Instructions on SHIPS usage

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Semi-automated Hip Morphology Software Programme (SHIPS):
Read Me File
S.Thiagarajah1, L.Yang1, JM.Wilkinson1. 1Academic Unit of Bone Metabolism,
Department of Human Metabolism, University of Sheffield, Sheffield, United
Kingdom and NIHR Biomedical Research Unit for Musculoskeletal Disease,
Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK, 2011 .
LICENSE AND DISTRIBUTION
The Semi-automated HIP morphology Software programme (SHIPS) is freeware
and can be used by anyone free of charge. Re-distribution without the authors’
permission is forbidden.
WARRANTIES
The program comes with no warranties whatsoever.
CITATION
If you use the Semi-automated Hip Morphology Software Programme (SHIPS)
please cite it as:
S.Thiagarajah, S.J. MacInnes, L.Yang, M.Doherty, JM.Wilkinson. Quantifying the
Characteristics of the Acetabulum and Proximal Femur Using a Semi-automated
Hip Morphology Software Programme (SHIPS). Hip International, in press.
BACKGROUND
An individual’s risk of developing hip osteoarthritis (OA) associates with joint
shape. However, validated accurate tools to quantify these morphological
characteristics are few. We developed a Matlab-based Semi-automated HIP
Software program (SHIPS) that measures 10 morphologic characteristics of the
hip that associate with OA using a digitized radiograph.
INPUT
Digitised radiograph (JPEG, TIFF).
Minimum exposure: Pelvis AP.
REQUIREMENTS
Matlab R2007b (MathWorks Inc, Cambridge, UK) or more recent versions.
Download available: http://www.mathworks.co.uk/products/matlab/
INSTALLATION (WINDOWS)
Copy SHIPS file into your computer
RUNNING THE PROGRAM
Run Matlab.
In Matlab terminal type <SHIPS>
Browse folders to identify JPEG/TIFF image to be analysed.
Follow the user-prompts on-screen.
OUTPUT
Excel spreadsheet sent to the same folder as those of the first digitized
radiograph to be analysed. Open excel spreadsheet.
The acetabular angular measurement characteristics are acetabular tilt (AT),
horizontal toit externe (HTE), lateral centre-edge angle (LCEA), and Sharpe’s angle
(SA). The software also calculates the acetabular index depth to width ratio
(AIDWR). The calculated proximal femoral angular measurement characteristics
are the alpha angle (AA), the modified proximal femoral angle (MPFA), and the
femoral neck-shaft angle (FNSA). The calculated proximal femoral linear
measurement ratios are the femoral head-to-neck ratio (FHFNR) and the femoral
neck length-to-width ratio (FNLWR).
In addition, are several linear
measurements (recorded in pixels); inter-femoral head width (IFHW); interacetabular width (IAW); acetabular width (AW), acetabular depth (AD); femoral
head diameter (FHD); femoral neck width (FNW); femoral neck length (FNAL);
sacrococcygeal joint to pubic symphysis distance (SCJPD).
foramen width ratio (ROFW).
CONTACT
For any further information:
Mr Shankar Thiagarajah
Academic Unit of Bone Metabolism,
Department of Human Metabolism,
University of Sheffield,
Sheffield,
United Kingdom
[email protected]
Finally obturator
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