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rsna's Introduction

RSNA Pneumonia Detection challenge

40th place solution [silver]

The lungs segmentation via UNet model were performed first to take a closer look on data distribution. Lungs segmentation

Resulted ROI were used then as describtors for clusterisation:
Clusters

This two resulted clusters actually caught the difference of images came from different sources. Below are random samples from each of both clusters:
Samples

To overcame the domain difference an augmentation technique based on work of Philipsen et al has been employd enorm.py: Energy augmentation

Finally RetinaNet model was used along with focal loss:
Loss plot

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