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Proceedings Paper

Image quality and segmentation
Author(s): Gargi V. Pednekar; Jayaram K. Udupa; David J. McLaughlin; Xingyu Wu; Yubing Tong; Charles B. Simone II; Joseph Camaratta; Drew A. Torigian
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Paper Abstract

Algorithms for image segmentation (including object recognition and delineation) are influenced by the quality of object appearance in the image and overall image quality. However, the issue of how to perform segmentation evaluation as a function of these quality factors has not been addressed in the literature. In this paper, we present a solution to this problem. We devised a set of key quality criteria that influence segmentation (global and regional): posture deviations, image noise, beam hardening artifacts (streak artifacts), shape distortion, presence of pathology, object intensity deviation, and object contrast. A trained reader assigned a grade to each object for each criterion in each study. We developed algorithms based on logical predicates for determining a 1 to 10 numeric quality score for each object and each image from reader-assigned quality grades. We analyzed these object and image quality scores (OQS and IQS, respectively) in our data cohort by gender and age. We performed recognition and delineation of all objects using recent adaptations [8, 9] of our Automatic Anatomy Recognition (AAR) framework [6] and analyzed the accuracy of recognition and delineation of each object. We illustrate our method on 216 head & neck and 211 thoracic cancer computed tomography (CT) studies.

Paper Details

Date Published: 13 March 2018
PDF: 7 pages
Proc. SPIE 10576, Medical Imaging 2018: Image-Guided Procedures, Robotic Interventions, and Modeling, 105762N (13 March 2018); doi: 10.1117/12.2293622
Show Author Affiliations
Gargi V. Pednekar, Quantitative Radiology Solutions (United States)
Jayaram K. Udupa, Univ. of Pennsylvania (United States)
David J. McLaughlin, Quantitative Radiology Solutions (United States)
Xingyu Wu, Univ. of Pennsylvania (United States)
Yubing Tong, Univ. of Pennsylvania (United States)
Charles B. Simone II, Univ. of Maryland School of Medicine (United States)
Joseph Camaratta, Quantitative Radiology Solutions (United States)
Drew A. Torigian, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 10576:
Medical Imaging 2018: Image-Guided Procedures, Robotic Interventions, and Modeling
Baowei Fei; Robert J. Webster III, Editor(s)

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