PMID: 18705612Aug 19, 2008Paper

A dosimetry intercomparison phantom for intraoperative radiotherapy

Zeitschrift für medizinische Physik
Kris Armoogum, Colin Watson

Abstract

Intraoperative radiotherapy (IORT) using very low kV x-rays is a promising new treatment modality and has proven to be effective for managing breast and neurological tumours. We have treated in excess of 75 patients using four Zeiss Intrabeam x-ray sources (XRS). To date there has been no published data of any dosimetric intercomparison of this type of x-ray source used at other cancer centres worldwide. This paper describes the design of a simple dosimetry intercomparison phantom for use with these very low kV x-ray sources. A prototype polymethyl methacrylate (PMMA) phantom has been manufactured, the dimensions of which were determined by the dimensions of the XRS, the beam energy and the attenuating properties of PMMA. The phantom is used in conjunction with Gafchromic XR Type-R film (GC-XRR) and its purpose is to measure the absorbed dose at a fixed distance from the effective point source at the tip of the XRS. The utility of this phantom is further enhanced through the use of an interlock, which eliminates the need to use the mobile gantry. We have used this phantom to conduct a qualitative dosimetric intercomparison of four Zeiss Intrabeam x-ray sources with positive results. This phantom is low cost, easy to manufacture...Continue Reading

References

Nov 1, 1993·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·J C HoriotH Bartelink
Feb 24, 2001·The British Journal of Radiology·K VenablesUNKNOWN START Trial Management Group
Aug 30, 2002·The British Journal of Radiology·S W Blake, M P Casebow
Apr 6, 2005·Seminars in Radiation Oncology·Jayant S VaidyaDavid Joseph
Jul 21, 2005·Physics in Medicine and Biology·Martin J ButsonPeter K N Yu

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Citations

Oct 18, 2013·The British Journal of Radiology·D J EatonN Dancer
Dec 10, 2009·Zeitschrift für medizinische Physik·Petra Maria HärtlMarius Treutwein
Nov 18, 2009·Journal of Applied Clinical Medical Physics·Martin A EbertSalim A Siddiqui
Feb 15, 2017·Radiation Oncology·Frank W Hensley

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