Meeting Banner
Abstract #1613

Comparison of 12 different constructs of pre-trained convolutional encoders for semantic segmentation in prostate brachytherapy MRI

Jeremiah Wayne Sanders1, Steven Frank2, Gary Lewis3, and Jingfei Ma1

1Imaging Physics, University of Texas MD Anderson Cancer Center, Houston, TX, United States, 2Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, United States, 3Radiation Oncology, University of Texas Medical Branch, Galveston, TX, United States

Anatomy contouring is essential in quantifying the dose delivered to the prostate and surrounding anatomy after low-dose-rate prostate brachytherapy. Currently, five anatomical structures including the prostate, rectum, seminal vesicles, external urinary sphincter, and bladder, are contoured manually by a radiation oncologist. In this work, we investigated six convolutional encoder-decoder networks for automatic segmentation of the five organs. Six pretrained convolutional encoders and two loss functions were investigated. This yielded twelve different models for comparison. Results indicated that classification accuracy of convolutional encoders pretrained on the ImageNet dataset positively correlated with semantic segmentation accuracy in prostate MRI.

This abstract and the presentation materials are available to members only; a login is required.

Join Here