Accuracy Verification of Magnetic Resonance Imaging (MRI) Technology for Lower-Limb Prosthetic Research: Utilising Animal Soft Tissue Specimen and Common Socket Casting Materials

Safari, Reza; Rowe, Peter; Buis, Arjan

doi:10.1100/2012/156186

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…Soft tissue and bone were segmented semiautomatically from surrounding materials, for example, silicone and POP. The accuracy of the segmentation procedure has been previously reported using animal specimen and was 0.43% for surface area and 2.25% for volume measurement [ 20 ].…”

Section: Methodsmentioning

confidence: 97%

“…Studies have shown that MRI is an accurate method of soft tissue and bone dimension and volume measurement and has been used to estimate accurate morphological information of different tissues, for example, bone, muscle, and articular cartilage [ 17 – 19 ]. Additionally, the use of MRI in a residual limb morphological measurement, when common casting materials were used, was validated in previous experiments [ 15 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

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

Safari

Rowe

McFadyen³

et al. 2013

The Scientific World Journal

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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.

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Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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

Safari

Rowe

McFadyen³

et al. 2013

The Scientific World Journal

Self Cite

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“…This technique has been also proven by Smith et al [29] as well as by Smith et al [37] to have less than 1.0% of volume errors. Other than that, there are only two publications that directly measured the residual limb volume using the MRI technique, namely Buis et al [41] and Miyatani et al [47], with one further study conducted by Safari et al [61] that did not directly involve the residual limb. In terms of the time taken to finish the scan process, the ultrasound technique takes 780 s (approx.…”

Section: Other Techniques (Contact Probes Ultrasound Sxct and Mri)mentioning

confidence: 99%

Techniques for Measuring the Fluctuation of Residual Lower Limb Volume in Clinical Practices: A Systematic Review of the Past Four Decades

Ibrahim,

Hashim,

Abd Razak

et al. 2024

Applied Sciences

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Increased pressure and shear stress distributions at the limb–socket interface are hypothesised to result from changes in the residual limb shape and volume, which can cause socket fit difficulties. Accurate residual limb volume measurements may aid clinicians in developing strategies to accommodate volume fluctuations. This review primarily aims to analyse the techniques available for measuring the residual lower limb volume that may be used in clinical settings, as documented in the works published over the previous four decades. A comprehensive search of articles in PubMed, ScienceDirect, Web of Science, and Google Scholar identified 904 articles, and further analysis resulted in only 39 articles being chosen to be analysed. Based on the findings, there are nine techniques available to measure the residual limb volume: water displacement, anthropometric measurement, contact probes, optical scanning, spiral X-ray computed tomography (SXCT), magnetic resonance imaging (MRI), ultrasound, laser scanning, and bioimpedance. Considering the variety of techniques for determining residual limb volume, it is critical to choose the ones that best suit clinicians’ objectives, and each technique has potential sources of error that should be avoided by taking precautionary action. A comprehensive study of the measurement techniques is needed since researchers have developed and extensively utilised many new measuring devices, especially handheld 3D laser scanners.

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“…CAD (non-contact) 12,[22][23][24][25][26][27] are optical scanners that utilise laser, 28 fringe projection 29 and silhouetting 30,31 technology to capture shape. Ultrasound, 32 magnetic resonance imaging (MRI) 18,33 and spiral X-ray computed tomography (SXCT) 30,34 are systems that can capture both external and internal structures of the residuum. These methods are also non-contact; however, due to their added capabilities, they are classed under a separate sub-group.…”

Section: Categorising Shape Capturementioning

confidence: 99%

Influences and trends of various shape-capture methods on outcomes in trans-tibial prosthetics

Yang

Aslani

McGarry

2019

Prosthetics &Amp; Orthotics International

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Introduction: In trans-tibial prosthetics, shape-capture methods are employed to create a representation of the residuum. Shape-capture methods can be grouped into the categories of ‘hands-on’, ‘hands-off’ and computer-aided design. Objective: This review examines the influences and trends of shape-capture methods on the outcomes of quality, comfort of user and clinical efficiency, in the population of trans-tibial prosthesis users. Study Design: Systematic Review Method: Databases and relevant journals were searched. Participants included trans-tibial prosthetics users/limb models. Interventions included shape-capture methods. Outcomes included quality, comfort of user and clinical efficiency. Results: Overall, 22 papers were evaluated; 8 papers evaluated hands-on and hands-off methods, 2 evaluated computer-aided design and 12 evaluated measurement systems used with shape capture. No papers relating to clinical efficiency were found. Conclusion: Overall evidence was weak in suggesting that effects on outcomes were due to the sole influences of shape capture. However, studies suggest that hands-on methods are dependent on a prosthetist’s skill. Hands-off methods, although repeatable, might still require experience to attain a good fit. Computer-aided design studies were mostly done on theoretical models. Shape-capture measurements require more consistent ‘gold standards’. The relation between socket fit and comfort is still unclear. Overall, more research is required in each area. Clinical relevance A good fitting prosthetic socket is crucial for efficient and comfortable use of a prosthesis. To attain the best chances of a good fit, it is important that the characteristics of the residuum are captured as accurately as possible during the initial “shape capture” stage. This paper attempts to categorize and evaluate the existing shape capture methods on their influence and trends on various outcomes - Quality of shape capture, comfort of user and clinical efficiency.

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Accuracy Verification of Magnetic Resonance Imaging (MRI) Technology for Lower-Limb Prosthetic Research: Utilising Animal Soft Tissue Specimen and Common Socket Casting Materials

Cited by 7 publications

References 34 publications

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

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

Techniques for Measuring the Fluctuation of Residual Lower Limb Volume in Clinical Practices: A Systematic Review of the Past Four Decades

Influences and trends of various shape-capture methods on outcomes in trans-tibial prosthetics

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