Instantiation-Net: 3D Mesh Reconstruction from Single 2D Image for Right Ventricle
This work addresses the problem of enhancing 2D navigation to 3D for robot-assisted minimally invasive surgery, specifically for the right ventricle, representing an incremental improvement over prior methods.
The paper tackles 3D mesh reconstruction of the right ventricle from a single 2D image for surgical navigation, proposing Instantiation-Net, which combines DCNN and GCN to achieve this task with detailed validation showing practical strength and clinical potential.
3D shape instantiation which reconstructs the 3D shape of a target from limited 2D images or projections is an emerging technique for surgical intervention. It improves the currently less-informative and insufficient 2D navigation schemes for robot-assisted Minimally Invasive Surgery (MIS) to 3D navigation. Previously, a general and registration-free framework was proposed for 3D shape instantiation based on Kernel Partial Least Square Regression (KPLSR), requiring manually segmented anatomical structures as the pre-requisite. Two hyper-parameters including the Gaussian width and component number also need to be carefully adjusted. Deep Convolutional Neural Network (DCNN) based framework has also been proposed to reconstruct a 3D point cloud from a single 2D image, with end-to-end and fully automatic learning. In this paper, an Instantiation-Net is proposed to reconstruct the 3D mesh of a target from its a single 2D image, by using DCNN to extract features from the 2D image and Graph Convolutional Network (GCN) to reconstruct the 3D mesh, and using Fully Connected (FC) layers to connect the DCNN to GCN. Detailed validation was performed to demonstrate the practical strength of the method and its potential clinical use.