NIST Updates Air-Kerma Standards and ADCL Calibration Coefficients

NIST Publications

Published March 3rd, 2026

Detected March 5th, 2026

Summary

The National Institute of Standards and Technology (NIST) has updated its air-kerma standards and ADCL calibration coefficients. These changes align with the adoption of recommendations from the International Commission on Radiation Units and Measurements (ICRU) Report 90.

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What changed

NIST has updated its air-kerma standards and Attix Dosimetry Calibration Laboratory (ADCL) calibration coefficients. This revision follows the adoption of recommendations from the International Commission on Radiation Units and Measurements (ICRU) Report 90, which provides updated guidance on radiation metrology.

While this document is primarily informational, entities that rely on NIST's calibration services or standards for radiation measurement, particularly in healthcare and manufacturing sectors, should review the updated coefficients. This ensures continued compliance with metrological standards and accurate radiation dosimetry. No specific compliance deadline is provided, but adherence to updated standards is implied for accurate and traceable measurements.

What to do next

Review updated NIST air-kerma standards and ADCL calibration coefficients.
Verify that internal calibration procedures and equipment align with the adopted ICRU 90 recommendations.

Source document (simplified)

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PUBLICATIONS

Changes to NIST Air-Kerma Standards and ADCL Calibration Coefficients Following Adoption of ICRU 90 Recommendations

Published

March 3, 2026

Author(s)

Michael Mitch

Abstract

N/A Citation AAPM Newsletter Volume 51 Issue 2 Pub Type Others

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Keywords

NIST, AAPM, ADCL, air-kerma standards, calibration coefficients, ICRU 90 Standards

Citation

Mitch, M.

(2026),
Changes to NIST Air-Kerma Standards and ADCL Calibration Coefficients Following Adoption of ICRU 90 Recommendations, AAPM Newsletter, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=961264       
  (Accessed March 5, 2026)