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Proceedings Paper

Automatic CAD of meniscal tears on MR imaging: a morphology-based approach
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Paper Abstract

Knee-related injuries, including meniscal tears, are common in young athletes and require accurate diagnosis and appropriate surgical intervention. Although with proper technique and skill, confidence in the detection of meniscal tears should be high, this task continues to be a challenge for many inexperienced radiologists. The purpose of our study was to automate detection of meniscal tears of the knee using a computer-aided detection (CAD) algorithm. Automated segmentation of the sagittal T1-weighted MR imaging sequences of the knee in 28 patients with diagnoses of meniscal tears was performed using morphologic image processing in a 3-step process including cropping, thresholding, and application of morphological constraints. After meniscal segmentation, abnormal linear meniscal signal was extracted through a second thresholding process. The results of this process were validated by comparison with the interpretations of 2 board-certified musculoskeletal radiologists. The automated meniscal extraction algorithm process was able to successfully perform region of interest selection, thresholding, and object shape constraint tasks to produce a convex image isolating the menisci in more than 69% of the 28 cases. A high correlation was also noted between the CAD algorithm and human observer results in identification of complex meniscal tears. Our initial investigation indicates considerable promise for automatic detection of simple and complex meniscal tears of the knee using the CAD algorithm. This observation poses interesting possibilities for increasing radiologist productivity and confidence, improving patient outcomes, and applying more sophisticated CAD algorithms to orthopedic imaging tasks.

Paper Details

Date Published: 30 March 2007
PDF: 10 pages
Proc. SPIE 6514, Medical Imaging 2007: Computer-Aided Diagnosis, 651437 (30 March 2007); doi: 10.1117/12.713288
Show Author Affiliations
Bharath Ramakrishna, Univ. of Maryland, Baltimore County (United States)
Weimin Liu, Univ. of Maryland, Baltimore County (United States)
Nabile Safdar, Univ. of Maryland School of Medicine (United States)
Khan Siddiqui, VA Maryland Health Care System (United States)
Woojin Kim, VA Maryland Health Care System (United States)
Univ. of Pennsylvania Hospital (United States)
Krishna Juluru, VA Maryland Health Care System (United States)
Johns Hopkins Univ. School of Medicine (United States)
Chein-I Chang, Univ. of Maryland, Baltimore County (United States)
Eliot Siegel, Univ. of Maryland School of Medicine (United States)
VA Maryland Health Care System (United States)


Published in SPIE Proceedings Vol. 6514:
Medical Imaging 2007: Computer-Aided Diagnosis
Maryellen L. Giger; Nico Karssemeijer, Editor(s)

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