David Thomas

Associate Professor

Curriculum vitae


Department of Radiation Oncology

University of Colorado Anschutz Medical Campus

Department of Radiation Oncology – University of Colorado Denver | Anschutz Medical Campus
1665 Aurora Court, Suite 1032
Mail Stop F706
Aurora, CO 80045

Benchmarking Trial begins

February 03, 2024

Marker based IR Tracking
We've started the process of benchmarking our Computer Vision patient alignment technique against the current gold standard - IR-marker motion tracking. 

In a 20 heathy-volunteer study, we will quantify and benchmark our AI technique using optical only imaging.
Each volunteer will participate in a gold standard marker-based motion capture collection in the Interdisciplinary Movement Science Laboratory on the Anschutz Medical Campus. We record whole-body motion during replication of clinical breast RT positioning during free breathing, thoracic DIBH, and abdominal DIBH. Motion will be captured using 3-D position data from reflective markers measured from 10 infrared cameras (Fs = 100 Hz) (the gold standard for motion tracking). Simultaneously, we will acquire artificial intelligence (AI) human pose tracking using 6-10 synchronized cameras. The accuracy of our technique will be quantified against the motion capture gold-standard, and the optimum positioning and minimum number of cameras required to match current state of the art positioning accuracy will be identified. In a second optical-only imaging study, the volunteers will be imaged with current state-of-the-art surface guided imaging, with simultaneous AI human pose tracking will be recorded, and the resulting measurements compared.


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