Abstract:
RATIONALE, AIMS AND OBJECTIVES:The goal is to fully automate the calculation of a breast ptosis measure from clinical photographs through automatic localization of fiducial points relevant to the measure. METHODS:Sixty-eight women (97 clinical photographs) who underwent or were scheduled for breast reconstruction were included. The photographs were divided into a development set (N = 49) and an evaluation set (N = 48). The breast ptosis measure is obtained automatically from distances between three fiducial points: the nipple, the lowest visible point of breast (LVP), and the lateral terminus of the inframammary fold (LT). The nipple is localized using the YIQ colour space to highlight the contrast between the areola and the surrounding breast skin. The areola is localized using its shape, location and high Q component intensity. The breast contour is estimated using Dijkstra's shortest path algorithm on the gradient of the photograph in greyscale. The lowest point of the estimated contour is set as the LVP. To locate the anatomically subtle LT, the location of patient's axilla is used as a reference. RESULTS:The algorithm's efficacy was evaluated by comparing manual and automated localizations of the fiducial points. The average nipple diameter was used as a cut-off to define success. The algorithm showed 90, 91 and 83% accuracy for locating the nipple, LVP and LT in the evaluation set, respectively. CONCLUSION:This study presents a new automated algorithm that may facilitate the quantification of breast ptosis from lateral views of patients' photographs.
journal_name
J Eval Clin Practjournal_title
Journal of evaluation in clinical practiceauthors
Lee J,Kim E,Reece GP,Crosby MA,Beahm EK,Markey MKdoi
10.1111/jep.12397subject
Has Abstractpub_date
2015-10-01 00:00:00pages
900-10issue
5eissn
1356-1294issn
1365-2753journal_volume
21pub_type
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journal_title:Journal of evaluation in clinical practice
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journal_title:Journal of evaluation in clinical practice
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journal_title:Journal of evaluation in clinical practice
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journal_title:Journal of evaluation in clinical practice
pub_type: 杂志文章
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journal_title:Journal of evaluation in clinical practice
pub_type: 杂志文章,随机对照试验
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journal_title:Journal of evaluation in clinical practice
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journal_title:Journal of evaluation in clinical practice
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journal_title:Journal of evaluation in clinical practice
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journal_title:Journal of evaluation in clinical practice
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journal_title:Journal of evaluation in clinical practice
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