Magnetic Resonance Imaging and Freehand 3-D Ultrasound Provide Similar Estimates of Free Achilles Tendon Shape and 3-D Geometry.

Autor:	Devaprakash D; School of Allied Health Sciences, Griffith University, Queensland, Australia; Gold Coast Orthopaedic Research Engineering and Education Alliance (GCORE), Menzies Health Institute Queensland, Griffith University, Queensland, Australia. Electronic address: daniel.devaprakash@griffithuni.edu.au., Lloyd DG; School of Allied Health Sciences, Griffith University, Queensland, Australia; Gold Coast Orthopaedic Research Engineering and Education Alliance (GCORE), Menzies Health Institute Queensland, Griffith University, Queensland, Australia., Barrett RS; School of Allied Health Sciences, Griffith University, Queensland, Australia; Gold Coast Orthopaedic Research Engineering and Education Alliance (GCORE), Menzies Health Institute Queensland, Griffith University, Queensland, Australia., Obst SJ; School of Allied Health Sciences, Griffith University, Queensland, Australia; School of Health, Medical, and Applied Sciences, Central Queensland University, Bundaberg, Queensland, Australia., Kennedy B; School of Allied Health Sciences, Griffith University, Queensland, Australia; QSCAN Radiology Clinics, Queensland, Australia., Adams KL; Australian Institute of Sport, Canberra, Australian Capital Territory, Australia., Hunter A; Australian Institute of Sport, Canberra, Australian Capital Territory, Australia., Vlahovich N; Australian Institute of Sport, Canberra, Australian Capital Territory, Australia., Pease DL; Australian Institute of Sport, Canberra, Australian Capital Territory, Australia., Pizzolato C; School of Allied Health Sciences, Griffith University, Queensland, Australia; Gold Coast Orthopaedic Research Engineering and Education Alliance (GCORE), Menzies Health Institute Queensland, Griffith University, Queensland, Australia.
Jazyk:	angličtina
Zdroj:	Ultrasound in medicine & biology [Ultrasound Med Biol] 2019 Nov; Vol. 45 (11), pp. 2898-2905. Date of Electronic Publication: 2019 Aug 27.
DOI:	10.1016/j.ultrasmedbio.2019.07.679
Abstrakt:	The purpose of this study was to assess the similarity of free Achilles tendon shape and 3-D geometry between magnetic resonance imaging (MRI) and freehand 3-D ultrasound (3-DUS) imaging methods. Fourteen elite/sub-elite middle-distance runners participated in the study. MRI and 3-DUS scans of the Achilles tendon were acquired on two separate imaging sessions, and all 3-D reconstructions were performed using identical methods. Shape similarity of free Achilles tendon reconstructed from MRI and 3-DUS data was assessed using Jaccard index, Hausdorff distance and root mean square error (RMSE). The Jaccard index, Hausdorff distance and RMSE values were 0.76 ± 0.05, 2.70 ± 0.70 and 0.61 ± 0.10 mm, respectively. The level of agreement between MRI and 3-DUS for free Achilles tendon volume, length and average cross-sectional area (CSA) was assessed using Bland-Altman analysis. Compared to MRI, freehand 3-DUS overestimated volume, length and average CSA by 30.6 ± 15.8 mm 3 (1.1% ± 0.6%), 0.3 ± 0.7 mm (0.6% ± 1.9%) and 0.3 ± 1.42 mm 2 (0.4% ± 2.0%), respectively. The upper and lower limits of agreement between MRI and 3-DUS for volume, length and average CSA were -0.4 to 61.7 mm 3 (-0.2% to 2.3%), -1.0 to 1.5 mm (-3.2% to 4.5%) and -2.5 to 3.1 mm 2 (-3.5% to 4.3%), respectively. There were no significant differences between imaging methods in CSA along the length of the tendon. In conclusion, MRI and freehand 3-DUS may be considered equivalent methods for estimating shape and 3-D geometry of the free Achilles tendon. These findings, together with the practical benefits of being able to assess 3-D Achilles tendon shape and geometry in a laboratory environment and under isometric loading, make 3-DUS an attractive alternative to MRI for assessing 3-D free Achilles tendon macro-structure in future studies. (Copyright © 2019 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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