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The Scientific World Journal
Volume 2013, Article ID 486146, 13 pages
http://dx.doi.org/10.1155/2013/486146
Clinical Study

Hands-Off and Hands-On Casting Consistency of Amputee below Knee Sockets Using Magnetic Resonance Imaging

1Department of Orthotics and Prosthetics, University of Social Welfare and Rehabilitation Sciences, Tehran 1985713834, Iran
2Department of Biomedical Engineering, University of Strathclyde, Curran Building, 131 St. James Road, Glasgow G4 0LS, UK
3AKM-STATS, Glasgow G1 1EX, UK

Received 19 August 2013; Accepted 26 September 2013

Academic Editors: C. Corsi and B. Unver

Copyright © 2013 Mohammad Reza Safari et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Residual limb shape capturing (Casting) consistency has a great influence on the quality of socket fit. Magnetic Resonance Imaging was used to establish a reliable reference grid for intercast and intracast shape and volume consistency of two common casting methods, Hands-off and Hands-on. Residual limbs were cast for twelve people with a unilateral below knee amputation and scanned twice for each casting concept. Subsequently, all four volume images of each amputee were semiautomatically segmented and registered to a common coordinate system using the tibia and then the shape and volume differences were calculated. The results show that both casting methods have intra cast volume consistency and there is no significant volume difference between the two methods. Inter- and intracast mean volume differences were not clinically significant based on the volume of one sock criteria. Neither the Hands-off nor the Hands-on method resulted in a consistent residual limb shape as the coefficient of variation of shape differences was high. The resultant shape of the residual limb in the Hands-off casting was variable but the differences were not clinically significant. For the Hands-on casting, shape differences were equal to the maximum acceptable limit for a poor socket fit.