Eye tracking system may modernize robotic surgeries

Colorado School of Mines Mechanical Engineering professor Xiaoli Zhang and graduate student Songpo Li have developed a gaze-contingent-controlled robotic laparoscope system that can help surgeons better perform laparoscopic surgery.

Laparoscopy is an operation performed in the abdomen or pelvis through small incisions with a camera. Laparoscopic instruments (typically 0.5-1 centimeters in diameter) are inserted through small incisions and then operated inside a patient’s body together with a laparoscope that allows the surgeon to see the surgical field on a monitor. Unlike open surgery, laparoscopic surgeries have reduced scarring, lessened blood loss, shorter recovery times and decreased post-operative pain. But due to limitations of holding and positioning the laparoscope, surgeons struggle with physiologic tremors, fatigue and the fulcrum effect.

Zhang and Li’s attention-aware robotic laparoscope aims to eliminate some of these physical and mental burdens.

“The robot arm holds the camera so the surgeon doesn’t have to,” Zhang said, noting that the camera is controlled effortlessly. “Wherever you look, the camera will autonomously follow your viewing attention. It frees the surgeon from laparoscope intervention so the surgeon can focus on instrument manipulation only.”

Their system tracks the surgeon’s viewing attention by analyzing gaze data. When the surgeon’s eyes stop on a new fixation area, the robot adjusts the laparoscope to show a different field of view that focuses on the new area of interest.

To validate the effectiveness of this procedure, the team tested six participants on visualization tasks. Participants reported “they could naturally interact with the field of view without feeling the existence of the robotic laparoscope.”

Zhang and Li anticipate that their technologies could have more than just healthcare applications, such as being used for the disabled and the elderly, who may have difficulty with upper-limb movements.

“Using this system, the surgeon can perform the operation solo, which has great practicability in situations like the battlefield and others with limited human resources,” Li said.

In mid September, Li received the Colorado Innovation S.T.A.R.S. challenge award for “Best Technical Achievement” at the college level during the JeffCo Innovation Faire. Zhang and Li are working with clinical researchers and industry partners to commercialize their attention-aware robotic laparoscope.

 

Contact:

Kathleen Morton, Communications Coordinator / 303-273-3088 / kmorton@mines.edu
Karen Gilbert, Director of Public Relations / 303-273-3541 / kgilbert@mines.edu

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