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      DESCRIPCIÓN DE UN SISTEMA PARA LA MEDICIÓN DE LAS PRESIONES PLANTARES POR MEDIO DEL PROCESAMIENTO DE IMÁGENES: FASE I

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          Abstract

          La medida de la presión plantar es fundamental para conocer la distribución de las fuerzas en la planta del pie. Estos valores son importantes para el diagnóstico y tratamiento de diferentes patologías como úlceras diabéticas en la planta del pie y presencia de deformidades en extremidades inferiores, entre otras. En el presente artículo se describe el desarrollo de un podobarógrafo para el análisis de la huella plantar, cuyo desarrollo incluyó la fabricación de un podoscopio, la selección de un material transductor adecuado y el desarrollo del software para el procesamiento de las imágenes capturadas por una cámara de video. El dispositivo propuesto PodoMED permite realizar un análisis dinámico y estático de la huella, pues aparte de mostrar cómo es la distribución de presiones en la planta del pie durante la marcha, por medio de imágenes en seudocolor, tiene la opción de emitir una valoración de la huella, donde se muestran medidas como el índice de valgo, el ángulo de Clarke, el índice de Hernández Corvo, entre otros. Para el desarrollo de este proyecto se realizaron ensayos experimentales para minimizar el ruido de la imagen, lo cual se logró con la utilización de un filtro físico y otro para la imagen por medio de software. Para una etapa futura, se planea la calibración y validación del sistema, con lo cual se pretende brindar mayor confiabilidad y repetibilidad.

          Translated abstract

          The measurement of the plantar pressure is basic to know the force distribution in the sole. These values are important to diagnosis and treat different pathologies as diabetic ulcerate in the sole, bone, and muscular deformations in the lower limb, etc. This paper describes the development of a pedobarograph in order to analyze the sole. The development can be classified in three stages, building of the Podoscopio, selection of the transducer material and development of the software in order to processes the picture captured by the camcorder. The device PodoMED makes a dynamic and static analysis of the sole, using pseudocolor images for walking analysis and podological indexes as valgo index, Clarke angle, Hernandez Corvo index, etc. for static analysis. In the development of this project we carried out experimental test to minimize the noise present in the image. It was achieved by using a physical filter and image processing filter. In a future phase, it plans the system calibration and validation, which expects to offer more reliability itself.

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          Most cited references67

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          Gait Analysis: Normal and Pathological Function

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            Critical light reflection at a plastic/glass interface and its application to foot pressure measurements.

            The necessary properties of plastic materials for use in a method of foot pressure distribution measurements have been assessed, and the mechanisms in operation at an illuminated plastic to glass interface underload have been investigated. A hypothesis is given of the physical principles upon which the operation of this technique is based and it is shown that a calibrated analysis of both the static and dynamic distribution of pressure under the foot is possible by this technique.
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              An investigation of the centres of pressure under the foot while walking.

              The forces under the foot while walking have been measured using a high sensitivity force-plate of the strip-suspended type combined with simultaneous filming of the sole of the foot. The recording of data and the calculation and plotting of results were much simplified by computer aid. Normal and abnormal feet, both barefoot and shod, were investigated in sixteen subjects. It was found that in normal barefoot walking the forefoot carried a total load of the order of three times that of the heel. When footwear was worn the function of the forefoot was progressively reduced as the rigidity of the sole of the shoe increased. Painful conditions of the forefoot also produced a large reduction in the proportion of the total load transferred.
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                Author and article information

                Journal
                eia
                Revista EIA
                Rev.EIA.Esc.Ing.Antioq
                Escuela de ingenieria de Antioquia (Envigado, Antioquia, Colombia )
                1794-1237
                2463-0950
                December 2006
                : 6
                : 43-55
                Affiliations
                [03] orgnameCentro de Control Acueducto Empresas Públicas de Medellín
                [05] Medellín orgnameParque Explora
                [02] orgnameEscuela de Ingeniería de Antioquia orgdiv1Grupo Gibec
                [01] orgnameUniversidad EAFIT
                [04] orgnameEscuela de Ingeniería de Antioquia orgdiv1Grupo Ingeniería Biomédica
                Article
                S1794-12372006000200005 S1794-1237(06)00000605
                abf867bd-2f91-4073-9554-cb6459e740a0

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 30 November 2006
                : 15 March 2006
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 41, Pages: 13
                Product

                SciELO Colombia

                Self URI: Texto completo solamente en formato PDF (ES)
                Categories
                Artículos originales

                Índices podológicos,podobarógrafo,podoscopio,procesamiento de imágenes,Podological indexes,pedobarograph,Podoscopio,image processing

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