thoracic Aortic Atherosclerosis

Klomp, Wouter W. Jansen; Bruinsma, George J. Brandon Bravo; Hof, Arnoud W van ’t; Grandjean, Jan G.; Nierich, Arno P.

doi:10.1155/2016/4726094

Cited by 16 publications

(15 citation statements)

References 63 publications

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“…However, ultrasound imaging has a limited field-of-view (van Disseldorp et al, 2016) and the transthoracic ultrasound signal may be reflected by the rib cage and the sternum (2011). The visualization of the aortic arch may be hampered by the air-filled trachea in the transesophageal echocardiography (TEE) (Jansen Klomp et al, 2016). CT and MRI has been used for imaging thoracic aorta.…”

Section: Discussionmentioning

confidence: 99%

Estimation of in vivo mechanical properties of the aortic wall: A multi-resolution direct search approach

Liu

Liang

Sun

2018

Journal of the Mechanical Behavior of Biomedical Materials

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The patient-specific biomechanical analysis of the aorta requires in vivo mechanical properties of individual patients. Existing approaches for estimating in vivo material properties often demand high computational cost and mesh correspondence of the aortic wall between different cardiac phases. In this paper, we propose a novel multi-resolution direct search (MRDS) approach for estimation of the nonlinear, anisotropic constitutive parameters of the aortic wall. Based on the finite element (FE) updating scheme, the MRDS approach consists of the following three steps: (1) representing constitutive parameters with multiple resolutions using principal component analysis (PCA), (2) building links between the discretized PCA spaces at different resolutions, and (3) searching the PCA spaces in a ‘coarse to fine’ fashion following the links. The estimation of material parameters is achieved by minimizing a node-to-surface error function, which does not need mesh correspondence. The method was validated through a numerical experiment by using the in vivo data from a patient with ascending thoracic aortic aneurysm (ATAA), the results show that the number of FE iterations was significantly reduced compared to previous methods. The approach was also applied to the in vivo CT data from an aged healthy human patient, and using the estimated material parameters, the FE-computed geometry was well matched with the image-derived geometry. This novel MRDS approach may facilitate the personalized biomechanical analysis of aortic tissues, such as the rupture risk analysis of ATAA, which requires fast feedback to clinicians.

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Section: Discussionmentioning

confidence: 99%

Estimation of in vivo mechanical properties of the aortic wall: A multi-resolution direct search approach

Liu

Liang

Sun

2018

Journal of the Mechanical Behavior of Biomedical Materials

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“…Angiography is a gold standard for carotid angiopathy. However, it is traumatic and can cause plaque detachment, which is difficult for patients with no symptom and mild symptom to accept (16). CT and MRI were increasingly valued by patients and medical staff due to their non-invasiveness, convenience and high diagnostic accuracy (17, 18).…”

Section: Discussionmentioning

confidence: 99%

Comparison of Predictive Ability of Computed Tomography and Magnetic Resonance Imaging in Patients with Carotid Atherosclerosis Complicated with Stroke

Jiang-feng¹,

Chen²,

Yang³

et al. 2020

ijph

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Background: To investigate the characterizations of CT (computed tomography) and MRI (magnetic resonance imaging) in patients with carotid atherosclerosis. Methods: A retrospective analysis was performed on the medical records of 264 patients with carotid atherosclerosis underwent CT and MRI in Linyi Central Hospital, Linyi, China from January 2010 to January 2016. Among them, 142 patients with ischemic stroke were in experimental group (test group), another 122 patients in control group. The lumen stenosis degree, plaque fibrous cap status, calcification information and vascular plaque hemorrhage in the carotid artery fork of patients detected by CT and MRI were collected. Results: The detection rate of the plaque calcification of patients detected by MRI was lower than that detected by CT in the experimental group (P<0.05). Patients in the experimental group had higher average vascular stenosis degree detected by CT and MRI than those in the control group (P<0.01). The average vascular stenosis degree of patients detected by MRI was higher than that detected by CT in the experimental group (P<0.05). Patients in the experimental group had higher unstable fibrous cap number detected by CT and MRI than those in the control group (P<0.01). Patients in the experimental group had significantly higher number of vascular plaque small focus hemorrhage than those in the control group (P<0.05). Conclusion: Patients with carotid atherosclerotic complicated with stroke have higher plaque calcification number, vascular stenosis degree and unstable fibrous cap number. Both CT and MRI can better predict the risk of stroke.

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“…When comparing TEE, epiaortic ultrasound, and CT for imaging atherosclerosis, TEE has the advantage of being performed before incision and in real time during cannula placement. Although all three imaging modalities can provide valuable information, the choice depends on operator experience and availability [ 11 ]. TEE was chosen in this case for a number of reasons.…”

Section: Discussionmentioning

confidence: 99%

Aortic Cannulation around Grade 5 Aortic Arch Atheroma Utilizing Transesophageal Echocardiography

Vanek

Hayanga

Ellison

et al. 2020

Case Reports in Anesthesiology

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A 61-year-old male with severe aortic valve stenosis was scheduled for a minimally invasive bioprosthetic aortic valve replacement. Intraoperative transesophageal echocardiography (TEE) showed a unicuspid aortic valve and extensive aortic atheromatous disease. A large atheroma with mobile components existed near the distal aortic arch. A 17-French aortic cannula was successfully placed using TEE guidance with the tip proximal to the mobile atheroma to avoid inadvertent disruption and subsequent embolic sequelae. The patient had no evidence of perioperative stroke or other complications postoperatively. This case demonstrates one strategy to manage severe atheromatous disease intraoperatively. We also review additional management options.

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Imaging Techniques for Diagnosis of Thoracic Aortic Atherosclerosis

Cited by 16 publications

References 63 publications

Estimation of in vivo mechanical properties of the aortic wall: A multi-resolution direct search approach

Estimation of in vivo mechanical properties of the aortic wall: A multi-resolution direct search approach

Comparison of Predictive Ability of Computed Tomography and Magnetic Resonance Imaging in Patients with Carotid Atherosclerosis Complicated with Stroke

Aortic Cannulation around Grade 5 Aortic Arch Atheroma Utilizing Transesophageal Echocardiography

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