title: Calibration of the Brookhaven National Laboratory delayed gamma neutron activation facility to measure total body calcium.
abstract: Differences in body size and shape can cause large variances in the in vivo results of neutron activation analysis. To introduce corrections for body size for the delayed gamma neutron activation facility at Brookhaven National Laboratory, "reference man"-sized and "reference woman"-sized phantoms were constructed. Simulation results using the Monte Carlo Neutron and Photon Transport code also provided correction factors for people of different sizes. For individuals with a body mass index (BMI = weight (kg)/height (m)2) between 20 and 30, no correction was required. At BMIs greater than 30, the effects of neutron attenuation were significant and a correction factor of CF = -0.0192 x BMI + 1.5635 can be applied.
authors.affiliation: Medical Department, Brookhaven National Laboratory, Upton, New York 11973, USA. ma2@bnl.gov
authors.forename: R
authors.initials: R
authors.lastname: Ma
authors.forename: I E
authors.initials: IE
authors.lastname: Stamatelatos
authors.forename: S
authors.initials: S
authors.lastname: Yasumura
mesh_terms: D001823:Body Composition; D001824:Body Constitution; D015992:Body Mass Index; D002118:Calcium / Q000032:analysis*; D002138:Calibration; D005260:Female; D006801:Humans; D008297:Male; D009010:Monte Carlo Method; D009501:Neutron Activation Analysis; D019047:Phantoms, Imaging; D012016:Reference Values
chemical_list: D002118:Calcium