BIPM.RI(I)-K8 and APMP.RI(I)-K8
MEASURAND Air kerma
SOURCE HDR Ir-192 brachytherapy sources
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
a) results obtained using a thimble-type chamber
b) results obtained using a well-type chamber
BIPM.RI(I)-K8 and APMP.RI(I)-K8
MEASURAND Air kerma
SOURCE HDR Ir-192 brachytherapy sources
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
| VSL (a) | -12.7 | 12.2 | ||
| NPL (a) | -1.1 | 11.4 | ||
| PTB (a) | 0.3 | 19.8 | ||
| NRC (a) | -3.4 | 10.0 | ||
| NMIJ (b) | 3.6 | 10.8 | ||
| IAEA | 9.4 | 30.5 | ||
| INER | 10.1 | 19.6 | ||
| KRISS | 4.2 | 16.4 | ||
| NMISA | 7.3 | 30.5 | ||
| Nuclear Malaysia | -6.4 | 30.8 | ||
| PTKMR-BATAN | 40.8 | 34.3 |
a) results obtained using a thimble-type chamber
b) results obtained using a well-type chamber
| Metrology area, Sub-field | Ionizing Radiation, Section I (x and gamma rays, electrons) |
| Description | Measurement of reference air kerma rate for HDR Ir-192 brachytherapy sources |
| Time of measurements | 2009 - |
| Status | Continuous, approved for equivalence |
| References | |
| Measurand | Reference air kerma rate (in mGy/h) relative to the BIPM evaluation |
| Parameters | Radiation type: HDR Ir-192 sealed brachytherapy sources |
| Transfer device | BIPM ionization chambers: well-type and thimble-type |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | BIPM (Bureau International des Poids et Mesures) |
| Comments | The Final Report for each bi-lateral comparsion is listed in the tab "Participants" First results published on 13 September 2014 Most recent update: 20 October 2021 |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | C. Kessler +33 (0) 1 45 07 70 84 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 2015 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 2010 |
| NRC |
National Research Council, Canada, SIM |
| 2014 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2011 |
| VSL |
VSL, Netherlands, EURAMET |
| 2009 |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
BIPM.RI(I)-K8 and APMP.RI(I)-K8
MEASURAND Air kerma
SOURCE HDR Ir-192 brachytherapy sources
The key comparison reference value is the BIPM evaluation of reference air kerma rate.
The degree of equivalence of each laboratory i with respect to the key comparison refernce value is given by a pair of terms both expressed in mGy/Gy: the relative difference Di and Ui = 2 ui, its expanded uncertainty (k = 2).
When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms, both expressed in mGy/Gy: Dij = Di - Dj and Uij, its expanded uncertainty (k = 2).
Linking APMP.RI(I)-K8 to BIPM.RI(I)-K8
The INSTITUTE provides the link between the key comparison COMPARISON IDENTIFIER and COMPARISON IDENTIFIER, having participated in both comparisons. The linking process is described in Section X of the COMPARISON IDENTIFIER Final Report.
BIPM.RI(I)-K8 and APMP.RI(I)-K8
MEASURAND Air kerma
SOURCE HDR Ir-192 brachytherapy sources
xi measurement result obtained by laboratory i relative to the KCRV
ui combined standard uncertainty of xi
BIPM.RI(I)-K8
-K8 Oct-2021 LIM.png)
APMP.RI(I)-K8
-K8 Oct-2021 LIM.png)
