BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 25 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

Mo/Mo 25 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 28 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

Mo/Mo 28 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 30 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

Mo/Mo 30 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 35 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

Mo/Mo 35 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     Mo/Mo 25 kV, Mo/Mo 28 kV, Mo/Mo 30 kV, Mo/Mo 35 kV,

                                          W/Mo 23 kV, W/Mo 28 kV, W/Mo 30 kV, W/Mo 35 kV and W/Mo 50 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

 

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 23 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

W/Mo 23 kV
Di  (mGy/Gy)
Participating institutes

Radiation qualities     W/Mo 28 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

W/Mo 28 kV
Di  (mGy/Gy)
Participating institutes

Radiation qualities     W/Mo 30 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

W/Mo 30 kV
Di  (mGy/Gy)
Participating institutes

Radiation qualities     W/Mo 35 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

W/Mo 35 kV
Di  (mGy/Gy)
Participating institutes

Radiation qualities     W/Mo 50 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

W/Mo 50 kV
Di  (mGy/Gy)
Participating institutes

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     Mo/Mo 25 kV, Mo/Mo 28 kV, Mo/Mo 30 kV, Mo/Mo 35 kV,

                                          W/Mo 23 kV, W/Mo 28 kV, W/Mo 30 kV, W/Mo 35 kV and W/Mo 50 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

 

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 25 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
PTB -0.9 7.4
NIST -2.6 6.4
VNIIM -3.7 4.8
VSL -5.6 12
BEV -4.0 6.8
CMI 2.8 7.0
NIM 0.1 5.6
NMIJ -5.5 7.2
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 28 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
PTB -0.6 7.4
NIST -3.2 6.4
VNIIM -3.0 4.8
VSL -4.6 12.0
BEV -3.5 7
CMI 2.4 7.0
NIM -0.4 5.6
NMIJ -4.4 7.2
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 30 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
PTB -0.9 7.4
NIST -3.4 6.4
VNIIM -2.7 4.8
VSL -5.3 12.0
BEV -3.5 7
CMI 2.7 7.0
NIM 0.0 5.6
NMIJ -4.8 7.2
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation quality        Mo/Mo 35 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
PTB -0.5 7.4
NIST -3.8 6.4
VNIIM -2.8 4.8
VSL -4.7 12.0
BEV -2.5 7
CMI 2.5 7.0
NIM 0.2 5.6
NMIJ -4.3 7.2
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     Mo/Mo 25 kV, Mo/Mo 28 kV, Mo/Mo 30 kV, Mo/Mo 35 kV,

                                          W/Mo 23 kV, W/Mo 28 kV, W/Mo 30 kV, W/Mo 35 kV and W/Mo 50 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

 

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 23 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
ENEA-INMRI -3.8 9.6
NRC -0.7 6.4
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 28 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
ENEA-INMRI -3.2 9.6
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 30 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
ENEA-INMRI -2.9 9.6
NRC -1.4 6.4
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 35 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
ENEA-INMRI -2.8 9.6
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 50 kV

 

Degrees of equivalence represented by Di = (xI - xR)/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
NRC -2.1 6.4
Participating institutes
BIPM.RI(I)-K7

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     Mo/Mo 25 kV, Mo/Mo 28 kV, Mo/Mo 30 kV, Mo/Mo 35 kV,

                                          W/Mo 23 kV, W/Mo 28 kV, W/Mo 30 kV, W/Mo 35 kV and W/Mo 50 kV

 

Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.

 

Comparison
Comparison close
BIPM comparison
Linked comparison
BIPM.RI(I)-K7
Metrology area, Sub-field Ionizing Radiation, Section I (x and gamma rays, electrons)
Description Measurement of air kerma in mammography beams
Time of measurements 2007 -
Status Continuous, approved for equivalence
References

Technical Protocol for ongoing BIPM Dosimetry comparisons

Measurand Air kerma (in mGy) relative to the BIPM evaluation
Parameters Radiation type: mammography radiation beams
Transfer device Ionization chambers
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 17 November 2011
Last update on 24 November 2021
 
Pilot institute BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person C. Kessler

+33 (0) 1 45 07 70 84
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

CMI

Czech Metrology Institute, Czechia, EURAMET

ENEA-INMRI

Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET

NIM

National Institute of Metrology, China, APMP

-

NIST

National Institute of Standards and Technology, United States, SIM

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

NRC

National Research Council, Canada, SIM

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

VNIIM

D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET

VSL

VSL, Netherlands, EURAMET

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     Mo/Mo 25 kV, Mo/Mo 28 kV, Mo/Mo 30 kV, Mo/Mo 35 kV

 

For a comparison with laboratory i, the key comparison reference value is the BIPM air-kerma determination xR,i and its standard uncertainty uR,i.

The degree of equivalence of laboratory i with respect to xR,i is given by a pair of terms: Di and Ui = 2 ui, its expanded uncertainty (k = 2), both expressed in mGy/Gy.
In evaluating ui for BIPM comparisons, account is taken of correlation between uLab i and uR,i (see the relevant Final Report).

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms: Dij = Di - Dj and Uij = 2uij, its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij, account should be taken of correlation between ui and uj

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 23 kV, W/Mo 28 kV, W/Mo 30 kV, W/Mo 35 kV and W/Mo 50 kV

 

For a comparison with laboratory i, the key comparison reference value is the BIPM air-kerma determination xR,i and its standard uncertainty uR,i.

The degree of equivalence of laboratory i with respect to xR,i is given by a pair of terms: Di and Ui = 2 ui, its expanded uncertainty (k = 2), both expressed in mGy/Gy.
In evaluating ui for BIPM comparisons, account is taken of correlation between uLab i and uR,i (see the relevant Final Report).

When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms: Dij = Di - Dj and Uij = 2uij, its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij, account should be taken of correlation between ui and uj

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     Mo/Mo 25 kV, Mo/Mo 28 kV, Mo/Mo 30 kV, Mo/Mo 35 kV

 

Lab i      relative standard uncertainty of air kerma determined by Lab i
xi
            air kerma determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard
ui            combined standard uncertainty of xi taking correlations into account

 

Radiation quality Mo/Mo 25 kV

 

Radiation quality Mo/Mo 28 kV

 

Radiation quality Mo/Mo 30 kV

 

Radiation quality Mo/Mo 35 kV

BIPM.RI(I)-K7

MEASURAND                 Air kerma

Radiation qualities     W/Mo 23 kV, W/Mo 28 kV, W/Mo 30 kV, W/Mo 35 kV and W/Mo 50 kV

 

 

Lab i      relative standard uncertainty of air kerma determined by Lab i
xi
            air kerma determined by Lab i at the BIPM, relative to the reference value determined by the BIPM standard
ui            combined standard uncertainty of xi taking correlations into account

 

Radiation quality W/Mo 23 kV

 

Radiation quality W/Mo 28 kV

 

Radiation quality W/Mo 30 kV

 

Radiation quality W/Mo 35 kV

 

Radiation quality W/Mo 50 kV