In this work we investigate the usage of deep learning techniques on SPECT data solving a multi-organ segmentation problem. We extract projections from 21 Lu-177 MELP SPECT scans and obtain the corresponding ground truth labels from the accompanied CT scans by forward-projection of 3D CT organ segmentations. We train a U-Net to predict the area of the kidney, spleen, liver, and background seen in the projection data, using a weighted dice loss between prediction and target labels to account for class imbalance.
With our method we achieved a mean dice coefficient of 72 % on the test set, encouraging us to perform further experiments using the U-Net.
Convolutional Neural Networks for multi-organ segmentation of SPECT projections
📋 Type
MA thesis
⚡ Status
finished
📅 Duration
Mar 1, 2020 – Oct 8, 2020
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Primary supervisors
Maximilian Reymann
Dr. Michal Cachovan (Siemens Healthineers)
Dr. Philipp Ritt ( Nuklearmedizinische Klinik, Universitätsklinikum Erlangen)
🎓 Student
Nina Mürschberger
Medical Engineering