-transparent.png){kind=logo}
An irradiation system has been designed, using a neutron beam from a cyclotron, which optimises the uniformity of activation of calcium. Induced activity is measured in a scanning, shadow-shield whole-body counter. Calibration has been effected and reproducibility assessed with three different types of phantom. Corrections were derived for variations in body height, depth and fat thickness. The coefficient of variation for repeated measurements of an anthropomorphic phantom was 1.8% for an absorbed dose equivalent of 13 mSv (1.3 rem). Measurements of total body calcium in 40 normal adults were used to derive normalisation factors which predict the normal calcium in a subject of given size and age. The coefficient of variation of normalised calcium was 6.2% in men and 6.6% in women, with the demonstration of an annual loss of 1.5% after the menopause. The narrow range should make single measurements useful for diagnostic purposes.
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
November 1973,
International journal of nuclear medicine and biology,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
September 1986,
Calcified tissue international,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
July 1972,
Journal of nuclear medicine : official publication, Society of Nuclear Medicine,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
May 2000,
Annals of the New York Academy of Sciences,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
January 1998,
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
May 1990,
Physics in medicine and biology,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
February 1987,
Physics in medicine and biology,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
July 1970,
The Journal of laboratory and clinical medicine,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
April 1968,
Physics in medicine and biology,
N S Kennedy, and
R Eastell, and
C M Ferrington, and
J D Simpson, and
M A Smith, and
J A Strong, and
P Tothill
October 1970,
Journal of nuclear medicine : official publication, Society of Nuclear Medicine,
