2 results about "Surgical margin" patented technology

The application provides a pathological section and MRI image registration method and device based on biomechanical elastic deformation, which comprises the following steps: obtaining a three-dimensional digital twin of a tumor region, obtaining a digital resection region in the three-dimensional digital twin based on a preset surgical margin; performing ex vivo dynamics simulation on the digital resection region to obtain a tissue deformation result; obtaining an optimal deformation section with maximum mutual information in the tissue deformation result and a pathological section; obtaining an inverse transformation deformation field between the optimal deformation section and the three-dimensional digital twin, and projecting a tumor region edge of the pathological section to the three-dimensional digital twin based on the inverse transformation deformation field. The scheme realizes fine local nonlinear adaptation of the section by constructing an ex vivo dynamics finite element simulation technology of a volume shrinkage function and performing local deformation with the pathological section edge information as a constraint, quantitatively restoring the global non-uniform shrinkage of the ex vivo tissue and the differential local deformation of the tumor and normal tissue.

This invention relates to the field of medical device technology. This application discloses a surgical margin positioning device for rectal tumor surgery, including a travel hole and a travel groove. The travel hole and travel groove are distributed in a ring array. A travel rod is movably installed inside the travel hole. A mating hole is opened at the top of the travel rod. Sliding grooves are opened on both sides of the outer surface of the mating hole. A push rod is movably installed inside the sliding groove. A spring is provided at the top of the outer surface of the push rod, and the top of the spring is connected to the top of the inner wall of the travel rod. During the upward movement of the travel rod, it drives the travel rod, the ratchet rack, and the first side plate to move upward simultaneously, thereby driving the outer ring frame to move away from the main body, thus realizing the distance between the first positioner and the second positioner. This allows the operator to adjust the distance between the first positioner and the second positioner according to the size of the tumor inside the rectum. The tumor can be located with a single marking, improving the ease of operation of the device.