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. 1977 Sep;22(5):831-5.
doi: 10.1088/0031-9155/22/5/002.

In vivo determination of nitrogen using Pu-Be sources

J R Mernagh, J E Harrison, K G McNeill

In vivo determination of nitrogen using Pu-Be sources

J R Mernagh et al. Phys Med Biol. 1977 Sep.

Abstract

A mehtod of measuring body nitrogen by neutron capture gamma analysis is described. The neutron flux is provided by four collimated 5 Ci Pu-Be sources, placed to give a bilateral irradiation of the subject. The 10-83 MeV thermal neutron capture gamma rays from 14N are detected by two heavily shielded 5 in X 4 in NaI(Tl) detectors. Results indicate a reproducibility +/-3% (1 SD) for a 10 min irradiation of the chest area, while giving a radiation dose equivalent of 50 mREM.

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