The UW Radiation Calibration Laboratory (UWRCL) is accredited to ISO/IEC 17025:2005 by the American Association for Laboratory Accreditation (A2LA) for the all services. The UWRCL provides the highest quality and most comprehensive calibration and related services in the industry.
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Parameter / Equipment | Range | Best Uncertainty* (±) | Technique or Reference Standard |
Therapy Class Ionization Chambers |
NIST calibrated reference class ionization chambers; 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. |
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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% |
Non-Invasive kVp Meters | ||||
Diagnostic Mammography |
50 kVp - 250 kVp 23kVp - 35 kVp |
1.1% 1.1% |
NIST-traceable voltage divider calibration | |
Radiation Protection Survey Instruments | ||||
137Cs Exposure | 0.02 mR/hr - 20 R/hr | 6.5% | NIST-calibrated reference class ionization chamber used to calibrate the radiation beam air kerma or exposure rate | |
TLD, Radiochromic Film, and Artifact Irradiation |
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60Co Air Kerma 137Cs Air Kerma X-ray Air Kerma
High Energy photons (6 - 18MV) and electrons (4-16MeV) |
Up to 150 cGy/min Up to 20 cGy/min 20-250 kVp
Up to 2400 cGy/min
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2.5% 2.5% 2.5%
2.5%
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NIST-calibrated reference class ionization chambers calibrated in reproduced beams using replacement technique | |
* Best Uncertainties represent expanded uncertainties using a coverage factor of k=2 which provides a level of confidence of approximately 95%. ** The UWRCL 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. |