Medical Image Analysis

DASPP is a deeper version of the ASPP module (the latter from DeepLabv3) that adds standard 3 × 3 convolution after 3 × 3 dilated convolutions to refine the features and also fusing the input and the output of the DASPP module via short residual connection. Also, the number of convolution filters of ASPP is reduced from 255 to 96 to gain computational performance.

LiteSeg is a lightweight architecture for semantic segmentation that uses a deeper version of Atrous Spatial Pyramid Pooling module (ASPP) and applies short and long residual connections, and depthwise separable convolution, resulting in a faster, more efficient model.

Models Genesis, or Generic Autodidactic Models, is a self-supervised approach for learning 3D image representations. The objective of Models Genesis is to learn a common image representation that is transferable and generalizable across diseases, organs, and modalities. It consists of an encoder-decoder architecture with skip connections in between, and is trained to learn a common image representation by restoring the original sub-volume $x\_{i}$ (as ground truth) from the transformed one $\bar{x}\_{i}$ (as input), in which the reconstruction loss (MSE) is computed between the model prediction $x'\_{0}$ and ground truth $x\_{i}$. Once trained, the encoder alone can be fine-tuned for target classification tasks; while the encoder and decoder together can be fine-tuned for target segmentation tasks.