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System and Method for Calibration for Image-Guided Surgery

Current surgical procedures often require the use of imaging systems to help guide physicians during invasive surgical operations. Ultrasound imaging, as well as pre-operative CT and MRI images, are the most commonly used imaging systems for guiding physicians during surgery. While CT and MRI imaging provide excellent definition of soft tissue and lesions, neither is well suited for guiding surgery in an operating room. Ultrasound imaging systems are far less expensive, more portable, and more compatible with the operating room environment, but do not always resolve or correctly identify lesions.

Dartmouth engineers and surgeons have developed a system and method for generating semi real-time composite images by calibrating and coregistering operating-room ultrasound images to pre-operative CT and/or MRI images. The ultrasound images are transformed to describe planar surfaces and coregistered to prior CT and/or MRI images. The images are displayed (e.g., to a surgeon in the operating room) and updated as surgery proceeds and the ultrasound scanhead is moved.

Due to the semi real-time dynamic nature of this innovative imaging technique, a surgeon may easily and reliably locate and treat lesions identified in a CT and/or MRI image. By combining the high resolution imaging techniques of CT and MRI with the ease of use and portability of Ultrasound, this improved and innovative method for surgical imaging effectively and reliably guides physicians during surgery. This new technique is a significant improvement in the field of image-guided surgery allowing for precise location of lesions and soft tissue during surgery.

This technology is claimed in pending patent applications. We are seeking an industrial partner for the continued development and commercialization of this technology. (Ref: J442)

Last Updated: 7/24/12