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Proceedings Paper

System Toward Automation in Radiotherapy Treatment: START
Author(s): Andrew Y. S. Cheng; Kenneth Yik Pan Tsoi
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Paper Abstract

START is a new automation system invented for nasopharyngeal carcinoma treatment. A laser scanner system capable of non-contact digitization of 3D surface is used to digitize the contours of the patient's face, shoulder and special landmark reference features of the patient. These features are stored in the computer in 3D digitized format. The digitized facial features with traced landmark reference features are used for fabrication of a true sized wood-particle laminates mould by a computer numerical controlled milling system. A Cobex mask is formed on this mould by using vacuum forming technique. With an image analysis and computer aided design system, the X-ray film with treatment window marked is traced automatically and converted to match the prescanned 3D information. A computer controlled 6-axis robot can precisely mark out the required areas on the Cobex cast for treatment. Finally, the patient receives radiotherapy treatment with the Cobex case as a positioning registration device. The new system will replace the manual procedure with better patient comfort, higher efficiency and enhanced accuracy.

Paper Details

Date Published: 6 October 1994
PDF: 9 pages
Proc. SPIE 2355, Sensor Fusion VII, (6 October 1994); doi: 10.1117/12.189053
Show Author Affiliations
Andrew Y. S. Cheng, City Polytechnic of Hong Kong (Hong Kong)
Kenneth Yik Pan Tsoi, City Polytechnic of Hong Kong (Hong Kong)


Published in SPIE Proceedings Vol. 2355:
Sensor Fusion VII
Paul S. Schenker, Editor(s)

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