The reproducibility of measuring maximum abdominal aortic aneurysm diameter from ultrasound images

The Ultrasound Journal - Tập 13 Số 1 - 2021
Evan O. Matthews1, Jenna Pinchbeck1, Kylie Elmore2, Rhondda Jones3, Joseph V. Moxon3,1, Jonathan Golledge3,2,1
1Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, Australia
2Department of Vascular and Endovascular Surgery, Townsville University Hospital, Townsville, Australia
3Australian Institute for Tropical Health and Medicine, James Cook University, Townsville, Australia

Tóm tắt

Abstract Background Accurate repeat assessment of the diameter of an abdominal aortic aneurysm (AAA) is important. This study investigated the reproducibility of different methods of measuring AAA diameter from ultrasound images. Methods Fifty AAA patients were assessed by ultrasound. Maximum AAA diameter was measured independently by three trained observers on two separate occasions using a standardised protocol. Five diameters were measured from each scan, three in the anterior–posterior (AP) and two in the transverse (TV) plane, including inner-to-inner (ITI), outer-to-outer (OTO) and leading edge-to-leading edge (LETLE). Intra- and inter-observer reproducibility were reported as reproducibility coefficients. Statistical comparison of methods was performed using linear mixed effects models. Results Intra-observer reproducibility coefficients (AP LETLE 2.2 mm; AP ITI 2.4 mm; AP OTO 2.6 mm) were smaller than inter-observer reproducibility coefficients (AP LETLE 4.6 mm: AP ITI 4.5; and AP OTO 4.8 mm). There was no statistically significant difference in intra-observer reproducibility of three types of measurements performed in the AP plane. Measurements obtained in the TV plane had statistically significant worse intra-observer reproducibility than those performed in the AP plane. Conclusions This study suggests that the comparison of maximum AAA diameter between repeat images is most reproducibly performed by a single trained observer measuring diameters in the AP plane.

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The Ultrasound Journal

Tập 13 Số 1

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