Strain estimation in abdominal aortic aneurysms from 2-D ultrasound

Brekken, Reidar; Bang, Jon; Ødegård, Asbjørn; Aasland, Jenny; Hernes, Toril A. Nagelhus; Myhre, Hans O.

doi:10.1016/j.ultrasmedbio.2005.09.007

Cited by 28 publications

(27 citation statements)

References 32 publications

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“…One or two segments tended to have higher peak strain rate values than the other segments, suggesting an inhomogeneous movement of the aortic wall. To express the inhomogeneity of the aortic wall motion in AAAs, Brekken, et al 9) compared the range of strain values to the mean strain. We measured the CV of…”

Section: Patient Characteristicsmentioning

confidence: 99%

“…8) Only a few studies have used this method for AAAs; however, their procedures and analysis methodology were rather complicated and time-consuming for clinical routine surveillance. 9) We utilized software that can automatically divide the circumference into six segments and simplifi ed the methodology of the measurement. We focused on the inhomogeneity of aortic wall movement by comparing the strain or strain rate of these different segments and sought in fi nding possibilities of clinical application for this simple method.…”

Section: Introductionmentioning

confidence: 99%

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Strain Analysis of Wall Motion in Abdominal Aortic Aneurysms

Taniguchi

Hoshina

Hosaka

et al. 2014

Annals of Vascular Diseases

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Objective: In this exploratory study, we used ultrasound speckle-tracking methods, originally used for analyzing cardiac wall motion, to evaluate aortic wall motion. Materials and Methods: We compared 19 abdominal aortic aneurysm (AAA) patients with 10 healthy volunteers (diameter, 48 mm vs. 15 mm). Motion pictures of the axial view of the aneurysm using ultrasonography were analyzed. Circumferential strain and strain rate at 6 equally divided segments of the aorta were semiautomatically calculated. We termed 'peak' strain and strain rate as the maximum of strain and strain rate in a cardiac cycle for each segment. We also evaluated the coefficient of variation of peak strain rate for the six segments. Results: In the aneurysm and control groups, the mean values of peak strain along the 6 segments were 1.5% ± 0.6% vs. 4.7% ± 1.6% (p <0.0001), respectively. The coefficient of variation of the peak strain rate was higher in the AAA group (0.74 ± 0.20) than in the control group (0.56 ± 0.12; p <0.05). Conclusions: Aortic wall compliance decreased in the more atherosclerotic AAA group. The higher relative dispersion of strain rates in the AAA group is indicative of the inhomogeneous movement of the aortic wall.

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Section: Patient Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Strain Analysis of Wall Motion in Abdominal Aortic Aneurysms

Taniguchi

Hoshina

Hosaka

et al. 2014

Annals of Vascular Diseases

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“…On the other hand, ultrasound (US)-based aneurysm surveillance is a non-invasive, radiation-free, cheap and reproducible method. 9 However, there have been few US studies of the biomechanical wall properties of AAA reported in the literature, 10,11 as well as few studies showing the use of three-dimensional ultrasound (3D-US) imaging to evaluate aneurysm volume quantification. 12,13 The aim of this study was to assess the ability of the US coupled with two-dimensional (2D) speckle-tracking algorithms to evaluate biomechanical properties of the aorta in patients with and without AAA.…”

Section: Introductionmentioning

confidence: 99%

Volumetry and biomechanical parameters detected by 3D and 2D ultrasound in patients with and without an abdominal aortic aneurysm

et al. 2016

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The objective was to demonstrate the ability of ultrasound (US) with 3D properties to evaluate volumetry and biomechanical parameters of the aorta in patients with and without abdominal aortic aneurysm (AAA). Thirty-one patients with normal aortas (group 1), 46 patients with AAA measuring 3.0-5.5 cm (group 2) and 31 patients with AAA ⩾ 5.5 cm (group 3) underwent a 2D/3D-US examination of the infra-renal aorta, and the images were post-processed prior to being analyzed. In the maximum diameter, the global circumferential strain and the global maximum rotation assessed by 2D speckle-tracking algorithms were compared among the three groups. The volumetry data obtained using 3D-US from 40 AAA patients were compared with the volumetry data obtained by a contemporary computed tomography (CT) scan. The median global circumferential strain was 2.0% (interquartile range (IR): 1.0-3.0), 1.0% (IR: 1.0-2.0) and 1.0% (IR: 1.0-1.75) in groups 1, 2 and 3, respectively (p < 0.001). The median global maximum rotation decreased progressively from group 1 to group 3 (1.38º (IR: 0.77-2.13), 0.80º (IR: 0.57-1.0) and 0.50º (IR: 0.31-0.75), p < 0.001). AAA volume estimations by 3D-US correlated well with CT (R 2 = 0.76). In conclusion, US with 3D properties is non-invasive and has the potential to evaluate volumetry and biomechanical characteristics of AAA.

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“…Ultrasound strain imaging estimates local deformation of tissue due to applied load, and may therefore have a potential for better assessment and characterization of the local properties of the wall. In a study by Brekken et al (2006), 2D cross-sectional ultrasound data with high frame rate (~40-50 fps, depending on the size of the aneurysm) was used to derive patient-specific information about in-vivo elastic properties of the aneurysm wall of 10 patients. For each dataset, points were semi-automatically selected along the aneurysm circumference in one ultrasound image.…”

Section: Prediction Of Growth and Rupturementioning

confidence: 99%

“…It is noted that one part of the wall experiences elevated cyclic strain. In Brekken et al (2006), used with permission.…”

Section: Prediction Of Growth and Rupturementioning

confidence: 99%