2 edition of Absolute measurement of whole body nitrogen by in-VIVO neutron activation analysis. found in the catalog.
Absolute measurement of whole body nitrogen by in-VIVO neutron activation analysis.
Thesis (Ph.D.)- Univ. of Birmingham, Dept. of Physics.
The introduction of the technique of in vivo total body neutron activation analysis (TBNAA) has made possible the precise and accurate measurement of total body calcium (TBCa). Since almost 99 percent of TBCa is in the skeleton, TBNAA gives a direct measurement of skeletal : S.H. Cohn, K.J. Ellis, D. Vartsky, I. Zanzi, J.F. Aloia. In vivo analysis of body elements by neutron activation is an important tool in medical research. It has provided a direct quantitative measure of body composition of human beings in vivo. Basic physiological differences related to age, sex, race, and body size have been assessed by this noninvasive technique.
Neutron activation analysis involves bombarding specimens with neutrons and then measuring the resultant: gamma rays. Which of the following is a non-destructive technique for identifying and quantifying trace elements in a test sample? We assessed TBPr in a longitudinal, observational study as height-adjusted nitrogen index (NI) using in vivo neutron activation analysis in adolescents with AN [mean ± SD age, ± y; body mass index (BMI, in kg/m 2), ± ] at the commencement of inpatient refeeding (T0), in 56 of these patients 7 mo thereafter as outpatients (T1), and in age-matched controls (C; n = 51, 15 Cited by: 2.
Neutron Activation Analysis Volume I 1st Edition by K. Heydorn (Author) ISBN Author: K. Heydorn. Neutron Activation Analysis (NAA) is one of the most sensitive analytical techniques used for multi-element analysis available today. The NAA procedure is capable of providing both quantitative and qualitative results for individual elements, with sensitivities that can be superior to those possible by any other analytical technique.
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Whole-body nitrogen was measured in man using a new technique of neutron-activation analysis. Patients were irradiated with a small dose of fast neutrons and the capture γ rays arising from neutron interactions with nitrogen nuclei were recorded.
Sixty-five patients with various diseases have been studied on by: The prompt gamma neutron activation facility measures total body nitrogen (TBN) with an accuracy and precision of + 3% in the anthropomorphic phantom.
A detailed description of the prompt gamma neutron activation technique for absolute measurement of whole body nitrogen. A two-way scanning method for total body in vivo neutron activation analysis J K Haywood, I Harris, K Boddy et al.-Reliability of absolute and relative measurement of total body nitrogen by the 14 N(n,2n) 13 N reaction J K Haywood, E D Williams, F J McArdle et al.-Recent citations A History of In Vivo Neutron Activation Analysis in Measurement.
For the measurement of total-body calcium, sodium, chlorine, nitrogen and phosphorus by in-vivo neutron activation analysis, there are two basic requirements.
First, it is necessary to achieve a uniform neutron flux through the human subject. It is also necessary to quantitatively measure the induced radionuclides in the body. In recent years in vivo neutron activation analysis has become a practical means of determining total body calcium content in living man.
The procedur Cited by: 1. Whole Body Counting and Neutron Activation Analysis A. Total body potassium B. Neutron activation analysis VII.
Dual-Energy X-ray Absorptiometry A. Absorptiometric principle B. Bone mineral measurements C. Triple-energy X-ray techniques VIII. Magnetic Resonance Imaging and Computed Tomography Total body nitrogen (TBN) is measured by in vivo prompt gamma neutron capture analysis.
Usually the background under the nitrogen peak is subtracted before calculating TBN from the ratio of nitrogen counts (at MeV) to hydrogen counts (at MeV). The hydrogen acts as an internal standard. On using cross-sectional data in normal prepubertal children 4–11 years of age, total body nitrogen measured by in vivo prompt gamma neutron capture analysis Cited by: Neutron activation analysis involves bombarding specimens with neutrons and then measuring the resultant: a.
X rays. Gamma rays. Beta particles. Alpha particles. Which of the following is a non-destructive technique for identifying and quantifying trace elements in a test sample. Carbon arc emission spectrometry. The Swansea in vivo neutron activation analysis (IVNAA) instrument, which is based on a 4 GBq Cf neutron source, has been developed primarily for the prompt-gamma measurement of total body (TB.
Part of the Serono Symposia USA book series (SERONOSYMP) It is more than 30 years since the first measurements of the elemental composition of the human body were undertaken (Anderson ) using the technique of in vivo neutron activation analysis (IVNAA).Cited by: 1. The calibration procedures required to permit both the sequential and the absolute quantitative measurement of total body calcium, chlorine, nitrogen, phosphorus and sodium, using a patient radiation dose of 1 rem, are described and the general principles of data handling are : Alexander T.
Elliott. body hydrogen as an internal standard in the measurement of nitrogen in vivo by prompt neutron capture gamma ray analysis J Radioanal Chem 9.
Kehayias, J.J., Ellis, K.J., Cohn, S.H., and Weinlein, J.H., Use of a high repetition rate generator for in vivo body composition measurements via neutron inelastic scattering,Author: R. Ma, Seiichi Yasumura, F.A. Dilmanian. Most elemental body composition reference data (level 1 model) for adults have been obtained using in vivo neutron activation analysis and whole body counting.
Although several research centers have contributed to this database (44, 59, ), much of the original data were obtained from one research laboratory (34 Cited by: A NEUTRON ACTIVATION ANALYSIS LABORATORY IAEA, VIENNA, IAEA-TECDOC ISSN FOREWORD This book is intended to advise in everyday practical problems related to operating a neutron activation analysis (NAA) laboratory.
It gives answers. A method for the measurement of total body calcium (TBCa) by prompt gamma neutron activation analysis has previously been described (Ryde et al.
f ). This involves irradiation with Cf neutrons and on-line detection of MeV gamma-rays resulting from neutron capture in CaAuthor: S J S Ryde, W D Morgan, J E Compston, A J Williams, C J Evans, A Sivyer, J Dutton.
Multi-element analysis of the obese subject by in vivo neutron activation analysis R A Siwek, L Burkinshaw, C B Oxby et al.-An introduction to body composition models used in nutritional studies A Mackie, W J Hannan and P Tothill-Estimating the composition of tissue gained or lost from measurements of elementary body compositionCited by: 9.
TOTAL BODY CALCIUM AS DETERMINED BY NEUTRON ACTIVATION ANALYSIS C.H. Chesnut III, W.B. Nelp and J.D. Denney Division of Nuclear Medicine, University Hospital, University of Washington, Seattle, Washington Knowledge of the pathophysiology and treatment of various meta- bolic bone diseases is enhanced by accurate measurement of total.
((Practical(Considerationsin(Activation(Analysis(To!better!understand!the!practical!details!of!how!activation!analysis!may!be. applied!to!a!given!problemin File Size: 4MB. What is Neutron Activation Analysis. Neutron activation analysis is currently the most sensitive and reliable method of measuring quantities of elements within compounds.
74 elements are susceptible to NAA, which can detect quantities in the range of parts per. Overview Neutron activation analysis is a sensitive multi-element analytical technique used for both qualitative and quantitative analysis of major, minor, trace and rare elements.
NAA was discovered in by Hevesy and Levi, who found that samples containing certain rare earth elements became highly radioactive after exposure to a source of.
This agrees with the findings from several previous studies of adolescents with EDs, which estimated total body nitrogen by in-vivo neutron activation analysis.
2, 20, 29 In-vivo neutron Cited by: 7.Measurement of total-body calcium, sodium, chlorine, nitrogen, and phosphorus in man by in vivo neutron activation analysis. Cohn SH, Dombrowski by: