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KMID : 1147120140200010038
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Journal of the Korean Society of Imaging Informatics in Medicine
2014 Volume.20 No. 1 p.38 ~ p.44
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Development of Lymphedema Measurement System using 3D volumetry
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Seo Jong-Hyun
Lee Won-Hee
Lee Hae-Seob
Chung Seung-Hyun
Kim Kwang-Gi
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Abstract
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Lymphedema is a condition of lymph retention beneath the subcutaneous fat layer caused by impaired lymph flow. The method which measures the volume of limb has commonly used as an objective indicator of lymphedema diagnosis. However, the previous methods acquired low reliability because their results showed large error depending on the posture of the patient or the examiner. They have been unable to measure the localized lymphedema. In this study, we developed the system for creating a three-dimensional (3D) solid model of the upper limb and measuring its volume in real time with Kinect sensor which provides 3D depth images. We obtained four depth images taken by each of four Kinects at the same time and created 3D solid model for upper limb using the developed algorithm. Additionally, the volume of the 3D model was determined by summing the number of unit volume (voxel) constituting the inside of it. The results of our measurement achieved comparable accuracy to medical CT, regardless of the posture of the patient or the examiner. Moreover, it was possible to measure the volume of the upper limb at a high speed (within 1 min.) despite of its complex 3D structure. The proposed system enabled accurate and rapid diagnosis for lymphedema and can be set up with efficient cost. Furthermore, this system potentially can detect the change of volume caused by local lymphedema.
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KEYWORD
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Edema, Lymphedema, 3D volumetry, Kinect, Perspective transform
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