1. Introduction
2. 3D CNN in Medical Image Segmentation
2.1. Convolutional Neural Networks: An Overview
2.2. 2D CNN vs 3D CNN in Image Segmentation
2.3. An Overview on 3D Medical Data
2.4. Why 3D CNN is Important in 3D Medical Image Segmentation?
2.5. 3D CNN in Medical Image Segmentation
2.  3D Patch-wise Segmentation Models
3.  Multi-task Learning Models
3. Discussion & Conclusion
3.1. Summary
3.2. Challenges in 3D Medical Image Segmentation