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Technical Brief

Measuring Three-Dimensional Thorax Motion Via Biplane Radiographic Imaging: Technique and Preliminary Results

[+] Author and Article Information
Timothy G. Baumer

Henry Ford Health System,
Department of Orthopaedic Surgery,
Bone and Joint Center,
2799 West Grand Boulevard, E&R 2015,
Detroit, MI 48202
e-mail: tbaumer1@hfhs.org

Joshua W. Giles

Roth|McFarlane Hand and Upper Limb
Centre Bioengineering Laboratory,
Western University,
London, ON N6A 4L6, Canada
e-mail: Giles.joshgiles@gmail.com

Anne Drake

Henry Ford Health System,
Department of Orthopaedic Surgery,
Bone and Joint Center,
2799 West Grand Boulevard, E&R 2015,
Detroit, MI 48202
e-mail: aed65@case.edu

Roger Zauel

Henry Ford Health System,
Department of Orthopaedic Surgery,
Bone and Joint Center,
2799 West Grand Boulevard, E&R 2015,
Detroit, MI 48202
e-mail: rzauel1@bjc.hfh.edu

Michael J. Bey

Henry Ford Health System,
Department of Orthopaedic Surgery,
Bone and Joint Center,
2799 West Grand Boulevard, E&R 2015,
Detroit, MI 48202
e-mail: mbey1@bjc.hfh.edu

1Corresponding author.

2Current affiliation: Imperial College London, South Kensington Campus, London SW7 2AZ.

Manuscript received May 28, 2015; final manuscript received September 29, 2015; published online December 8, 2015. Assoc. Editor: Brian D. Stemper.

J Biomech Eng 138(1), 014504 (Dec 08, 2015) (5 pages) Paper No: BIO-15-1267; doi: 10.1115/1.4032058 History: Received May 28, 2015; Revised September 29, 2015

Measures of scapulothoracic motion are dependent on accurate imaging of the scapula and thorax. Advanced radiographic techniques can provide accurate measures of scapular motion, but the limited 3D imaging volume of these techniques often precludes measurement of thorax motion. To overcome this, a thorax coordinate system was defined based on the position of rib pairs and then compared to a conventional sternum/spine-based thorax coordinate system. Alignment of the rib-based coordinate system was dependent on the rib pairs used, with the rib3:rib4 pairing aligned to within 4.4 ± 2.1 deg of the conventional thorax coordinate system.

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Copyright © 2016 by ASME
Topics: Rotation , Imaging
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References

Figures

Grahic Jump Location
Fig. 1

Anatomical landmark definitions used in thorax coordinate system construction for (a) the conventional thorax coordinate system promoted by the International Society of Biomechanics (ISB) [28] and (b) rib-based thorax coordinate systems, based on all possible rib-pair combinations of rib1–rib6 (rib1:rib2, rib1:rib3, … , rib5:rib6)

Grahic Jump Location
Fig. 2

Comparison of the conventional thorax coordinate system promoted by the ISB (A) and the rib-based coordinate system (B)

Grahic Jump Location
Fig. 3

Comparison of scapulothoracic motion between the current study (⋄) and data previously reported by McClure et al. [9] (•) in terms of anterior/posterior tilting (a), internal/external rotation (b), and upward/downward rotation (c). The data from the current study are reported as mean (±SD) of three patients, whereas the McClure data are from eight healthy subjects.

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