Random smooth gray value transformations for cross modality learning with gray value invariant networks
This addresses the challenge of modality differences in medical imaging, though it appears incremental as it builds on existing augmentation techniques.
The paper tackled the problem of cross-modality medical image segmentation by proposing a method to transform gray values, enabling CT image segmentation using a network trained only on MR images.
Random transformations are commonly used for augmentation of the training data with the goal of reducing the uniformity of the training samples. These transformations normally aim at variations that can be expected in images from the same modality. Here, we propose a simple method for transforming the gray values of an image with the goal of reducing cross modality differences. This approach enables segmentation of the lumbar vertebral bodies in CT images using a network trained exclusively with MR images. The source code is made available at https://github.com/nlessmann/rsgt