CT after Endovascular Repair of Abdominal Aortic Aneurysms: Diagnostic Accuracy of Diameter Measurements for the Detection of Aneurysm Sac Enlargement

Schnitzbauer, Michael; Güntner, O; Wohlgemuth, Walter A.; Zeman, Florian; Haimerl, Michael; Stroszczynski, Christian; Müller-Wille, René

doi:10.1016/j.jvir.2017.09.012

Cited by 12 publications

(7 citation statements)

References 26 publications

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“…These findings might be partially influenced by the methodologies used to calculate diameter and volume. A number of different methods to calculate aortic diameter were used, for example, orthogonal and axial planes, antero–posterior, leading edge to leading edge, inner to inner, and outer to outer measurements [ 5 , 9 , 17 , 18 , 19 , 24 , 30 ]. It is important to highlight the lack of a standardized way to measure AAA volume.…”

Section: Discussionmentioning

confidence: 99%

Abdominal Aortic Aneurysm Diameter versus Volume: A Systematic Review

et al. 2023

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Recently, AAA volume measurement has been proposed as a potentially valuable surveillance method in situations when diameter measurement might fail. Objective: The aim of this systematic review was to analyze the results of previous studies comparing AAA diameter and volume measurements. Methods: A systematic search in PubMed, Cochrane, and EMBASE databases was performed to identify studies investigating the use of diameter and volume measurements in AAA diagnosis and prognosis in English, German, and Russian, published until December 2022. The manuscripts were reviewed by three researchers and scored on the quality of the research using MINORS criteria. Results: After screening 752 manuscripts, 19 studies (n = 1690) were included. The majority (n = 17) of the manuscripts appeared to favor volume. It is, however, important to highlight the heterogeneity of methodologies and lack of standardized protocol for measuring both volume and diameter in the included studies, which hindered the interpretation of the results. Conclusions: The clinical relevance of abdominal aortic aneurysm volume measurement is still unclear, although studies show favorable and promising results for volumetric changes in AAA, especially in follow-up after EVAR.

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Section: Discussionmentioning

confidence: 99%

Abdominal Aortic Aneurysm Diameter versus Volume: A Systematic Review

et al. 2023

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“…The use of volume measurements in addition to diameter measurements for detection of aneurysm growth has been a topic of interest in multiple vascular territories. Literature on abdominal aortic aneurysms showed that volumetric measurements may be superior to conventional diameter measurements for detecting size changes as a follow-up tool after endovascular repair 14,15 , as well as untreated aneurysm surveillance 16 . In intracranial aneurysms, a moderate correlation of volume and diameter at best was only found in predominantly saccularly shaped aneurysms, and not at all in fusiform aneurysms 17 .…”

Section: Discussionmentioning

confidence: 99%

Volumetric assessment of extracranial carotid artery aneurysms

Vries

Laarhoven

Kuijf

et al. 2019

Sci Rep

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The extracranial carotid artery aneurysm (ECAA) is a rare pathology for which clinical treatment guidelines are lacking. In general, symptoms or growth of the aneurysm sac are thought to indicate intervention. ECAAs may present in a large variety of shapes and sizes, and conventional diameter measurements fail to indicate geometrical differences. Therefore, we propose a protocol to measure ECAA size by 3D volumetric assessment. The volumes of 40 ECAAs in computed tomography angiography (CTA) images were measured through manual segmentation, by two independent operators. Volumes of the entire internal carotid artery (ICA) and the ECAA were measured separately. Excellent inter- and intraoperator reliability was found for both ICA and ECAA volumes, with all intraclass correlation coefficients above 0.94. Bland-Altman analysis revealed normal differences for both inter- and intraoperator agreement. For all volumes, similarity of the segmentations was excellent. Outliers were explained by presence of intraluminal ECAA thrombus, which hampered identification of the aneurysm outer wall. These results implicate robustness of our protocol, which is designed as a step-up towards (semi)automatic volumetric measurements to monitor patients with ECAA. Future (semi)automatic volumetric assessments are recommended and such techniques can be developed and validated using the proposed protocol and manual reference segmentations.

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“…Several predictive models of post-EVAR complications have been proposed, which would allow the adjustment of surveillance, according to individual risk [6][7][8]. Moreover, a few recent studies have suggested that aneurysm sac volume measurement is a more accurate method to identify patients requiring vigilant follow-up or reintervention than conventional assessment of maximum aneurysm diameter [9,10]. Nevertheless, not all factors influencing aneurysm sac behaviour and outcomes after endovascular procedure are clear.…”

Section: Introductionmentioning

confidence: 99%

Aortic sac enlargement after endovascular aneurysm repair: volume-related changes and the impact of intraluminal thrombus

Skrebūnas¹,

Lengvenis²,

Builytė³

et al. 2019

Pol J Radiol

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Purpose: Abdominal aortic aneurysm (AAA) growth after endovascular aneurysm repair (EVAR) is still unpredictable. The issue of optimal frequency of computed tomography angiography for surveillance and its measurement method accuracy remain unclear. We aimed to assess the value of abdominal aneurysm sac volume measurement for detecting expansions and the association of preprocedural intraluminal thrombus (ILT) volume with aneurysm sac growth following EVAR. Material and methods:A total of 107 patients underwent elective EVAR. Inclusion criteria provided a cohort of 39 patients. Changes of postoperative maximum aneurysm sac diameter and AAA volume were calculated. Volumetric AAA changes and demographic data of the cases with clinically irrelevant AAA diameter enlargement were evaluated. Preoperative ILT volumes were collected. ILT and AAA sac volume ratio was calculated. Statistical data analysis was performed using standard methods. Results:The mean changes of maximum AAA diameter and volume in percentage after EVAR were -5.08 ± 8.20 mm and -13.39 ± 23.32%, respectively. A moderate positive linear correlation between those changes was found (R 2 = 0.731; p < 0.0001). The mean relative AAA volume increase in cases without clinically relevant diameter enlargement was 11.50 ± 8.27%. The means of ILT and AAA sac ratios were 0.59 ± 0.17 and 0.52 ± 1.8 in growing AAA sac and in stable or shrinking AAA sac groups, respectively (p = 0.308). Conclusions:Volumetric AAA measurement may be useful as an additional method to diameter measurement after EVAR to identify clinically relevant sac growth. Preoperative volume of ILT may not significantly affect the growth rate of AAA after EVAR.

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CT after Endovascular Repair of Abdominal Aortic Aneurysms: Diagnostic Accuracy of Diameter Measurements for the Detection of Aneurysm Sac Enlargement

Cited by 12 publications

References 26 publications

Abdominal Aortic Aneurysm Diameter versus Volume: A Systematic Review

Abdominal Aortic Aneurysm Diameter versus Volume: A Systematic Review

Volumetric assessment of extracranial carotid artery aneurysms

Aortic sac enlargement after endovascular aneurysm repair: volume-related changes and the impact of intraluminal thrombus

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