- Personal Radiation Monitoring Service
- Equipment Calibration and Testing
- Radioanalytical Services
- Hire of Radiation Meters
- Ultraviolet Radiation (UVR) Services
- UV Data
- Buyer's Guide for Sun Protection
- Radiation Safety Advice and Risk Evaluation
- Australian Clinical Dosimetry Service
- National Diagnostic Reference Level Service
- Australian National Radiation Dose Register
- Radiotherapy Calibrations
For more information please get in touch with ARPANSA
- Phone Number+61 3 9433 2220
- Fax Number
- email ACDS
ACDS - Level I Audits
LEVEL I AUDITS
At inception, the ACDS performed adopted ARPANSA’s existing Level I TLD audit. Following twelve months of investigations, the ACDS adopted an Optically Stimulated Luminescent Detector (OSLD) on 1 June 2012 for its Level I audit.
For the ACDS Level I audit, OSL detectors are mailed to the facility enclosed in PMMA blocks. Each photon beam within the facility being audited has a designated block with two OSLDs positioned side by side at approximately dmax. The photon block is placed on a provided platform to reduce scatter effects from the table. The platform is not necessary for electrons as the electron block provides full scatter. The electron block consists of three stacked outer rings and a central acrylic plugs containing the OSLD.
the foreground. The photon support platform is shown
assembled at the back right. The full audit instructions
can be downloaded below.
For both photon and electron audits the facility delivers 100 MU to the OSLD. For each energy, the facility states the absorbed dose to water that would have been delivered to the dose output specification point (DOSP) if the 100 monitor units had been delivered to a water phantom under the facility’s reference conditions. This determination should include the daily output variation, as determined by the facility’s routine protocol for weekly/monthly output checks. At the time of measurements a facility representative should complete, sign and date the ACDS form for this, which is included in the audit kit. The ACDS places no requirement on determination of the stated dose output. However to achieve the best possible comparison it is recommended the measurements be performed with an ionization chamber and ultimately be traceable to the local reference dosimetry.
The irradiated OSLD are couriered back to the ACDS in the satchel provided and are read out between one week and one month post-irradiation. After evaluation, the participating centre will be provided with a written report detailing the difference between the beam output/quality stated for each beam compared to the ACDS measured beam output/quality. The full audit details can be downloaded below.
ACDS has produced two instructional videos to assist facility staff prepare for OSLD Level I Audits.
Photon Beams OSLD Level I Audit
Electron Beams OSLD Level I Audit
ACDS Audit Level I Documentation
- Level I Feedback: PDF 156 kb | DOC 154 kb
- OSD Facility Instructions: PDF 458 kb | DOCX 2.7 mb
- Level I Block Factors Explained: PDF 114 kb | DOC 299 kb
- OSL Audit Fact Sheet: PDF 235 kb | DOC 161 kb
Adobe Acrobat Reader is needed to view PDF files
The free Adobe Acrobat Reader is available from Adobe's website