Abdominal aortic aneurysm morphology: CT features in patients with ruptured and nonruptured aneurysms.

Siegel, Cary; Cohan, Richard H.; Korobkin, Melvyn; Alpern, Mathew; Courneya, Daniel L.; Leder, Richard A.

doi:10.2214/ajr.163.5.7976888

Cited by 136 publications

(72 citation statements)

References 7 publications

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“…Careful examination of the morphology of the aneurysm may aid in detecting subtle ruptures. In a retrospective study (Siegel, Cohan et al 1994) that evaluated CT scans of patients with ruptured and non ruptured abdominal aortic aneurysms to determine whether a number of morphologic features were associated with rupture, the length of the aneurysm was not significantly different between the rupture and control groups. The ruptured aneurysms had significantly larger anteroposterior and transverse dimensions.…”

Section: Imaging For Rupturementioning

confidence: 99%

“…Thrombus calcification was seen more commonly in non ruptured aneurysms, which was thought to be related to the greater amount of thrombus in the non ruptured aneurysms. Attenuation characteristics of the thrombus that were not associated with rupture included the homogeneous, diffusely heterogeneous, and low-attenuation periluminal halo patterns (Siegel, Cohan et al 1994). High-attenuation crescents within the mural thrombus were seen only in ruptured aneurysms (Siegel, Cohan et al 1994).…”

Section: Imaging For Rupturementioning

confidence: 99%

“…Attenuation characteristics of the thrombus that were not associated with rupture included the homogeneous, diffusely heterogeneous, and low-attenuation periluminal halo patterns (Siegel, Cohan et al 1994). High-attenuation crescents within the mural thrombus were seen only in ruptured aneurysms (Siegel, Cohan et al 1994). Mural calcification patterns were also evaluated, and a focal discontinuity in otherwise circumferential calcification was rare and seen only in ruptured aneurysms.…”

Section: Imaging For Rupturementioning

confidence: 99%

“…Mural calcification patterns were also evaluated, and a focal discontinuity in otherwise circumferential calcification was rare and seen only in ruptured aneurysms. It was noted, however, that mural calcification was often discontinuous, and the discontinuity was most useful when shown to be new compared with a prior scan (Siegel, Cohan et al 1994).…”

Section: Imaging For Rupturementioning

confidence: 99%

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Diagnosis of Aortic Aneurysm

Wijeyaratne¹

2011

Diagnosis, Screening and Treatment of Abdominal, Thoracoabdominal and Thoracic Aortic Aneurysms

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Section: Imaging For Rupturementioning

confidence: 99%

Section: Imaging For Rupturementioning

confidence: 99%

Section: Imaging For Rupturementioning

confidence: 99%

Section: Imaging For Rupturementioning

confidence: 99%

See 2 more Smart Citations

Diagnosis of Aortic Aneurysm

Wijeyaratne¹

2011

Diagnosis, Screening and Treatment of Abdominal, Thoracoabdominal and Thoracic Aortic Aneurysms

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“…However, in patients with CAD and local high-grade stenosis or occlusion, mechanical recanalization is a potentially more efficient option to consider [14,15]. The crescent sign was described in the aorta as a cap of hyperattenuating thrombus material suggesting acute or impending dissection [16]. It was also described on T1w images in subacute dissection of the vertebral and internal carotid arteries [17].…”

mentioning

confidence: 99%

The Subpetrous Carotid Wall Hematoma: A Sign of Spontaneous Dissection of the Internal Carotid Artery on Non-Enhanced Computed Tomography – A Retrospective Study

Jensen‐Kondering

Huhndorf

Madjidyar

et al. 2014

Fortschr Röntgenstr

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Purpose: Spontaneous dissection of the internal carotid artery (CAD) is an increasingly recognized cause for stroke especially in young and middle-aged patients. We hypothesized that non-enhanced cranial computed tomography (NECCT) can visualize the subpetrous carotid wall hematoma and thus enable identification of patients with CAD. Materials and Methods: We retrospectively reviewed patients with confirmed CAD?(n?=?21) and a control group with ischemic symptoms but without CAD?(n?=?42) who received NECCT at admission. Two independent neuroradiologists rated the presence and shape of SPH, density and diameter of the subpetrous internal carotid artery. Additionally, we correlated the shape of the subpetrous carotid wall hematoma with the grade of stenosis on subsequent angiographic imaging. Results: The subpetrous carotid wall hematoma was present in 14 of 21 patients (Cohen?s ??=?0.67). Mean diameter was 6.95???1.05?mm in dissected vessels and 5.71???1.52?mm in the contralateral vessel (p?

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Association of vortical structures and hemodynamic parameters for regional thrombus accumulation in abdominal aortic aneurysms

Zambrano

Gharahi

Lim

et al. 2021

Numer Methods Biomed Eng

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The intraluminal thrombus (ILT) has been shown to negatively impact the progression of the abdominal aortic aneurysms (AAAs). The formation of this thrombus layer has been connected to the local flow environment within AAAs, but the specific mechanisms leading to thrombus formation are still not fully understood. Our study investigated the association between vortical structures, near‐wall hemodynamic metrics (e.g., time averaged wall shear stress (TAWSS) and oscillatory shear index (OSI)), and ILT accumulation in a longitudinal cohort of 14 AAAs (53 scans total). Vortices and hemodynamic parameters were estimated using hemodynamic simulations performed to each scan of each patient and compared to local 3D changes of ILT thickness between two consecutive scans (ΔILT). Results showed that vortices formed and remained strong and close to the lumen surface in AAAs without an ILT, while in AAAs with ILTs these detached from the lumen surface and dissipated nearby wall region where an increase in ILT thickness was observed. Although low TAWSS was observed in regions with and without ILT accumulation, an inverse correlation between ∆ILT and TAWSS was observed within the regions that experienced a thrombus growth. Our results support the idea that vortical structures might be playing a role modulating ILT accumulation into specific wall regions. Also, it submits the idea that the low TAWSS will be modulating the growth of thrombus within these preferred ILT accumulated regions.

show abstract

Abdominal aortic aneurysm morphology: CT features in patients with ruptured and nonruptured aneurysms.

Cited by 136 publications

References 7 publications

Diagnosis of Aortic Aneurysm

Diagnosis of Aortic Aneurysm

The Subpetrous Carotid Wall Hematoma: A Sign of Spontaneous Dissection of the Internal Carotid Artery on Non-Enhanced Computed Tomography – A Retrospective Study

Association of vortical structures and hemodynamic parameters for regional thrombus accumulation in abdominal aortic aneurysms

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