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Historical Review of Lung Counting Efficiencies for Low Energy Photon Emitters

Jeffers, Karen L.; Hickman, David P.*

doi: 10.1097/HP.0b013e31829eff13

This publication reviews the measured efficiency and variability over time of a high purity planar germanium in vivo lung count system for multiple photon energies using increasingly thick overlays with the Lawrence Livermore Torso Phantom. The measured variations in efficiency are compared with the current requirement for in vivo bioassay performance as defined by the American National Standards Institute Standard in ANSI Standard N13.30.

Health Phys. 106(3):000-000; 2014

*Lawrence Livermore National Laboratory, Livermore, CA 94551.

The authors declare no conflicts of interest.

For correspondence contact: Karen L. Jeffers, Lawrence Livermore National Laboratory, P.O. Box 808 L-383, Livermore, CA 94551, or email at

(Manuscript accepted 2 June 2013)

© 2014 by the Health Physics Society