3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals

Abstract 3D free-hand ultrasound (3DFUS) is becoming increasingly popular to assist clinical gait analysis because it is cost- and time-efficient and does not expose participants to radiation. The aim of this study was to evaluate its reliability in localizing the anterior superior iliac spine (ASIS...

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Main Authors: Brian Horsak, Caterine Schwab, Sebastian Durstberger, Alexandra Thajer, Susanne Greber-Platzer, Hans Kainz, Ilse Jonkers, Andreas Kranzl
Format: Article
Language:English
Published: Nature Publishing Group 2021-05-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-021-89763-7
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spelling doaj-4e36e73400814a90b453ec99a1c13a292021-05-23T11:33:12ZengNature Publishing GroupScientific Reports2045-23222021-05-0111111210.1038/s41598-021-89763-73D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individualsBrian Horsak0Caterine Schwab1Sebastian Durstberger2Alexandra Thajer3Susanne Greber-Platzer4Hans Kainz5Ilse Jonkers6Andreas Kranzl7Institute of Health Sciences, St. Pölten University of Applied SciencesInstitute of Health Sciences, St. Pölten University of Applied SciencesLaboratory of Gait and Movement Analysis, Orthopedic Hospital Vienna-SpeisingDepartment of Pediatrics and Adolescent Medicine, Medical University of ViennaDepartment of Pediatrics and Adolescent Medicine, Medical University of ViennaDepartment of Biomechanics, Kinesiology and Applied Computer Science, University of Vienna, Center for Sports Science and University SportsDepartment of Movement Sciences, Human Movement Biomechanics Research Group, KU LeuvenLaboratory of Gait and Movement Analysis, Orthopedic Hospital Vienna-SpeisingAbstract 3D free-hand ultrasound (3DFUS) is becoming increasingly popular to assist clinical gait analysis because it is cost- and time-efficient and does not expose participants to radiation. The aim of this study was to evaluate its reliability in localizing the anterior superior iliac spine (ASIS) at the pelvis and the hip joint centers (HJC). Additionally, we evaluated its accuracy to get a rough estimation of the potential to use of 3DFUS to segment bony surface. This could offer potential to register medical images to motion capture data in future. To evaluate reliability, a test–retest study was conducted in 16 lean and 19 obese individuals. The locations of the ASIS were determined by manual marker placement (MMP), an instrumented pointer technique (IPT), and with 3DFUS. The HJC location was also determined with 3DFUS. To quantify reliability, intraclass correlation coefficients (ICCs), the standard error of measurement (SEm), among other statistical parameters, were calculated for the identified locations between the test and retest. To assess accuracy, the surface of a human plastic pelvic phantom was segmented with 3DFUS in a distilled water bath in 27 trials and compared to a 3D laser scan of the pelvis. Regarding reliability, the MMP, but especially the IPT showed high reliability in lean (SEm: 2–3 mm) and reduced reliability in obese individuals (SEm: 6–15 mm). Compared to MMP and IPT, 3DFUS presented lower reliability in the lean group (SEm: 2–4 mm vs. 2–8 mm, respectively) but slightly better values in the obese group (SEm: 7–11 mm vs. 6–16 mm, respectively). Correlations between test–retest reliability and torso body fat mass (% of body mass) indicated a moderate to strong relationship for MMP and IPT but only a weak correlation for the 3DFUS approach. The water-bath experiments indicated an acceptable level of 3.5 (1.7) mm of accuracy for 3DFUS in segmenting bone surface. Despite some difficulties with single trials, our data give further rise to the idea that 3DFUS could serve as a promising tool in future to inform marker placement and hip joint center location, especially in groups with higher amount of body fat.https://doi.org/10.1038/s41598-021-89763-7
collection DOAJ
language English
format Article
sources DOAJ
author Brian Horsak
Caterine Schwab
Sebastian Durstberger
Alexandra Thajer
Susanne Greber-Platzer
Hans Kainz
Ilse Jonkers
Andreas Kranzl
spellingShingle Brian Horsak
Caterine Schwab
Sebastian Durstberger
Alexandra Thajer
Susanne Greber-Platzer
Hans Kainz
Ilse Jonkers
Andreas Kranzl
3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals
Scientific Reports
author_facet Brian Horsak
Caterine Schwab
Sebastian Durstberger
Alexandra Thajer
Susanne Greber-Platzer
Hans Kainz
Ilse Jonkers
Andreas Kranzl
author_sort Brian Horsak
title 3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals
title_short 3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals
title_full 3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals
title_fullStr 3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals
title_full_unstemmed 3D free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals
title_sort 3d free-hand ultrasound to register anatomical landmarks at the pelvis and localize the hip joint center in lean and obese individuals
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2021-05-01
description Abstract 3D free-hand ultrasound (3DFUS) is becoming increasingly popular to assist clinical gait analysis because it is cost- and time-efficient and does not expose participants to radiation. The aim of this study was to evaluate its reliability in localizing the anterior superior iliac spine (ASIS) at the pelvis and the hip joint centers (HJC). Additionally, we evaluated its accuracy to get a rough estimation of the potential to use of 3DFUS to segment bony surface. This could offer potential to register medical images to motion capture data in future. To evaluate reliability, a test–retest study was conducted in 16 lean and 19 obese individuals. The locations of the ASIS were determined by manual marker placement (MMP), an instrumented pointer technique (IPT), and with 3DFUS. The HJC location was also determined with 3DFUS. To quantify reliability, intraclass correlation coefficients (ICCs), the standard error of measurement (SEm), among other statistical parameters, were calculated for the identified locations between the test and retest. To assess accuracy, the surface of a human plastic pelvic phantom was segmented with 3DFUS in a distilled water bath in 27 trials and compared to a 3D laser scan of the pelvis. Regarding reliability, the MMP, but especially the IPT showed high reliability in lean (SEm: 2–3 mm) and reduced reliability in obese individuals (SEm: 6–15 mm). Compared to MMP and IPT, 3DFUS presented lower reliability in the lean group (SEm: 2–4 mm vs. 2–8 mm, respectively) but slightly better values in the obese group (SEm: 7–11 mm vs. 6–16 mm, respectively). Correlations between test–retest reliability and torso body fat mass (% of body mass) indicated a moderate to strong relationship for MMP and IPT but only a weak correlation for the 3DFUS approach. The water-bath experiments indicated an acceptable level of 3.5 (1.7) mm of accuracy for 3DFUS in segmenting bone surface. Despite some difficulties with single trials, our data give further rise to the idea that 3DFUS could serve as a promising tool in future to inform marker placement and hip joint center location, especially in groups with higher amount of body fat.
url https://doi.org/10.1038/s41598-021-89763-7
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