Kinect Surface Tracking

A cost effective method for evaluating patient motion during external beam radiotherapy has been developed. This system consists of a 3D depth camera and tracking software. The system was tested using a range of custom built phantoms and motion platforms. Kinect v1 and v2 sensors were chosen for this project due to their low cost and high resolution as compared to other depth cameras. Various tracking algorithms were evaluated to determine the optimal method for the system. Testing determined that the Kinect v2 was the more suitable sensor primarily due to the significantly lower depth variation of 0.6mm as compared to the Kinect v1 of 2.4mm. An analysis of tracking methods was performed and concluded that the least squares method provides the most accurate tracking in the clinical environment. This method is able to determine an object’s actual position accurate to 1.5mm 66% of the time