scholarly journals Dosimetry of 131I for Occupational Radiation Workers by Whole Body Counting System

2014 ◽  
Vol 39 ◽  
pp. 21-27
Author(s):  
M.S. Rahman ◽  
M.A. Haydar ◽  
M.K.A. Patwary ◽  
S.M. Shome ◽  
S. Paul ◽  
...  
Keyword(s):  
Atomic Energy Commission ◽  
The Body ◽  
Whole Body ◽  
Body Counter ◽  
Body Activity ◽  
Whole Body Counter ◽  
Radiation Workers ◽  
Body Counting ◽  
Whole Body Counting ◽  
Occupational Radiation

Internal radiation dosimetry of occupational radiation workers due to inhalation of 131I during maintenance at iodine 131I hot cell of Radioisotope Production Division (RIPD) of Bangladesh Atomic Energy Commission have been performed with Whole Body Counter (WBC) containing two large size NaI detector. The contaminated radioactivity of the radiation workers by 131I was immediately conducted using a WBC (CANBERRA, FASTSCAN model 2250) and counting was repeated again a few days later. The performance of whole body counter was checked by CANBERRA transfer phantom (model 2257) with a mixed source (20 ml vial). The intake was calculated by Apex-Invivo counting software and then corresponding dose in thyroid were estimated by using Integrated Modules for Bioassay Analysis (IMBA) Professional Plus code modules. The body activity due to intake of 131I and the total effective and equivalent dose in thyroid were also estimated and discussed.

scholarly journals Brief Note: A Note Concerning the "100 Per Cent Value" in Iron Absorption Studies by Whole Body Counting

Blood ◽  
1964 ◽  
Vol 23 (6) ◽  
pp. 757-761 ◽  
Author(s):  
LEWIS M. SCHIFFER ◽  
D. C. PRICE ◽  
J. CUTTNER ◽  
S. H. COHN ◽  
EUGENE P. CRONKITE
Keyword(s):  
Iron Absorption ◽  
Whole Body ◽  
Body Counter ◽  
Whole Body Counter ◽  
Absorption Studies ◽  
Body Counting ◽  
Whole Body Counting ◽  
Body Count

Abstract The 4-hour whole body count is found to be clinically valid as a "100 per cent value" in iron absorption studies performed with a whole body counter. Measurement of iron absorption can be made 2 weeks after ingestion of radioiron, but not prior to this period.

Studies of Calcium Absorption in Man Using a CD-2 Whole-Body Counter

1977 ◽  
Vol 16 (04) ◽  
pp. 163-167
Author(s):  
K. Bakos ◽  
Věra Wernischová
Keyword(s):  
Calcium Absorption ◽  
Whole Body ◽  
Control Group ◽  
Absorption Process ◽  
Whole Body Counter ◽  
Absorption Studies ◽  
Body Counting ◽  
Calcium Load ◽  
Calcium Malabsorption ◽  
Whole Body Counting

SummaryWhole-body counting makes an important contribution of radioisotope techniques to ȁEin vivo“ absorption studies, in comparison with other methods. In a large number of subjects, the method was tested for its usefulness in the diagnosis of calcium malabsorption. The effects of drugs, of the calcium load in the gut and of the whole-body content of calcium on the absorption process were studied in a control group.

A Simple and Inexpensive Clinical Whole Body Counter

1976 ◽  
Vol 15 (05) ◽  
pp. 248-253
Author(s):  
A. K. Basu ◽  
S. K. Guha ◽  
B. N. Tandon ◽  
M. M. Gupta ◽  
M. ML. Rehani
Keyword(s):  
The Body ◽  
Whole Body ◽  
Vitro Assay ◽  
Body Counter ◽  
Optimum Parameters ◽  
Whole Body Counter ◽  
Single Detector ◽  
Background Index ◽  
Iodide Crystal

SummaryThe conventional radioisotope scanner has been used as a whole body counter. The background index of the system is 10.9 counts per minute per ml of sodium iodide crystal. The sensitivity and derived sensitivity parameters have been evaluated and found to be suitable for clinical studies. The optimum parameters for a single detector at two positions above the lying subject have been obtained. It has been found that for the case of 131I measurement it is possible to assay a source located at any point in the body with coefficient of variation less than 5%. To add to the versatility, a fixed geometry for in-vitro counting of large samples has been obtained. The retention values obtained by the whole body counter have been found to correlate with those obtained by in-vitro assay of urine and stool after intravenous administration of 51Cr-albumin.

scholarly journals Measurement of Absorption of Vitamin B12 by Whole-Body Gamma Spectrometry

Blood ◽  
1961 ◽  
Vol 18 (1) ◽  
pp. 95-101 ◽  
Author(s):  
P. G. REIZENSTEIN ◽  
EUGENE P. CRONKITE ◽  
S. H. COHN
Keyword(s):  
Vitamin B12 ◽  
Intrinsic Factor ◽  
The Body ◽  
Whole Body ◽  
Radiochemical Analysis ◽  
Body Counting ◽  
Simple Measurement ◽  
Primary Advantage ◽  
Whole Body Counting ◽  
High Degree

Abstract A technic is described to measure directly the intestinal absorption of radiovitamin B12 by using a whole-body gamma spectrometer. A double tracer technic is used, and the amounts of free and intrinsic factor bound vitamin B12, respectively, retained in the body after final excretion of unabsorbed radioactivity, are measured. The results are in agreement with those previously obtained by other methods. The present method is simple and quantitative. The primary advantage of the whole-body counter for measuring absorption of Cobalt-labeled B12 is that it can measure less than 0.1 µc. with a high degree of accuracy. Whole-body counting substitutes a rapid and simple measurement for the difficult and tedious collection and radiochemical analysis of excreta.

scholarly journals MCNP model of the EEAE ACCUSCAN Whole Body Counter

2019 ◽  
Vol 23 ◽  
pp. 171
Author(s):  
N. Sarlikiotis ◽  
C. Potiriadis ◽  
M. Nikolaki ◽  
I. E. Stamatelatos
Keyword(s):  
Atomic Energy Commission ◽  
Radiation Detection ◽  
Atomic Energy ◽  
Whole Body ◽  
Body Counter ◽  
Detection Systems ◽  
Whole Body Counter ◽  
Shadow Shield ◽  
Ge Detector

Monte Carlo simulations and verification measurements for the efficiency calibration of the ACCUSCAN shadow-shield type Whole Body Counter (WBC) of the Greek Atomic Energy Commission (EEAE) are presented. A model of the counter and RMC-II anthropomorphic phantom was developed using the MCNP code. Full energy peak efficiencies for different phantom positions were calculated for 60Co and 137Cs sources. The deviations between computational and experimental efficiencies were found to be less than 12 % for 60Co and 4 % for 137Cs for the Ge detector and less than 25 % for 60Co and 4 % for 137Cs for the NaI detector. This work contributes to the accurate quantification of internal contamination in individuals accidentally exposed in Greece by the Greek Atomic Energy Commission Laboratories and moreover demonstrates the effectiveness of using computational tools for understanding the calibration of radiation detection systems used for in vivo monitoring.

scholarly journals Chemical composition of organs of children who died from malnutrition

1969 ◽  
Vol 23 (4) ◽  
pp. 783-790 ◽  
Author(s):  
G. A. O. Alleyne ◽  
D. Halliday ◽  
J. C. Waterlow ◽  
B. L. Nichols
Keyword(s):  
Magnesium Content ◽  
The Body ◽  
Liver Fat ◽  
Whole Body ◽  
Total Body Potassium ◽  
Malnourished Children ◽  
Body Counting ◽  
Total Body ◽  
Whole Body Counting ◽  
The Brain

1. Chemical analysis was carried out on samples of brain, liver, skeletal muscle, heart and kidney obtained from children who died of malnutrition. Total body potassium was measured before autopsy by the ‘whole body counting’ technique.2. There was a marked increase in liver fat, and the brain contributed a higher percentage of the body-weight in the more severely malnourished children.3. All the organs had approximately the same concentrations of non-collagen nitrogen. The proportion of collagen was highest in muscle.4. All organs were depleted of potassium, but the muscle was most severely affected. Brain potassium as a percentage of total body potassium was higher than normal in the most severely potassium depleted children.5. Measurements of tissue magnesium showed that there was no difference in magnesium content of tissues when expressed in terms of non-collagen nitrogen. When compared with normal values, muscle was magnesium depleted. The potassium to magnesium ratio was lowest in muscle.

Automated analysis in whole body counting of radiation workers

1986 ◽  
Vol 59 (1-2) ◽  
pp. 11-14
Author(s):  
E. Havlik ◽  
H. Bergmann ◽  
R. Höfer
Keyword(s):  
Automated Analysis ◽  
Whole Body ◽  
Radiation Workers ◽  
Body Counting ◽  
Whole Body Counting

Whole-Body and Renal Clearance of 203Hg-Chlormerodrin. The Effect of Chelating Agents on Clearance

1970 ◽  
Vol 09 (03) ◽  
pp. 248-258 ◽  
Author(s):  
Marianne Lederer ◽  
Manuel Tubis ◽  
William Blahd ◽  
G. T. Krishnamurthy
Keyword(s):  
Renal Clearance ◽  
Chelating Agents ◽  
Chelating Agent ◽  
The Body ◽  
Whole Body ◽  
Time Intervals ◽  
Body Counter ◽  
Whole Body Counter ◽  
Renal Clearances ◽  
Renal Scanning

SummaryUsing a whole-body counter, normal whole-body and renal clearances of 203Hg-chlormerodrin and the action of L-cysteine and D-penicillamine as chelating agents have been studied in 19 subjects.L-cysteine and D-penicillamine given in varying doses at different time intervals did not change the whole-body or renal retention of mercury. This indicates that these chelating agents are not effective when mercury is present in the body in minute quantities. The search for better and more convenient renal scanning agents should continue, as should also the search for a better chelating agent to enhance clearance of 203Hg from the body.

scholarly journals Blood dosimetry from a single measurement of the whole body radioiodine retention in patients with differentiated thyroid carcinoma

2009 ◽  
Vol 16 (4) ◽  
pp. 1283-1289 ◽  
Author(s):  
Heribert Hänscheid ◽  
Michael Lassmann ◽  
Markus Luster ◽  
Richard T Kloos ◽  
Christoph Reiners
Keyword(s):  
Absorbed Dose ◽  
Differentiated Thyroid Carcinoma ◽  
Whole Body ◽  
Simple Method ◽  
Remnant Ablation ◽  
Body Retention ◽  
Body Activity ◽  
Body Counting ◽  
Simple Formalism ◽  
Whole Body Counting

A simple method is presented to estimate the radiation-absorbed dose to the blood after radioiodine administration from a single external measurement of the whole-body retention in patients suffering from differentiated thyroid cancer. The blood dose is calculated applying the formalism of the Medical International Radiation Dose Committee under the assumptions that whole-body activity decays exponentially and that 14% of the whole-body residence time can be attributed to the blood. Accuracy and applicability of the method were tested based on data from 29 assessments, 18 pre-therapeutic tracer studies, and 11 ablation therapies, with whole-body and blood-retention measurements over at least 4 days. The mean of the absolute deviations between estimates and actual blood doses was found to be 14%, if external whole-body counting was performed on day 1 or 2 after radioiodine administration. This simple formalism is: 1) applicable to pre-therapeutic dosimetry for remnant ablation or treatment of metastases in a blood dose-based treatment concept and 2) applicable to blood-dose estimates after radioiodine therapy to determine radiation exposure. When combined with a measurement of the whole body retention 1 or 2 days after radioiodine administration this single time-point method closely approximates the classic, yet much more labor intensive multi-day dosimetry that measures both blood and whole-body activities.

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