0
2008 Design of Medical Devices Conference Abstracts

Vision-Based Patient Body Tracking in Helical Tomotherapy OPEN ACCESS

[+] Author and Article Information
Nathaniel Bird, Troy Dos Santos, Susanta Hui, Nikolaos Papanikolopoulos

 University of Minnesota, Minneapolis, MN, USA

J. Med. Devices 2(2), 027507 (Jun 11, 2008) (1 page) doi:10.1115/1.2932435 History: Published June 11, 2008

Abstract

Radiation therapy using state-of-the-art helical tomotherapy treatment is largely automatic after the doctor creates the dosage plan. The system currently has no method to detect if the patient moves out of alignment during treatment, a capability that could improve treatment accuracy. This cross disciplinary project combines the fields of computer vision with medical physics. The creation of a minimally invasive, vision-based, total-body tracker that can interact with the helical tomotherapy system to detect when a patient becomes misaligned has been explored. The tolerances are tight, by measuring when the patient moves just 5mm out of alignment, the uncertainty in radiation dose delivery can be greatly reduced. A stereoscopic vision system uses infrared reflective markers to track the patient. Using these data points, boney structures, such as the head, can be tracked independently, providing roll, pitch, and yaw information about their pose. Initial results compared vision-based patient-positioning tolerances with those of traditional megavoltage CT-scans. Simulation-based results have explored the efficacy of tracking large portions of the patient’s body.

Copyright © 2008 by American Society of Mechanical Engineers
This article is only available in the PDF format.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In