Clinical Oncology
Volume 19, Issue 9 , Pages 655-660, November 2007

Comparison of 50 kV Facilities for Contact Radiotherapy

Department of Clinical Physics and Bioengineering, University Hospital, Coventry, UK

Received 20 April 2007; accepted 15 July 2007.

ABSTRACT 

The radiation characteristics of a short source to surface distance (SSD) contact therapy tube in clinical use at the Centre Antoine-Lacassagne, Nice and a long SSD unit at the Clatterbridge Centre for Oncology were compared. The output from the tube at Nice had a dose rate of approximately double that of the tube at Clatterbridge, whereas the tube at Clatterbridge had a slightly higher value of the half value layer. Depth dose measurements were made with GafChromic MD55 film and SSD corrected depth dose curves showed good agreement between centres. Profiles at 2mm depth also showed comparable levels of flatness and uniformity.

Key words: Contact radiotherapy, papillon technique, radiochromic film, rectal cancer

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PII: S0936-6555(07)00724-8

doi:10.1016/j.clon.2007.07.005

Clinical Oncology
Volume 19, Issue 9 , Pages 655-660, November 2007

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