An Unsupervised Deep Learning Framework for Retrospective Gating of Catheter-Based Cardiac Imaging

Figure 12

Examples of nongated image sequences and their gated results using IBG-Net. (a) L-view of IVOCT pullback sequences; (b) L-view of IVUS pullback sequences; (c) 3D appearances of the vessel segments shown in the pullback sequences before and after gating. In subparts (a) and (b), panels A and B show the L-view of the nongated and gated image sequences, respectively. Panels D and E display the L-view of the nongated and gated image sequences with detected lumen boundaries. Panels C and F show the gated image sequences after stretching without and with lumen boundaries. Before gating, the vessel walls have a sawtooth appearance, while after gating, the vessel walls become visually smooth. This conclusion can be easily drawn from the 3D appearance of the vascular segments.

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