1 April 2016 Automated kidney morphology measurements from ultrasound images using texture and edge analysis
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Abstract
In a typical ultrasound scan, a sonographer measures Kidney morphology to assess renal abnormalities. Kidney morphology can also help to discriminate between chronic and acute kidney failure. The caliper placements and volume measurements are often time consuming and an automated solution will help to improve accuracy, repeatability and throughput. In this work, we developed an automated Kidney morphology measurement solution from long axis Ultrasound scans. Automated kidney segmentation is challenging due to wide variability in kidney shape, size, weak contrast of the kidney boundaries and presence of strong edges like diaphragm, fat layers. To address the challenges and be able to accurately localize and detect kidney regions, we present a two-step algorithm that makes use of edge and texture information in combination with anatomical cues. First, we use an edge analysis technique to localize kidney region by matching the edge map with predefined templates. To accurately estimate the kidney morphology, we use textural information in a machine learning algorithm framework using Haar features and Gradient boosting classifier. We have tested the algorithm on 45 unseen cases and the performance against ground truth is measured by computing Dice overlap, % error in major and minor axis of kidney. The algorithm shows successful performance on 80% cases.
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Hariharan Ravishankar, Hariharan Ravishankar, Pavan Annangi, Pavan Annangi, Michael Washburn, Michael Washburn, Justin Lanning, Justin Lanning, "Automated kidney morphology measurements from ultrasound images using texture and edge analysis", Proc. SPIE 9790, Medical Imaging 2016: Ultrasonic Imaging and Tomography, 97901A (1 April 2016); doi: 10.1117/12.2216802; https://doi.org/10.1117/12.2216802
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