BIPM.RI(II)-K1.Tc-99m and BIPM.RI(II)-K4.Tc-99m
MEASURAND Equivalent activity of Tc-99m
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.
Results given in absolute values.
MEASURAND Equivalent activity of Tc-99m
Degrees of equivalence represented by Di = (xI - xR) /xR and its expanded uncertainty Ui /xR at a 95 % level of confidence, both expressed in kBq/MBq.
Results given in relative values.
BIPM.RI(II)-K1.Tc-99m and BIPM.RI(II)-K4.Tc-99m
MEASURAND Equivalent activity of Tc-99m
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in MBq.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
MBq |
MBq |
MBq |
||
| PTB | -0.4 | 1.3 | ||
| LNE-LNHB | 0.1 | 1.6 | ||
| NPL | 0.2 | 1.6 | ||
| NIST | -0.2 | 1.4 | ||
| KRISS | 1.0 | 2.7 | ||
| NMIJ | -0.7 | 2.3 | ||
| NIM | 0.0 | 2.4 | ||
| CNEA | 7.1 | 4.3 | ||
| LNMRI/IRD | 1.6 | 3.3 | ||
| IFIN-HH | -2.2 | 2.9 | ||
| VNIIM | 3.5 | 4.8 | ||
| ENEA-INMRI | -2.3 | 1.5 | ||
| NMISA | 3.0 | 4.3 | ||
| POLATOM | 1.5 | 2.4 | ||
| NRC | -0.6 | 2.9 | ||
| ANSTO | 0.4 | 2.7 |
Results given in absolute values.
MEASURAND Equivalent activity of Tc-99m
Degrees of equivalence represented by Di = (xI - xR) /xR and its expanded uncertainty Ui /xR at a 95 % level of confidence, both expressed in kBq/MBq.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
kBq/MBq |
kBq/MBq |
kBq/MBq |
||
| PTB | -2.3 | 8.4 | ||
| LNE-LNHB | 1 | 10 | ||
| NPL | 2 | 11 | ||
| NIST | -1 | 10 | ||
| KRISS | 7 | 18 | ||
| NMIJ | -4 | 15 | ||
| NIM | 0 | 15 | ||
| CNEA | 47 | 28 | ||
| LNMRI/IRD | 11 | 22 | ||
| IFIN-HH | -14 | 19 | ||
| VNIIM | 23 | 32 | ||
| ENEA-INMRI | -15 | 10 | ||
| NMISA | 20 | 28 | ||
| POLATOM | 10 | 15 | ||
| NRC | -4 | 19 | ||
| ANSTO | 3 | 18 |
Results given in relative values.
| Metrology area, Sub-field | Ionizing Radiation, Section II (Measurement of Radionuclides) |
| Description | Activity of radionuclide Tc-99m |
| Time of measurements | 2009 - |
| Status | Continuous, approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | SIR-TI equivalent activity in kBq |
| Transfer device | SIR Transfer Instrument |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | BIPM (Bureau International des Poids et Mesures) |
| Comments | SIR: Système International de Référence, International Reference System SIR-TI: SIR Transfer Instrument Most recent update: 06 June 2023 Earlier reports and the status of not yet completed resulsts can be found in the participants list. Results older than 20 years are no longer considered valid (see pages 37 and 38 of the CCRI Report of its 18th meeting in 2003). |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | Carine Michotte +33 (0) 1 45 07 70 85 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| ANSTO |
Australian Nuclear Science and Technology Organisation, Australia, APMP |
| 2017 |
| BARC |
Bhabha Atomic Research Centre, India, APMP |
| CNEA |
National Commission of Atomic Energy, Argentina, SIM |
| 2012 |
| ENEA-INMRI |
Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET |
| 2014 |
| IFIN-HH |
"Horia Hulubei" National Institute of Research and Development for Physics and Nuclear Engineering, Romania, EURAMET |
| 2013 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 2010 |
| LNMRI/IRD |
Laboratorio Nacional de Metrologia das Radiacoes Ionizantes, IRD, Brazil, SIM |
| 2013 |
| NIM |
National Institute of Metrology, China, APMP |
| 2012 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 2009 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 2011 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| 2015 |
| NRC |
National Research Council, Canada, SIM |
| 2017 |
| POLATOM |
Radioisotope Centre Polatom, Poland, EURAMET |
| 2016 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 2021 |
Report in progress, draft B |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| 2014 |
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BIPM.RI(II)-K1.Tc-99m and BIPM.RI(II)-K4.Tc-99m
MEASURAND Equivalent activity of Tc-99m
Key comparison reference value: the SIR key comparison reference value xR for this radionuclide is xR = 153 060 kBq with a standard uncertainty uR = 330 kBq
(see Section 7 of the BIPM.RI(I)-K4.Tc-99m Final Report). The value xi is taken as the equivalent activity for a laboratory i.
The degree of equivalence of each laboratory i with respect to the reference value is given by a pair of terms:
Di = (xi - xR) and Ui its expanded uncertainty (k = 2), both expressed in MBq, and
Ui = 2((1 - 2wi)ui2 + u2R)1/2, where wi is the weight of laboratory i contributing to the calculation of xR.
The degrees of equivalence are also given in relative terms by Di = (xI - xR) /xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in kBq/MBq.
Linking BIPM.RI(II)-K4.Tc-99m to BIPM.RI(II)-K1.Tc-99m
The value xi is the SIRTI equivalent activity for laboratory i participant in BIPM.RI(II)-K4.Tc-99m multiplied by the linking factor to BIPM.RI(II)-K1.Tc-99m.
The degree of equivalence of laboratory i participant in BIPM.RI(II)-K4.Tc-99m with respect to the reference value is given by a pair of terms:
Di = (xi - xR) and Ui, its expanded uncertainty (k = 2), both expressed in MBq. The approximation Ui = 2(ui2 + uR2)1/2 is used in the table of degrees of equivalence.
These statements make it possible to extend the BIPM.RI(II)-K1.Tc-99m matrices of equivalence to all participants in the BIPM.RI(II)-K4.Tc-99m comparisons.
BIPM.RI(II)-K1.Tc-99m and BIPM.RI(II)-K4.Tc-99m
MEASURAND Equivalent activity of Tc-99m
xi result of measurement carried out in the SIR for the sample submitted by laboratory i, Labi
ui combined standard uncertainty of xi
BIPM.RI(II)-K1.Tc-99m
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| PTB | 152 710 | 640 | 2005-11-16 | |
| LNE-LNHB | 153 180 | 790 | 2007-03-06 | |
| NPL | 153 300 | 740 | 2008-02-05 |
BIPM.RI(II)-K4.Tc-99m
| Labi | xi | ui | Date of measurement | |
| kBq | kBq | |||
| NIST | 152 840 | 730 | May 2009 | |
| KRISS | 154 100 | 1 400 | Sep.2010 | |
| NMIJ | 152 400 | 1 100 | Sep. 2011 | |
| NIM | 153 100 | 1 200 | Mar. 2012 | |
| CNEA | 160 200 | 2 100 | Nov. 2012 | |
| LNMRI/IRD | 154 700 | 1 700 | July 2013 | |
| IFIN-HH | 150 900 | 1 400 | Nov. 2013 | |
| VNIIM | 156 600 | 2 400 | June 2014 | |
| ENEA-INMRI | 150 750 | 770 | Oct. 2014 | |
| NMISA | 156 100 | 2200 | Nov. 2015 | |
| POLATOM | 154 600 | 1200 | Oct. 2016 | |
| NRC | 152 500 | 1 500 | June 2017 | |
| ANSTO | 153 500 | 1 400 | Nov. 2017 |
