A1 Journal article (refereed)
Identifying and assessing inter-muscular fat at the distal diaphyseal femur measured by peripheral Quantitative Computed Tomography (pQCT) (2019)


Owen, Patrick J.; Hart, Nicolas H.; Latella, Christopher; Hendy, Ashlee M.; Lamon, Séverine; Rantalainen, Timo (2019). Identifying and assessing inter-muscular fat at the distal diaphyseal femur measured by peripheral Quantitative Computed Tomography (pQCT). Journal of Clinical Densitometry, In Press. DOI: 10.1016/j.jocd.2019.11.001


JYU authors or editors


Publication details

All authors or editors: Owen, Patrick J.; Hart, Nicolas H.; Latella, Christopher; Hendy, Ashlee M.; Lamon, Séverine; Rantalainen, Timo

Journal or series: Journal of Clinical Densitometry

ISSN: 1094-6950

eISSN: 1559-0747

Publication year: 2019

Volume: In Press

Publisher: International Society for Clinical Densitometry; Elsevier Inc.

Publication country: United States

Publication language: English

DOI: http://doi.org/10.1016/j.jocd.2019.11.001

Open Access: Publication channel is not openly available


Abstract

INTRODUCTION
Inter/intramuscular fat can be assessed with peripheral Quantitative Computed Tomography (pQCT) and is of interest as an indicator of ‘muscle quality’. Typical pQCT scan sites (forearm, lower leg) have a low amount of inter/intramuscular fat, however distal diaphyseal femur scan sites with conspicuous inter/intramuscular fat have been identified as potentially more prudent scan sites, even in healthy adolescents. However, current state of the art analysis methods require labour-intensive manual segmentation of the scan. The purpose of the present study was to evaluate the reliability of a novel open source automated enclosing convex polygon approach (source code https://github.com/tjrantal/pQCT, commit cec9bce) to quantify inter/intramuscular fat from femoral pQCT scans in healthy adults.

METHODOLOGY
The distal diaphyseal femur (25% of tibial length from the knee joint towards the hip) of twenty seven adults aged 18 to 50 years were scanned twice, one week apart, using pQCT. Subcutaneous fat, muscle, inter/intramuscular fat, and marrow areas, and corresponding densities were evaluated using a method we have reported previously, as well as the novel enclosing convex polygon method.

RESULTS
The session-to-session reliability of the assessments was fair to excellent using the previously reported method as indicated by intraclass correlation coefficient (ICC2,1) ranging from 0.45 to 1.00, while the novel method produced excellent reliability (ICC2,1 0.78 to 1.00).

CONCLUSION
Distal diaphyseal femur appears to be a potentially informative and prudent scan site for inter/intramuscular fat evaluation with pQCT.


Keywords: adipose tissues; soft tissues; muscles; skeletal system; body composition; computed tomography

Free keywords: subcutaneous fat; soft tissue; convex hull; convex envelope; muscle; bone


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Ministry reporting: No, publication in press

Preliminary JUFO rating: 1


Last updated on 2020-09-07 at 23:12