Method for Tracking a 2D-3D Registration During Motion and Computing Device

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This invention presents a method and computing system for continuously updating the alignment (registration) between a 3D image set and multiple 2D projection images (such as X-rays) of a specific target area within the body, even when the target (like an organ or bone) moves. It achieves this by tracking the movement of contour points along visible structures of a rigid object and using this information to refine the 2D-3D match in real time.

Use CasesContent extracted from patent full text and abstract with AI.

• Image-guided surgery, where maintaining alignment between 2D intraoperative images and preoperative 3D scans is critical
• Radiation therapy, to accurately target moving organs or tumors
• Orthopedic procedures involving bones, implants, or prosthetics that may shift during intervention
• Real-time monitoring in minimally invasive interventions
• Tracking the movement of medical devices within the body during diagnosis or treatment

BenefitsContent extracted from patent full text and abstract with AI.

• Improved accuracy in aligning 2D and 3D medical images despite patient or organ movement
• Reduced risk of errors during surgical or therapeutic procedures
• Enables safer and more effective targeting of areas for intervention
• Facilitates dynamic, real-time guidance in medical procedures
• Potential to reduce the amount of radiation exposure due to fewer repeated scans being needed

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Patent Abstract

Methods for updating a 2D/3D registration between a three-dimensional image data set corresponding to a target area subjected to a movement and a plurality of two-dimensional projection images of the target area include: selecting a plurality of contour points along a contour, the contour being visible in a first projection image and a three-dimensional image data set registered therewith, the plurality of contour points being associated with a rigid object in the target area; determining a displacement of each contour point of the plurality of contour points between the first projection image and a successively captured second projection image; obtaining movement information for each contour point of the plurality of contour points based on the determined displacement, the movement information describing a movement of the rigid object; and updating the registration based on the obtained movement information.