A Structured Light System For Measuring Wounds

Plassmann, P.; Jones, B.F.; Ring, E. F. J.

doi:10.1111/0031-868x.00025

Cited by 18 publications

(19 citation statements)

References 6 publications

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“…3D surface scanning can be used to assess wound true surface area and volume. The techniques that can provide depth measurement and 3D surface profile noninvasively are structured light [2], optical photogrammetry [5,7,8] and laser scanning [9].…”

Section: Non-invasive Methods For Wounds Assessmentmentioning

confidence: 99%

“…3c, which is recorded by means of CCD video technology. Depth and surface information are calculated from the deformation of the light patterns in the scene [2,6].…”

Section: Non-invasive Methods For Wounds Assessmentmentioning

confidence: 99%

“…The grid is created by taking a sample of the points composing the surface in discrete steps of approximately 2 mm in each direction in the space. The volume of the resulting model can be calculated by integrating the distance between the base of the wound and a minimal surface attached to the wound edges [2]. A solid is reconstructed from the scanned and the interpolated surfaces by stitching the surfaces.…”

Section: Surface Representationmentioning

confidence: 99%

“…In case of wound scans, it is easier to reconstruct accurately over a small wound area while for larger wounds the reconstruction become increasingly more inaccurate. For large wounds, the increment in distance between control points reduces the efficiency of surface interpolation, which leads to higher error in volume computation [1,2].…”

Section: Surface Representationmentioning

confidence: 99%

“…Calculating ulcer volume is of particular interest since studies show that wounds start healing from the bottom followed by area changes in more advanced stages of the healing process [1,2]. The current applied methods for evaluating ulcer volumes are subjective and require direct contact with the wound, which might cause pain and discomfort for patients.…”

Section: Introductionmentioning

confidence: 99%

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Wound model reconstruction from three-dimensional skin surface imaging using the convex hull approximation method

et al. 2012

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Ulcer wound refers to a wound with underlying medical conditions that prevent healing. The ability to measure objectively early therapeutic response is important for wound management. Early therapeutic efficacy is best assessed by measurement of wound depth and volume. This study presents a non-invasive technique for assessing ulcer wound volume from three-dimensional (3D) surface scans. The accuracy of volume computation is dependent on the performance of the solid reconstruction of the wound. However, it is difficult to reconstruct solid models of wounds such as leg ulcers that extend over a large area along leg curvature and when irregularities exist on the skin surrounding the wound. The convex hull approximation preceded by surface division of the wound surface scan is proposed for solid reconstruction of wound models. This approach enables the reconstruction of models for large wounds without being affected by the surrounding irregularities. The performance of the algorithm is compared against reference volumes of wound models developed on AutoCAD. The best results are achieved using convex hull preceded by 20 surface divisions with volume computation error from 0 to 7%. Furthermore, moulds of wounds are developed to compute volumes using invasive and non-invasive methods, their percentage differences are below 8%.

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Section: Non-invasive Methods For Wounds Assessmentmentioning

confidence: 99%

“…3c, which is recorded by means of CCD video technology. Depth and surface information are calculated from the deformation of the light patterns in the scene [2,6].…”

Section: Non-invasive Methods For Wounds Assessmentmentioning

confidence: 99%

Section: Surface Representationmentioning

confidence: 99%

Section: Surface Representationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wound model reconstruction from three-dimensional skin surface imaging using the convex hull approximation method

et al. 2012

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Volume Estimation from Uncalibrated Views Applied to Wound Measurement

Albouy

Treuillet

Lucas

et al. 2005

Image Analysis and Processing – ICIAP 2005

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The aim of the ESCALE project is to supply the medical staff with objective and accurate 2D and 3D measurements for wound healing assessment from color images acquired in a free manner with a low cost digital camera. The problem addressed in this paper is the volume estimation from uncalibrated views. We present two experimentations. A Monte Carlo simulation on synthetic perturbated data leads to an average error of 3% on reconstructed points. Then, triangulation based volume estimation obtained from two uncalibrated real images gives us hope that an accuracy less than 5% is achievable. So this technique is suited to accurate wound 3D measurements. Combined with true color image processing for colorimetric tissue assessment, a such low cost system will be appropriate tool for diagnosis assistance and therapy monitoring in clinical environment.

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Assessment of Ulcer Wounds Size Using 3D Skin Surface Imaging

Hani

Eltegani

Hussein

et al. 2009

Lecture Notes in Computer Science

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In this work 3D surface scans of wounds are used to obtain several measurement including wound top area, true surface area (rue area), depth, and volume for the purpose of assessing the progress of ulcer wounds throughout treatment. KONICA MINOLTA 910 laser scanner is used to obtain the surface scans. The algorithm for estimating top area and true surface area from surface scan can reduce the inaccuracy that might result when using manual method. Two methods for solid construction and volume computation were considered; namely mid-point projection and convex hull approximation (Delaunay tetrahedralization). The performance of convex hull approximation method for volume estimation is improved by performing surface subdivision prior to the approximation. The performance of these algorithms on different patterns of simulated wound models is presented. Furthermore the algorithms are tested in two molded wounds printed using rapid prototyping (RP) technique.

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A Structured Light System For Measuring Wounds

Cited by 18 publications

References 6 publications

Wound model reconstruction from three-dimensional skin surface imaging using the convex hull approximation method

Wound model reconstruction from three-dimensional skin surface imaging using the convex hull approximation method

Volume Estimation from Uncalibrated Views Applied to Wound Measurement

Assessment of Ulcer Wounds Size Using 3D Skin Surface Imaging

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