Before revision:  In this paper, we trace the history of how the 3D CNN was developed from its machine learning roots,  brief mathematical description of 3D CNN and the preprocessing steps required for medical images before feeding them to 3D CNNs.
After revision:  In this paper, we trace the history of how the 3D CNN was developed from its machine learning roots, give a brief mathematical description of 3D CNN and the preprocessing steps required for medical images before feeding them to 3D CNNs.