Measurements of exhaled 37-Ar produced by total-body neutron irradiation of 40-Ca were
used to determine total-body calcium in 16 human subjects. There was a good correlation …

METHOD Production and decay of radioactive argon. Both 3TAr and 41Ar are produced
during fast-neutron irradiation of calcium. The nuclear reaction, stable calcium isotopic …

A technique to measure total body calcium using the 40 Ca (n, alpha) 37 Ar reaction has
been developed. The technique is based on collecting 37 Ar exhaled in the breath following …

A low dose method for measuring the calcium content of a human subject in vivo is
described. This method is pertinent to the diagnosis and monitoring during treatment of …

In vivo neutron activation followed by whole body counting has become-a routine method for
measuring the major elements in the body such as total body calcium. More recently a …

METHODS Fast neutrons (14 MeV) are produced by a neu tron generator* placed 5 m in
front of a patient irradiation enclosure. The enclosure is an aluminum water tank, 213 cm …

An in vivo neutron activation analysis (IVNAA) technique is used to measure calcium. When
the subject is irradiated with fast neutrons one of the reactions induced is 40 Ca (n, α) 37 Ar …

47Ca kinetic studies were performed in eight normal young adult males. Plasma, urinary
and faecal stable and radioactive calcium and wholebody radioactivity were measured for …

A study of the distribution of tracer doses of radiocalcium 47 in blood serum and urine for 5
days after its intravenous administration to human subjects is presented. Using atomic …

METHOD Each subject received a single impulse injection of Xe-i 33 dissolved in 1— 2ml
of saline. This was delivered into the cubital vein of the arm, the injec tion taking less than 15 …