Page 166 of Radiation Medicine QA Solutions 2008/2009 by PTW

health physics radiological calibration services calibration service laboratory calibration service facilities ptw-freiburg operates an accredited secondary standard dosimetry laboratory for radiological measuring quantities ptw-freiburg is a member of the iaea international ssdl network and the german calibration service dkd the calibrations are directly traceable to the primary standards of bipm bureau international de poids et mesure paris ptb-braunschweig german federal institute of physics and metrology nine calibration facilities for various radiation qualities measuring quantities and dose rate ranges are available upgrade to 12 units in 2008 regular external audits are performed by ptb the calibration laboratory has been a most important part of ptw-freiburg since its first days the task to produce accurate dosimetric instrumentation implies the necessity to provide accurate calibration ptw-freiburg operates germany s first secondary standard dosimetry laboratory for radiation quantities accredited by the dkd german calibration service under direct supervision of the national laboratory it operates as an adcl accredited dosimetry calibration laboratory and it is also a member of the international ssdl network organized by the international atomic energy agency iaea with nine calibration benches in continual use the ptw calibration lab is one of the most active calibration labs for ionizing radiation in the world the following radiation therapy beam qualities can be calibrated 60co 1.3 mev 137cs 662 kev x-rays 70 280 kv soft x-rays 10 70 kv in addition well-type chambers can be calibrated to measure brachytherapy sources besides the therapy dosimetry calibrations the ptw lab provides for dose and non-invasive kv calibrations in diagnostic imaging nuclide radioactivity calibrations of isotope calibrators in nuclear medicine and calibrations of health physics dosimetry equipment from 10 kv soft x-rays up to 1.3 mev 60co gamma radiation the nine calibration benches used for routine work 50 kv x-ray installations 2 units small mo anode mammo benches 23 kv to 35 kv and 25 kv to 45 kv for dosemeter and kv-meter calibration measuring quantities air kerma exposure 100 kv x-ray installation soft x-ray bench for therapy and radiation protection dosemeter calibrations in the range from 15 kv to 70 kv measuring quantities absorbed dose to water air kerma exposure 150 kv x-ray installation diagnostic x-ray facility for the calibration of dosemeters and kv-meters in different ranges from 40 kv to 150 kv measuring quantities air kerma exposure ppv 160 kv x-ray installation used for the calibration of dosemeters ct-chambers and dap meters in different ranges from 10 kv to 150 kv measuring quantities air kerma exposure absorbed dose to water ambient dose equivalent h 10 280 kv x-ray installation therapy x-ray bench for therapy and radiation protection dosemeter calibrations in different ranges from 60 kv to 280 kv measuring quantities absorbed dose to water air kerma exposure ambient equivalent dose 300 kv x-ray installation custom x-ray bench for the calibration of therapy radiation protection and diagnostic dosimeters ct-chambers and dap meters in different ranges from 40 kv to 300 kv measuring quantities absorbed dose to water air kerma exposure and ambient equivalent dose 137cs installation isotope calibration facility for function tests and the calibration of radiation protection and afterloading detectors measuring quantities absorbed dose to water air kerma exposure ambient equivalent dose installation isotope calibration facility for the calibration of therapy and radiation protection dosemeters linear and planar detector arrays and reference irradiations of tld probes measuring quantities absorbed dose to water air kerma exposure ambient equivalent dose 60co 166

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