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Mohannad Elkady@Mohannad_Elkady
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Ultrasound AI
4. AI Training Methodology To achieve superhuman precision while guaranteeing patient safety, the robotic agent will be trained using a two-stage hybrid learning pipeline: Phase A: Imitation Learning (IL) — Learning the Human Blueprint Long-horizon surgical tasks (like suturing a wound) are too complex for an AI to learn from scratch safely. Teleoperation & Data Capture: Surgical Doctors perform simulated operations in Omniverse using haptic feedback controllers. The system records endoscopic video, robot joint kinematics, and tool-tissue contact forces. Behavioral Cloning: AI Engineers ingest this multimodal dataset to train a baseline multi-stage IL policy. The robot learns the high-level and safe baselines mirroring the expertise of a seasoned surgeon. Phase B: Reinforcement Learning (RL) — Perfecting Dexterity at Scale Once the robot understands the basic motions via IL, RL is used to perfect its dexterity and adapt to unexpected anatomical variations. Massive Parallelization: Inside Isaac for Health, the digital twin is cloned into thousands of parallel environments. The robot undergoes millions of trial-and-error iterations simultaneously. Reward Shaping: The RL agent is mathematically rewarded for task efficiency and trajectory smoothness. It is strictly penalized for minimizing and avoiding critical structures like unintended blood vessels. Domain Randomization: Digital Twin Engineers randomly alter organ sizes, textures, lighting, and tissue stiffness in Omniverse to ensure the trained policy is robust enough to handle the vast physiological variations of real human bodies.
19 May 2026
