耳介画像データベースシステムの開発と耳介計測データの統計解析

概要

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In Japan, the birth rate of neonates with malformed ears is considerably high. Most cases are healable spontaneously or curable by mounting a suitably shaped orthosis during the neonatal period.W e have been researching computer assisted system for the treatment of anomaly of the auricle. As part of the system, we developed a database system for managing auricular images. Distinctive features are as follows: a contour of auricle can be captured easily, various measurement data of the auricle such as ear length, ear breadth, ear base length, etc., are calculated automatically from the contour and these measured data can be managed. Also by using the database system, we constructed a database that contains550auricular images of284neonates. All images were measured and statistical analyses are performed. We classified the data by sex and the 7 types of auricular shape and compared them.These types are normal ear, upper folded helix, diagonal side folded helix, side folded helix, Stahls ear, folded lobulus auriculae and others. Finally, following results are obtained: length and breadth of male normal ears were larger than that of female normal ears; for every type of anomaly, at least one measurement item differed from that of normal ears.