UWADCL Scope of Accreditation

The American Association of Physicists in Medicine (AAPM) accredits the UWADCL for the calibration of diagnostic and therapy radiation measurement instrumentation and radioactive sources. The UWADCL provides the highest quality and most comprehensive calibration service in the industry. The UWADCL is also accredited to ISO/IEC 17025 by the American Association for Laboratory Accreditation (A2LA).

Parameter / Equipment Range Best Uncertainty* (±) Technique or Reference Standard
Therapy Class Ionization Chambers

NIST calibrated 137Cs brachytherapy sources; reference class ionization chambers calibrated against NIST calibrated sources for short-lived isotopes such as 192Ir, 125I, 131Cs, and 103Pd.

NIST traceable air kerma rate for Electronic Brachytherapy Sources.

60Co Air Kerma Up to 150 cGY/min 1.5%
60Co Dose to Water Up to 150 cGy/min 1.4%
137Cs Air Kerma Up to 20 cGy/min 1.6%
X-rays 20-250 kVp 1.0%
Diagnostic Class Ionization Chambers
X-rays    
Tungsten Anode 20-250 kVp 1.9%
Molybdenum Anode 23-25 kVp 1.9%
Health Physics/Radiation Protection Ionization Chambers
60Co Air Kerma Up to 150 cGy/min 1.5%
137Cs Air Kerma Up to 150 cGy/min 1.6%
X-rays 20-250 kVp 1.9%
Well-type Ionization Chambers      (1U=1µGy/m2/hr)
HDR 192Ir Up to 50 kU 2.8%
137Cs, 131Cs, 125I, 103Pd, LDR 192Ir Up to 500U 2.4%
Electronic Brachytherapy Sources Up to5 mGy/sec 4.0%
Well-type Intravascular Ionization Chambers
90Sr Activity Up to 100 mCi 6.4% NIST traceable activity and absorbed dose to water source calibrations
90Sr Absorbed Dose Up to 200 mGy/s 15%
Radioactive Brachytherapy Sources
37Cs, 131Cs, 125I, 103Pd, LDR 192Ir Up to 500U 1.9% NIST calibrated 137Cs and 90Sr brachytherapy sources, reference class well-type ionization chambers calibrated against NIST calibrated sources for short-lived isotopes such as 192Ir, 125I, 131Cs, and 103Pd
Electrometers** Charge (25pC - 10 μC) 0.21% NIST traceable (A2LA accredited) capacitor calibration, voltage (through calibrated DMM), and period / time (through calibrated universal counters).
Current (1pA - 1000 nA) 0.21%

* Best Uncertainties represent expanded uncertainties using a coverage factor of k=2 which provides a level of confidence of approximately 95%.

** The UWMRRC has the capability to perform minor repairs or battery replacement for non-functioning electrometers. PLEASE CLICK HERE for more details. Please Note, Adobe Acrobat Reader version 5.0 is required to use the form. CLICK HERE to get the current version of Adobe Acrobat Reader.