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Verification of dose calculations with a treatment planning system for open and wedged fields of a 60Co unit with a new asymmetric collimator by Jack L.M Venselaar; Herman W.J Bierhuizen; Piet-Hein Van Der Giessen is a Medicine article available to read on EtoBox.

What is Verification of dose calculations with a treatment planning system for open and wedged fields of a 60Co unit with a new asymmetric collimator about?

A Cobalt-60 treatment unit was equipped with a new collimator with asymmetrical capability of both the X-and Y-jaws. This new collimator design opens possibilities for treatment techniques with this apparatus, which, until now, were only achievable with linear accelerators. Before accepting the device and taking it into clinical routine, a dosimetric verification was performed, which compared results of dose measurements with the results of dose calculations of the treatment planning system. For this purpose, the approach of Report 55 of the AAPM Task Group 23 for testing a treatment planning system was followed, with modifications to comply with the asymmetrical settings of the fields. The study shows that criteria for acceptance of the treatment planning algorithm were met for the asymmetrical open fields and for asymmetrical fields with a 22°and a 45°wedge. However, deviations tended to be too high under the thick part of the thickest wedge.

Who reads Verification of dose calculations with a treatment planning system for open and wedged fields of a 60Co unit with a new asymmetric collimator?

Author

Jack L.M Venselaar; Herman W.J Bierhuizen; Piet-Hein Van Der Giessen

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0958-3947)

Published

2001

Language

EN

Field

Medicine (Health Sciences)