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 | 1983 - |
| Status | Continuous, approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | SIR equivalent activity |
| Transfer device | Radioactive solution |
| 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 Last update: 08 December 2016 BIPM.RI(II)-K4.Tc-99m results are linked to those of BIPM.RI(II)-K1.Tc-99m SIR equivalent activity of radionuclide 99mTc |
| 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 |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2002 |
| IRA |
Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET |
| 1993 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 1998 | |
| 2007 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 2005 | |
| 2008 |
| OMH |
Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET |
| 2002 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1985 | |
| 2005 |
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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 | |||
| BEV | 155 650 | 1 300 | 2002-11-12 | |
| MKEH | 154 400 | 1 600 | 2002-12-11 | |
| 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 |
