Automatic filter placement device for region of interest (ROI) fluoroscopy.

abstract：:Accidental exposure to depleted or enriched uranium may occur in a variety of circumstances. There is a need to quantify such exposure, with the possibility that the testing may post-date exposure by months or years. Therefore, it is important to develop a very sensitive test to measure precisely the isotopic composit...

journal_title：Health physics

authors： Parrish RR,Thirlwall MF,Pickford C,Horstwood M,Gerdes A,Anderson J,Coggon D

更新日期：2006-02-01 00:00:00

abstract：:Bioassay and laboratory survey schedules can be generated using a radioisotope inventory program. This paper discusses the use of laboratory activity, past performance and operational factors for laboratory survey frequency determination, and use of laboratory activity for bioassay scheduling. Mayo Clinic has recently...

journal_title：Health physics

authors： Classic KL,Gross GP

更新日期：1990-08-01 00:00:00

abstract：:A personal 222Rn and gamma-ray detector has been developed. The detector precision is limited only by the Poisson counting error and has a lower limit of detection in this study of 4.5 kBq m-3 h (4 pCi L-1 day). The detector was used in a study of 52 homes in Illinois to measure the personal exposure vs. the simultane...

journal_title：Health physics

authors： Harley NH,Chittaporn P,Roman MH,Sylvester J

更新日期：1991-12-01 00:00:00

abstract：:External gamma exposures from radionuclides deposited on surfaces usually result in the major contribution to the total dose to the public living in urban-industrial environments. The aim of the paper is to give an example for a calculation of the collective and averted collective dose due to the contamination and dec...

journal_title：Health physics

authors： Kis Z,Eged K,Voigt G,Meckbach R,Müller H

更新日期：2004-02-01 00:00:00

abstract：:Quantification of the biologically relevant dose is required for the establishment of cause-and-effect between radiation detriment or burden and important biological outcomes. Most epidemiological studies of unanticipated radiation exposure fail to establish cause and effect because of an inability to construct a vali...

journal_title：Health physics

authors： Pass B,Baranov AE,Kleshchenko ED,Aldrich JE,Scallion PL,Gale RP

更新日期：1997-03-01 00:00:00

abstract：:Thyroids from mule deer (Odocoileus hemionus) were collected in New Mexico, Colorado, Wyoming and Idaho and 129I/127I atom ratios were determined. Iodine-129/127 atom ratios were significantly (P less than 0.005) different among states. Ratios in Wyoming and Idaho control thyroids were significantly (P less than 0.05)...

journal_title：Health physics

authors： Markham OD,Hakonson TE,Whicker FW,Morton JS

更新日期：1983-07-01 00:00:00

abstract：:Available medical records of plutonium injectees exposed in experimental studies of plutonium biokinetics under Manhattan Engineer District auspices have been reviewed for subsequent medical findings potentially related to the plutonium exposures. Five subjects who had been injected with approximately 11 kBq 239Pu, an...

journal_title：Health physics

authors： Stebbings JH

更新日期：1999-05-01 00:00:00

abstract：:The distribution and behavior of Cs in the soil-plant systems at some upland sites in Northeastern Italy, Scotland, and Norway have been investigated. From the limited range of samples taken, there appears to be no dominant physicochemical control on the plant availability of Cs. The presence of micaceous minerals or ...

journal_title：Health physics

authors： Livens FR,Horrill AD,Singleton DL

更新日期：1991-04-01 00:00:00

abstract：:Samples of bone containing cellular and fatty bone marrow were removed at autopsy from the body of a woman who, following an automobile accident, had been injected with approximately 25 mL of the radiographic contrast medium Thorotrast. The woman survived for 36 y after the accident and died at age 72 y following bone...

journal_title：Health physics

authors： Priest ND,Humphreys JA,Kathren RL,Mays CW

更新日期：1992-07-01 00:00:00

abstract：:A critical review of the literature on the biokinetics of inhaled mercury vapor was performed as part of an accident analysis for the Spallation Neutron Source to be built at Oak Ridge National Laboratory. It was concluded that current models for inhaled mercury vapor do not accurately describe the distribution or res...

journal_title：Health physics

authors： Leggett RW,Munro NB,Eckerman KF

更新日期：2001-10-01 00:00:00

abstract：:The longterm behavior of 137Cs in milk of a Bavarian farm (farm A) deposited as a consequence of the Chernobyl accident has been followed from April 1986 until August 1994. On the basis of activity measurements in milk and feed, transfer coefficients for the different seasons have been estimated in order to see any ch...

journal_title：Health physics

authors： Voigt G,Rauch F,Paretzke HG

更新日期：1996-09-01 00:00:00

abstract：:The novel technique for measuring the water content in lungs based on the slowing down of fast neutrons has been improved making possible its clinical use on patients. This goal has been reached by performing computer simulations that closely mimic the experimental setup and by acquiring a new set of measurements obta...

journal_title：Health physics

authors： Campi F,Dionigi F

更新日期：2001-12-01 00:00:00

abstract：:Medical health physics is the profession dedicated to the protection of healthcare providers, members of the public, and patients from unwarranted radiation exposure. Medical health physicists must be knowledgeable in the principles of health physics and in the applications of radiation in medicine. Advances in medica...

journal_title：Health physics

authors： Vetter RJ

更新日期：2004-05-01 00:00:00

abstract：:In the summers of 1990 and 1991, outdoor 222Rn detectors were installed for 3 mo in 78 communities across Canada. The 1990 measurements showed large regional variations with the average outdoor levels for the provinces of Manitoba (59 Bq m-3) and Saskatchewan (61 Bq m-3) exceeding the average indoor levels of 55 Bq m-...

journal_title：Health physics

authors： Grasty RL

更新日期：1994-02-01 00:00:00

abstract：:For efficiently measuring ultraviolet transmission through clothing materials for a large number of samples, an automated measuring system with a broad-band method has been built and calibrated against a spectroradiometer based instrument. The apparatus can be used to test 60 samples in 25 min. A selection of clothing...

journal_title：Health physics

authors： Zhang Z,Thomas BW,Wong CF,Fleming RA

更新日期：1997-02-01 00:00:00

abstract：:Bovine thyroid glands from different countries in Europe and human thyroid glands from Lower Saxony (Federal Republic of Germany) show isotopic 129I/127I ratios of 2.1 X 10(-9) to 8.2 X 10(-8) for cattle and 2.1 X 10(-9) to 8 X 10(-8) in humans. These values give information about the concentration of fallout 129I in ...

journal_title：Health physics

authors： Handl J,Pfau A,Huth FW

更新日期：1990-05-01 00:00:00

abstract：:A review is given of the classical theory of cluster formation to see whether it is a useful description of the behaviour of unattached radioactive particles. Special attention is given to the predictions concerning the size of the clusters, their growth, and their dependency on humidity and other trace gases. The the...

journal_title：Health physics

authors： Raes F

更新日期：1985-12-01 00:00:00

abstract：:An unventilated 70 m underground space, with 2.1 m high ceilings and an inner set of concrete walls to damp vibrations, was discovered to have relatively stable radon levels of ~1,080 Bq m over a 1-y period. The addition of radium sources was not required to achieve high and somewhat variable radon levels, as these ar...

journal_title：Health physics

authors： Carmona MA,Kearfott KJ

更新日期：2019-06-01 00:00:00

abstract：:Radiostrontium isotopes (Sr, Sr, and Sr) are major fission by-products in nuclear reactors, in radiological events, and in environmental radioactive contamination. A method to analyze Sr and Sr in water has been developed using gradient elution with dilute hydrochloric acid and cation exchange resin, followed by carbo...

journal_title：Health physics

authors： Nguyen DM,Moody WA,Williamson JA

更新日期：2019-06-01 00:00:00

abstract：:Because of fast growing medical radiation use, estimating possible late health effects of radiation, including potential cancer risk, is an issue of substantial interest. Since physicians make the decision to order or perform a radiological procedure, it is very important to provide them with objective information abo...

journal_title：Health physics

authors： Ivanov VK,Tsyb AF,Mettler FA,Menyaylo AN,Kashcheev VV

更新日期：2012-12-01 00:00:00

abstract：:Measurements of the effective diffusion coefficient, De, of 222Rn in concrete are important for accurate determination of transport mechanisms and computer modeling of radon entry into structures. A method for in-situ determination of De as well as the emanation fraction, F, is described. It is based on continuous mea...

journal_title：Health physics

authors： Gadd MS,Borak TB

更新日期：1995-06-01 00:00:00

abstract：:Emergency responders from the Department of Energy are trained regularly to assess the environmental consequences of a radiological or nuclear incident. While drills and exercises are highly effective tools in rehearsing for an emergency, the accidents at the Fukushima Daiichi Nuclear Power Plants presented real-world...

journal_title：Health physics

authors： Musolino SV,Clark H,McCullough T,Pemberton W

更新日期：2012-05-01 00:00:00

abstract：:A new 241Am lung monitoring system without shielding was devised by using an imaging plate system. The Lawrence Livermore National Laboratory's realistic torso phantom containing a 241Am lung was covered by imaging plates sealed in lightproof bags. The imaging plate system displayed 241Am lung images characteristic of...

journal_title：Health physics

authors： Hirota M,Kurihara O,Takada C,Takasaki K,Momose T,Deji S,Ito S,Saze T,Nishizawa K

更新日期：2007-07-01 00:00:00

abstract：:The geometrical structure of the lung is one of the main factors governing inhaled particle deposition; structural differences among different species are, therefore, of great importance for extrapolation modeling. A statistical analysis of morphometric data for the human and rat tracheobronchial tree reveals signific...

journal_title：Health physics

authors： Hofmann W,Koblinger L,Martonen TB

更新日期：1989-01-01 00:00:00

abstract：:The calculation of radiation dose estimates to the fetus is often important in nuclear medicine. To obtain the best estimates of radiation dose to the fetus, the best biological and physical models should be employed. In this paper the most recent data available on the placental crossover of many radiopharmaceuticals ...

journal_title：Health physics

authors： Russell JR,Stabin MG,Sparks RB

更新日期：1997-11-01 00:00:00

abstract：:In recent years, regulatory emphasis on the prevention of loss, theft and intentional misuse of radioactive materials at academic institutions has forced radiation safety personnel to devote increasing amounts of time and effort to address security issues. NRC regulations require that radioactive materials used or sto...

journal_title：Health physics

authors： Farley DV,Normandin RD,Martz MD,Langhorst SM

更新日期：2003-11-01 00:00:00

abstract：:Reported here are results of a 1982 national survey in France to establish the collective effective dose equivalent associated with the main types of radiological examinations practiced annually in this country (except nuclear medicine, C.T. scans, dental radiology and mass chest screening). This report describes the ...

journal_title：Health physics

authors： Maccia C,Benedittini M,Lefaure C,Fagnani F

更新日期：1988-04-01 00:00:00

abstract：:An addition has been made to an existing software program for calculating shielding thicknesses of barriers for megavoltage radiation therapy beams. This addition calculates the shielding thicknesses required for the roof of a single-story building when adjacent, multi-level buildings are occupied. ...

journal_title：Health physics

authors： Biggs PJ

更新日期：1998-10-01 00:00:00

abstract：:Indoor 222Rn concentrations were measured in 37 houses with alpha track detectors placed in water-use rooms near water sources (bathrooms, laundry rooms, and kitchens) and in non-water-use living rooms, dining rooms, and bedrooms away from water sources. Results show that relative contributions of 222Rn to indoor air ...

journal_title：Health physics

authors： Folger PF,Nyberg P,Wanty RB,Poeter E

更新日期：1994-09-01 00:00:00

abstract：:Occupational exposure to ionizing radiation from medical practices in China has been collected for a 7 y period between 2010 and 2016 from roughly 220 individual monitoring service providers through the Chinese Registry of Radiation Workers. Statistical dose distributions and characteristic tendencies are presented ba...

journal_title：Health physics

authors： Deng J,Fan S,Wang T,Hao S,Liu X,Guo W,Sun Q

更新日期：2019-12-01 00:00:00