Semi–supervised learning for image modality classification

García Seco de Herrera, Alba (University of Applied Sciences and Arts Western Switzerland (HES-SO Valais-Wallis)) ; Markonis, Dimitrios (University of Applied Sciences and Arts Western Switzerland (HES-SO Valais-Wallis)) ; Joyseeree, Ranveer (University of Applied Sciences and Arts Western Switzerland (HES-SO Valais-Wallis), Swiss Federal Institute of Technology, Zurich, Switzerland) ; Schaer, Roger (University of Applied Sciences and Arts Western Switzerland (HES-SO Valais-Wallis)) ; Foncubierta-Rodríguez, Antonio (Swiss Federal Institute of Technology, Zurich, Switzerland) ; Müller, Henning (University of Applied Sciences and Arts Western Switzerland (HES-SO Valais-Wallis))

Searching for medical image content is a regular task for many physicians, especially in radiology. Retrieval of medical images from the scientific literature can benefit from automatic modality classification to focus the search and filter out non–relevant items. Training datasets are often unevenly distributed regarding the classes resulting sometimes in a less than optimal classification performance. This article proposes a semi–supervised learning approach applied using a k–Nearest Neighbour (k–NN) classifier to exploit unlabelled data and to expand the training set. The algorithmic implementation is described and the method is evaluated on the ImageCLEFmed modality classification benchmark. Results show that this approach achieves an improved performance over supervised k–NN and Random Forest classifiers. Moreover, medical case–based retrieval benefits from the modality filter.


Keywords:
Conference Type:
full paper
Faculty:
Economie et Services
School:
HEG-VS
Institute:
Institut Informatique de gestion
Subject(s):
Informatique
Publisher:
Vienna, Austria, 29 march 2015
Date:
Vienna, Austria
29 march 2015
2015
Pagination:
15 p.
Published in:
Proceedings of ECIR workshop Multimodal Retrieval in the Medical Domain 2015
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2015-09-04, last modified 2019-06-11

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