Abstract:
:Computational models of human anatomy are mathematical representations of human anatomy designed to be used in dosimetry calculations. They have been used in dosimetry calculations for radiography, radiotherapy, nuclear medicine, radiation protection and to investigate the effects of low frequency electromagnetic fields. Tomographic medical imaging techniques have allowed the construction of digital three-dimensional computational models based on the actual anatomy of individual humans. These are called voxel models, tomographic models or phantoms. Their usefulness lies in their faithful representation of human anatomy and the flexibility they afford by being able to be scaled in size to match the required human dimensions. Segmenting medical images in order to make voxel models is very time-consuming so semi-automatic segmentation techniques are being developed. Some 21 whole or partial body models currently exist and more are being prepared. These models are listed and discussed.
journal_name
Radiat Environ Biophysjournal_title
Radiation and environmental biophysicsauthors
Caon Mdoi
10.1007/s00411-003-0221-8keywords:
subject
Has Abstractpub_date
2004-02-01 00:00:00pages
229-35issue
4eissn
0301-634Xissn
1432-2099journal_volume
42pub_type
杂志文章,评审abstract::In order to provide fundamental data required for dose evaluation due to environmental exposures, effective dose conversion coefficients, that is, the effective dose rate per unit activity per unit area, were calculated for a number of potentially important radionuclides, assuming an exponential distribution in ground...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-012-0432-y
更新日期:2012-11-01 00:00:00
abstract::For the estimation of radiation doses to organisms, concentration ratios (C ( R )s) of radionuclides are required. In the present study, C(R)s of various elements were obtained as analogues of radionuclides for algae, molluscs, and crustaceans, in eight estuarine areas around Japan. The elements measured were Na, Mg, ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-010-0317-x
更新日期:2010-11-01 00:00:00
abstract::The study reported in the present paper aimed to evaluate the effective energy (Eeff) of X-rays emitted from the surface of a bare X-ray probe and from different spherical applicators with various diameters, which are widely employed for low kV intraoperative radiotherapy (IORT) of breast cancer. A previously validate...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-020-00887-2
更新日期:2021-01-03 00:00:00
abstract::In the mountainous "Hohe Tauern" region of Salzburg (Austria), milk samples have been collected in a long-term montitoring programme since 1988, at eight alpine sites used for extensive, seasonal stock farming. For this alpine environment with its acidic soils developed on silicate bedrock, high soil-to-plant transfer...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-008-0192-x
更新日期:2009-02-01 00:00:00
abstract::Microwave irradiation has been shown to decrease the input resistance of snail neurons. In this study, we examined the role of extracellular calcium in triggering the microwave-induced enhancement of membrane conductance. Two sets of experiments were conducted. In the first set, nerve cells were superfused using Ringe...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01229821
更新日期:1985-01-01 00:00:00
abstract::The rate constants for the photodynamic inactivation of hen egg-white lysozyme at different temperatures were studied. Arrhenius plots of the methylene blue sensitized photo-inactivation of lysozyme gave an experimental activation energy of 7.5 kcal/mol. The rate constants for the photodynamic inactivation of lysozyme...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01326898
更新日期:1979-02-23 00:00:00
abstract::The risk of cancer after diagnostic X-rays received as fetus or during early childhood has been investigated in many studies. The results of recent epidemiological studies are summarized in a present systematic review. The strategies for literature search, inclusion criteria, and items for study quality assessment wer...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章,评审
doi:10.1007/s00411-008-0171-2
更新日期:2008-07-01 00:00:00
abstract::Those working in interventional cardiology are exposed to varying radiation doses during diagnostic and interventional procedures. The work presented in this paper aimed to monitor the effective doses received by different categories of medical staff members practicing interventional cardiology procedures including se...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-020-00862-x
更新日期:2020-11-01 00:00:00
abstract::With a model system of pBR322 plasmid DNA solution in vitro, the dose effects of radiation-induced single- and double-strand breaks (SSB and DSB) were measured and DSB was distinguished into alpha- and beta-types. Under the condition of low scavenging capacity existing in the irradiated DNA solution, SSB and alpha DSB...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s004110000054
更新日期:2000-06-01 00:00:00
abstract::About a century ago, Conrad Röentgen discovered X-rays, and Henri Becquerel discovered a new phenomenon, which Marie and Pierre Curie later coined as radio-activity. Since their seminal work, we have learned much about the physical properties of radiation and its effects on living matter. Alas, the more we discover, t...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章,评审
doi:10.1007/s00411-007-0146-8
更新日期:2008-02-01 00:00:00
abstract::More accurate reconstruction of the radioactive contamination of the Techa River system in 1949-1951 has been made on the basis of refined data on the amounts and the rate of discharge of radionuclides into the Techa River from the Mayak Production Association; this has led to the development of a modified Techa River...
journal_title:Radiation and environmental biophysics
pub_type: 历史文章,杂志文章
doi:10.1007/s00411-012-0414-0
更新日期:2012-11-01 00:00:00
abstract::This article describes the application of a simplified Bayesian method for estimation of doses from a mixed field using cytogenetic biological dosimetry, taking as an example neutron and gamma radiation emitted from the MARIA nuclear research reactor in Poland. The Bayesian approach is a good alternative to the common...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-018-0764-3
更新日期:2019-03-01 00:00:00
abstract::Non-linear mechanical response of viscoelastic strain responding media to high amplitude stress-strain is examined from a phenomenological point of view and found to lead to results compatible with empirical observations of high intensity ultrasound irradiation of brain, liver, and eye lens tissues. The proposed hyste...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01324230
更新日期:1981-01-01 00:00:00
abstract::The major part of the liquid radioactive waste released by the Mayak Production Association (PA) radiochemical plant into the Techa river occurred in 1949-1951, but there is information on only one single radiochemical analysis of a water sample taken on 24 and 25 September 1951. These data are here used to assess the...
journal_title:Radiation and environmental biophysics
pub_type: 历史文章,杂志文章,评审
doi:10.1007/s00411-003-0182-y
更新日期:2003-04-01 00:00:00
abstract::The heads of rats were irradiated by 4 MeV electrons in doses 90, 180, and 360 Gy. The observed times of deaths ranged 120-600, 60-420, and 150-370 min after 90, 180, and 360 Gy, respectively. A dose dependent decrease of the brain uptake index of haloperidol was observed 1 and 3 h post radiation. On the other hand an...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01210512
更新日期:1991-01-01 00:00:00
abstract::The observable responses of living systems to ionizing radiation depend on the level of biological organization studied. Understanding the relationships between the responses characteristic of the different levels of organization is of crucial importance. The main objective of the present study is to investigate how s...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-011-0382-9
更新日期:2011-11-01 00:00:00
abstract::The aim of this work was to define the possible occurrence of hematological changes during the course of a chronic ingestion of (137)Cs. A mouse model was used, with ingestion through drinking water with a cesium concentration of 20 kBq l(-1). Ingestion started in parent animals before mating, and (137)Cs intake and i...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-010-0267-3
更新日期:2010-05-01 00:00:00
abstract::The model of radiocaesium transfer to sheep presented by Galer et al. provides reliable predictions only for sheep of a similar body weight to those used in the development of the model (approximately 30 kg). To extend the applicability of the model, it was necessary to re-parameterise it in terms of activity concentr...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01211238
更新日期:1996-02-01 00:00:00
abstract::Within the Theory of Dual Radiation Action, the heuristically useful function, gamma(chi), that two energy depositions, a distance chi apart, will result in observable damage can be written in terms of two more fundamental quantities: One, s(chi), describes the structure of the sensitive matrix of the cell. The other,...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01210836
更新日期:1988-01-01 00:00:00
abstract::For studies on cell membranes, mice were exposed to mixed neutron + gamma reactor-radiation in the range of total doses from 0.5 to 4.5 Gy. Changes in functional activity of plasma membranes of erythrocytes, platelets, and lymphocytes were followed by a lectin-binding technique at various intervals afterwards. The amo...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01407598
更新日期:1984-01-01 00:00:00
abstract::It is shown by UV absorption and absolute fluorescence spectroscopy of solutions containing both DNA and quinacrine that the components experience mutual radio-protection due to scavenging of water radicals. From measurements at different ionic strengths it is inferred that quinacrine bound to DNA is more efficiently ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF02339804
更新日期:1975-06-13 00:00:00
abstract::An LBO (Li2B4O7) walled ionization chamber was designed to monitor the epithermal neutron fluence in boron neutron capture therapy clinical irradiation. The thermal and epithermal neutron sensitivities of the device were evaluated using accelerator neutrons from the 9Be(d, n) reaction at a deuteron energy of 4 MeV (4 ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-017-0700-y
更新日期:2017-08-01 00:00:00
abstract::The root apex cells of Pisum sativum were irradiated in an U-240 isochronous cyclotron at the Institute for Nuclear Research of the Ukrainian National Academy of Sciences, Kyiv. Several types of micronuclei, differing in structural peculiarities, were observed in the 84 h following exposure to beams of accelerated 1H,...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01275215
更新日期:1995-06-01 00:00:00
abstract::Data on rats exposed to cigarette smoke before or after exposure to radon are used to estimate smoke-dependent parameters of the biologically based two-stage clonal expansion model. The baseline parameters and the action of radon acting on initiation and promotion were fixed based on earlier work. Cigarette smoke acti...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-005-0006-3
更新日期:2005-10-01 00:00:00
abstract::During anthropogenic activities, such as agricultural soil management and traffic on unpaved roads, size distribution measurements were performed of atmospheric particulate radionuclides at a site in the Chernobyl 30-km exclusion zone. Analysis of cascade impactor measurements showed an increase of the total atmospher...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s004110050118
更新日期:1998-10-01 00:00:00
abstract::A temporary increase in the incidence of infant leukaemia in Greece was reported by Petridou et al., which was attributed to in utero exposure to ionising radiation resulting from the Chernobyl accident. We performed a similar analysis based on the data of the German Childhood Cancer Registry in order to check whether...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s004110050099
更新日期:1998-07-01 00:00:00
abstract::Our recent results suggest that 50 Hz magnetic fields (MF) enhance ultraviolet (UV)-induced tumorigenesis in mouse skin. The aim of the present experiment was to study suppression of apoptosis as a possible mechanism for MF effects on skin tumorigenesis. Another aim was to test the importance of a UV and MF exposure s...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-002-0153-8
更新日期:2002-06-01 00:00:00
abstract::To explore the expression level and the role of peroxisome proliferator-activated receptor gamma (PPAR-γ) in radiation-induced heart injury in a rat model, thirty-two Sprague-Dawley rats were divided into three groups (the control group, the 15-Gy irradiation group and the 18-Gy irradiation group). Experimental animal...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/s00411-011-0390-9
更新日期:2012-03-01 00:00:00
abstract::The rare earth radionuclides 177 Lu and 153Sm were administered as single i.p. injections in NMRI mice. Lu was deposited principally (up to 60%) in the skeleton if the quantity of stable carrier was low. Increase of stable carrier enhanced deposition in the reticulo-endothelial system. Sm was preferentially deposited ...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01324368
更新日期:1980-01-01 00:00:00
abstract::Four different thiol reagents: p-chloromercuribenzoic acid (pCMB), mercuric chloride (HgCl2), N-ethylmaleimide (NEM), and 5,5'-dithiobis-(2-nitrobenzoic acid) (DTNB) were employed as agents modifying the transport of a hydrophilic and hydrophobic non-electrolyte spin labels: 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-o...
journal_title:Radiation and environmental biophysics
pub_type: 杂志文章
doi:10.1007/BF01323760
更新日期:1983-01-01 00:00:00