Camera Augmented Mobile C-Arm (CAMC): Calibration, Accuracy Study, and Clinical Applications

—Mobile C-arm is an essential tool in everyday trauma and orthopedics surgery. Minimally invasive solutions, based on X-ray imaging and coregistered external navigation created a lot of interest within the surgical community and started to replace the traditional open surgery for many procedures. These solutions usually increase the accuracy and reduce the trauma. In general, they introduce new hardware into the OR and add the line of sight constraints imposed by optical tracking systems. They thus impose radical changes to the surgical setup and overall procedure. We augment a commonly used mobile C-arm with a standard video camera and a double mirror system allowing real-time fusion of optical and X-ray images. The video camera is mounted such that its optical center virtually coincides with the C-arm’s X-ray source. After a one-time calibration routine, the acquired X-ray and optical images are coregistered. This paper describes the design of such a system, quantifies its techn...

• Type: Journal
• Year: 2010
• Where: TMI
• Authors: Nassir Navab, Sandro Michael Heining, Jörg Traub
• Keywords: TMI 2010, X-ray, X-ray Image, X-ray Source