10 Matching Results

Search Results

Advanced search parameters have been applied.

in creator/contributor: "Anderson, A.L."

open access

Estimating Adipose Tissue in the Chest Wall Using Ultrasonic and Alternate /sup 40/K and Biometric Measurements

The percentage of adipose (fat) tissue in the chest wall must be known to accurately measure Pu in the human lung. Correction factors of 100% or more in x-ray detection efficiency are common. Methods using simple /sup 40/K and biometric measurement techniques were investigated to determine the adipose content in the human chest wall. These methods predict adipose content to within 15% of the absolute ultrasonic value. These new methods are discussed and compared with conventional ultrasonic mea… more

Date: January 22, 1982

Creator: Anderson, A. L. & Campbell, G. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

New Developments in Ultrasonic Imaging of the Chest and Other Body Organs

The ultrasonic imaging system described herein was developed to measure chest-wall thickness and the percentage of fat in the chest and around other body organs. The system uses pulse-echo techniques to transmit and detect sound waves reflected from the interfaces of body organs and adjacent tissue. A computer draws these interfaces on color scans, and a code is used to exponentially average data from several points on each scan to find the average thicknesses of the chest wall and fat layers. … more

Date: April 27, 1978

Creator: Campbell, G. W. & Anderson, A. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Dual Energy Analysis Using Phoswich Scintillation Detectors for Low-Level in-Vivo Counting

From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). Electronics developed for a whole body counting system analyze the pulse heights of signals from both the sodium iodide (NaI(Tl)) and cesium iodide (CsI(Na)) crystals of a phoswich scintillation detector. Pulse shape discrimination is used to determine the origin of the scintillation, NaI or CsI, while rejecting coincident Compton-scattered events and photomultiplier tube noise. Both energy spectra are accumulated sim… more

Date: October 1, 1973

Creator: Shapiro, E. G. & Anderson, A. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

New Developments in Ultrasonic Imaging of the Chest and Other Body Organs. [Personnel Monitoring for Pu Deposited in Lungs]

The accurate measurement of transuranic elements deposited in the lung is a complex task. One of the problems is measuring uranium-L x-rays associated with plutonium passing through the chest of an accidentally exposed subject. Because the normal human chest-wall thickness varies from about 1 to 4.5 cm, it is important that an accurate determination be made for every person counted for plutonium or for other heavy elements with similar emissions. An ultrasonic B-scanning system (brightness modu… more

Date: November 11, 1977

Creator: Campbell, G. W. & Anderson, A. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

In Vivo Measurement of Actinides in the Human Lung. [Calibration and Comparison of Phoswich, Large-Area Proportional Counter, and Intrinsic Germanium Planar Array Detector Systems]

The problems associated with the in vivo detection and measurement of actinides in the human lung are discussed together with various measurement systems currently in use. In particular, the methods and calibration procedures employed at the Lawrence Livermore Laboratory, namely, the use of twin Phoswich detectors and a new, more realistic, tissue-equivalent phantom, are described. Methods for the measurement of chest-wall thickness, fat content, and normal human background counts are also disc… more

Date: November 6, 1979

Creator: Anderson, A. L.; Campbell, G. W. & Griffith, R. V.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Design Criteria for Phantoms for Calibration of External Detectors for the in-Vivo Assay of Plutonium

Problems associated with calibration and standardization of existing phantoms for measurement of plutonium isotopes in the lungs are discussed. The efforts of the ''Intercalibration Committee for Low-Energy Photon Measurements'' to design a standard phantom are described. Two approaches to the design are described and design details are given. (GHT)

Date: June 1, 1975

Creator: Dean, P. N.; Griffith, R. V. & Anderson, A. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fabrication of a Set of Realistic Torso Phantoms for Calibration of Transuranic Nuclide Lung Counting Facilities

A set of 16 tissue equivalent torso phantoms has been fabricated for use by major laboratories involved in counting transuranic nuclides in the lung. These phantoms, which have bone equivalent plastic rib cages, duplicate the performance of the DOE Realistic Phantom set. The new phantoms (and their successors) provide the user laboratories with a highly realistic calibration tool. Moreover, use of these phantoms will allow participating laboratories to intercompare calibration information, both… more

Date: October 26, 1983

Creator: Griffith, R. V.; Anderson, A. L.; Sundbeck, C. W. & Alderson, S. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fabrication of a Tissue-Equivalent Torso Phantom for Intercalibration of in-Vivo Transuranic-Nuclide Counting Facilities

A tissue-equivalent human-torso phantom has been constructed for calibration of the counting systems used for in-vivo measurement of transuranic nuclides. The phantom contains a human male rib cage, removable model organs, and includes tissue-equivalent chest plates that can be placed over the torso to simulate people with a wide range of statures. The organs included are lungs, heart, liver, kidneys, spleen, and tracheo-bronchial lymph nodes. Polyurethane with different concentrations of calci… more

Date: April 3, 1978

Creator: Griffith, R. V.; Dean, P. N.; Anderson, A. L. & Fisher, J. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Tissue-Equivalent Torso Phantom for Calibration of Transuranic-Nuclide Counting Facilities

Several tissue-equivalent human-torso phantoms have been constructed for the calibration of counting systems used for in-vivo measurement of transuranic radionuclides. The phantoms contain a simulated human rib cage (in some cases, real bone) and removable model organs, and they include tissue-equivalent chest plates that can be placed over the torso to simulate people with a wide range of statures. The organs included are the lungs, liver, and tracheobronchial lymph nodes. Polyurethane with va… more

Date: January 16, 1986

Creator: Griffith, R. V.; Anderson, A. L.; Dean, P. N.; Fisher, J. C. & Sundbeck, C. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Temperatures From Underground Detonation, Shot Rainier

The results of temaperature measuring experiments conducted for Rainier shot, Operation Plumbbob are described, The temperature distribution in the surrounding tuff resulting from the detonation of an underground nuclear device yielding 1.7 kilotons of energy has been measured, Data indicate peak temperatures in the vicinity or 90 deg existing in the central regions which drop rapidly to approach ambient temperatures at distances of about l80 feet from the original ground zero, Based on measure… more

Date: July 1, 1958

Creator: Goodale, T. C.; Ragent, B.; Samuel, A. H.; Anderson, A. L.; Nielsen, D. E. & Olsen, J. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department