Outlier Detection using Self-Organizing Maps for Automated Blood Cell Analysis

• URL: http://arxiv.org/abs/2208.08834v1
• Date: Thu, 18 Aug 2022 13:53:27 GMT
• Title: Outlier Detection using Self-Organizing Maps for Automated Blood Cell Analysis
• Authors: Stefan R\"ohrl, Alice Hein, Lucie Huang, Dominik Heim, Christian Klenk, Manuel Lengl, Martin Knopp, Nawal Hafez, Oliver Hayden, Klaus Diepold
• Abstract summary: In this work, we assess the suitability of Self-Organizing Maps for outlier detection on a medical dataset. We detect and evaluate outliers based on quantization errors and distance maps. Self-Organizing Maps perform on par with a manually specified filter based on expert domain knowledge.
• Score: 1.2189422792863451
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: The quality of datasets plays a crucial role in the successful training and deployment of deep learning models. Especially in the medical field, where system performance may impact the health of patients, clean datasets are a safety requirement for reliable predictions. Therefore, outlier detection is an essential process when building autonomous clinical decision systems. In this work, we assess the suitability of Self-Organizing Maps for outlier detection specifically on a medical dataset containing quantitative phase images of white blood cells. We detect and evaluate outliers based on quantization errors and distance maps. Our findings confirm the suitability of Self-Organizing Maps for unsupervised Out-Of-Distribution detection on the dataset at hand. Self-Organizing Maps perform on par with a manually specified filter based on expert domain knowledge. Additionally, they show promise as a tool in the exploration and cleaning of medical datasets. As a direction for future research, we suggest a combination of Self-Organizing Maps and feature extraction based on deep learning.

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