Comparison
Comparison close
Results

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.

Tc-99m
Di / MBq
Participating institutes

Results given in absolute 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 kBq/MBq.

Tc-99m
Di / (kBq/MBq)
Participating institutes

Results given in relative values.

Comparison
Comparison close
Results

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
BEV 2.6 2.7
MKEH 1.3 3.3
PTB -0.4 1.3
LNE-LNHB 0.1 1.6
NPL 0.2 1.7
NIST -0.3 1.5
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 4.9
ENEA-INMRI -2.3 1.6
NMISA 3.0 4.3
POLATOM 1.5 2.4
Participating institutes
BIPM.RI(II)-K1.Tc-99m
BIPM.RI(II)-K4.Tc-99m

Results given in absolute 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 kBq/MBq.

LABi Di Uneg,i Upos,i
kBq/MBq
kBq/MBq
kBq/MBq
BEV 17 18
MKEH 9 21
PTB -2.5 8.8
LNE-LNHB 1 10
NPL 1 11
NIST -2 10
KRISS 7 18
NMIJ -5 15
NIM 0 15
CNEA 46 28
LNMRI/IRD 11 22
IFIN-HH -14 19
VNIIM 23 32
ENEA-INMRI -15 10
NMISA 20 28
POLATOM 10 15
Participating institutes
BIPM.RI(II)-K1.Tc-99m
BIPM.RI(II)-K4.Tc-99m

Results given in relative values.

Comparison
Comparison close
BIPM comparison
Linked comparison
BIPM.RI(II)-K1.Tc-99m
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
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
BIPM

Bureau International des Poids et Mesures, BIPM - International Organization, N/A

BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

IRA

Institut Universitaire de Radiophysique Appliquée, Switzerland, EURAMET

LNE-LNHB

Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET

NPL

National Physical Laboratory, United Kingdom, EURAMET

OMH

Országos Mérésügyi Hivatal; Subsequently MKEH, now BKFH, Hungary, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

Comparison
Comparison close
Results

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 = 153 090 kBq with a standard uncertainty uR = 380 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 = (x- xR) and Uits 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-99 to BIPM.RI(II)-K1.Tc-99

The value xi is the SIRTI equivalent activity for laboratory i participant in BIPM.RI(II)-K4.Tc-99 multiplied by the linking factor to BIPM.RI(II)-K1.Tc-99.

The degree of equivalence of laboratory i participant in BIPM.RI(II)-K4.Tc-99 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 following table.

These statements make it possible to extend the BIPM.RI(II)-K1.Tc-99 matrices of equivalence to all participants in the BIPM.RI(II)-K4.Tc-99 comparisons

Comparison
Comparison close
Results

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 2 200 Nov. 2015
  POLATOM 154 600 1 200 Oct. 2016