Publication Date:
2018-10-02
Description:
X-ray film has been applied widely in the elementary diagnosis and screening of thorax diseases. The rapid development of deep learning has improved automatic diagnosis of thorax disease. But different thorax disease in database inevitably exist the problem of unbalanced quantity because of the different morbidity in real life. So, the restricted factor is not just the architecture of the models but the unbalanced problem of database. What’s more, different from the same problem of natural images, this unbalanced problem is not just the unbalanced quantity but also the unbalanced complexity of diagnosis between samples. In this study, we introduced the Focal Loss and proposed the W-FL (weight Focal Loss) function which makes the model pay more attention to the difficult samples and those kinds of diseases which have small quantity and protect the loss and computed gradients from overwhelming by easy negatives. We evaluate the efficiency of W-FL function on the public Chest X-ray...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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