A survey of current in vivo radiotherapy dosimetry practice

The British Journal of Radiology
C R EdwardsP Rolfe

Abstract

A questionnaire was sent out to 57 radiotherapy physics departments in the United Kingdom to determine the type of dosemeters used for in vivo measurements inside and outside X-ray treatment fields, and whether any correction is made for energy dependence when the dose to critical organs outside the main beam is estimated. 44 responses were received. 11 centres used a semi-conductor for central axis dosimetry compared with only two centres which used thermoluminescent dosimetry (TLD). 37 centres carried out dosimetry measurements outside the main beam; 25 centres used TLD and 12 centres used a semi-conductor detector. Of the 16 centres measuring the dose at both sites. 11 used a semi-conductor for the central axis measurement, but only four of those 11 changed to TLD for critical organ dosimetry despite the latter's lower variation in energy response. None of the centres stated that they made a correction for the variation in detector energy response when making measurements outside the main beam, indicating a need for a more detailed evaluation of the energy response of these detectors and the energy spectra outside the main beam.

References

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Citations

Aug 12, 2014·The British Journal of Radiology·J M ParkJ-I Kim
Oct 31, 2007·The British Journal of Radiology·C R EdwardsA J Moloney
Jul 5, 2011·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Chang Seon LimGye Hwan Jin
Feb 17, 2017·The British Journal of Radiology·Niall D MacDougallAndrew Morgan
May 17, 2017·Journal of Cancer Research and Therapeutics·Ewelina KonstantyAnna Kowalik
Oct 29, 2004·Physics in Medicine and Biology·C R Edwards, P J Mountford
Dec 7, 2006·Physics in Medicine and Biology·C R EdwardsA J Moloney
Jan 22, 1998·Physics in Medicine and Biology·C R EdwardsP J Mountford

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