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Proceedings Paper

The Application Of Computed Tomographic (CT) Imaging To Radiotherapy Planning
Author(s): J. J. Battista; J. Van Dyk; W. D. Rider; J. R. Cunningham
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Paper Abstract

X-ray transmission computed tomography (CT) has been used primarily in medical diagnostic radiology since 1972. More recently, the application of CT to radiation therapy planning has been developed. In comparison to conventional radiography, CT images provide vastly improved anatomical localization of the tumour and of surrounding healthy tissue. Qualitatively, this information assists in the selection of appropriate radiation fields. Quantitatively, CT data can be processed to yield the electron densities of the tissues for calculation of the corresponding radiation distribution in the patient. In such calculations, the variations in tissue density and the three dimensional nature of structures are considered by employing a series of contiguous transverse section CT images which cover the entire patient volume to be irradiated. In this paper, the utilization of computed tomography for radiotherapy planning and for monitoring tissue response following radiotherapy will be demonstrated with a clinical example (tumour of the chest wall). The results presented were obtained with a computerized treatment planning system (TP-11, Atomic Energy of Canada) modified to interact with a commercial CT scanner (TR-40 Synerview, Picker X-ray Corporation). This system has been in clinical use for the past six months at the Princess Margaret Hospital.

Paper Details

Date Published: 6 July 1979
PDF: 8 pages
Proc. SPIE 0173, Application of Optical Instrumentation in Medicine VII, (6 July 1979); doi: 10.1117/12.957163
Show Author Affiliations
J. J. Battista, The Ontario Cancer Institute (Canada)
J. Van Dyk, The Ontario Cancer Institute (Canada)
W. D. Rider, The Ontario Cancer Institute (Canada)
J. R. Cunningham, The Ontario Cancer Institute (Canada)

Published in SPIE Proceedings Vol. 0173:
Application of Optical Instrumentation in Medicine VII
Joel E. Gray, Editor(s)

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