Computer Vision News - November 2021

49 3D Measurements in Robotic Assisted Surgery 2. Buffer Zones: 3. Temporal/Spatial Measurements: b. Other procedures can also benefit from detection of dimensional changes over time . Ablation procedures require total ablation of the regionwithminimal harm to the surrounding tissue. Analyzing the ablation radius (and radius change rate) in real time can assist in determining when the ablation is successful and prevent damage to surrounding tissue. a. When removing tumors, healthy tissue from around the tumor is also removed to verify a “negative margin” and prevent recurrence. Verifying that excision occurs at a constant distance from the tumor is challenging, therefore an objective measurement tool can assist in this task. Additionally, this buffer can be overlayed on the image given a manual segmentation of the tumor. a. During stitching, applying too little or too much tension on the sutures can have devastating effects. Assessing tension based on images only is difficult, and there is no tactile feedback in RAS. Strain is defined as: b.Where L is the length of the suture as it is continuously measured throughout the stitching process. Positive strain means the suture is under tension, whereas negative strain means the suture is loose. Upper and lower strain limits can be defined to provide proper feedback to the surgeon. Accurate measurements are an objective assessment method to the success of a procedure. In real life we have intuition regarding the size of objects. In the surgical setting this intuition is difficult to achieve and implementing AI modules can replace the lack of intuition, ultimately improving procedural outcome and increasing patient safety . Read more about Robotic Assisted Surgery: https://www.rsipvision. com/surgical-robotics/