Pub Date : 2013-11-28DOI: 10.1051/matecconf/20130704001
Jean Géringer, Digby D. Macdonald, Mathew L. Taylor
Les implants orthopediques de hanche ont une duree de vie d'environ 15 ans. Par exemple, la tige femorale d'un tel implant peut etre realisee en acier inoxydable 316L ou 316LN. Le fretting corrosion, frottement sous petits deplacements, peut se produire pendant la marche humaine en raison des chargements repetes entre le metal de la prothese et l'os. Plusieurs investigations experimentales du fretting corrosion ont ete entreprises. Cette couche passive de quelques nanometres, a temperature ambiante, est le point clef sur lequel repose le developpement de notre civilisation, selon certains auteurs. Ce travail vise a predire les epaisseurs de cette couche passive de l'acier inoxydable soumis au fretting corrosion, avec une attention specifique sur le role des proteines. Le modele utilise est base sur le Point Defect Model, PDM (a une echelle microscopique) et une amelioration de ce modele en prenant en compte le processus de frottement sous petits debattements. L'algorithme genetique a ete utilise pour optimiser la convergence du probleme. Les resultats les plus importants sont, comme demontre avec les essais experimentaux, que l'albumine, la proteine etudiee, empeche les degradations de l'acier inoxydable aux plus faibles concentrations d'ions chlorure ; ensuite, aux plus fortes concentrations de chlorures, un temps d'incubation est necessaire pour detruire le film passif.
{"title":"Prévision de l'épaisseur du film passif d'un acier inoxydable 316L soumis au fretting corrosion grâce au Point Defect Model, PDM","authors":"Jean Géringer, Digby D. Macdonald, Mathew L. Taylor","doi":"10.1051/matecconf/20130704001","DOIUrl":"https://doi.org/10.1051/matecconf/20130704001","url":null,"abstract":"Les implants orthopediques de hanche ont une duree de vie d'environ 15 ans. Par exemple, la tige femorale d'un tel implant peut etre realisee en acier inoxydable 316L ou 316LN. Le fretting corrosion, frottement sous petits deplacements, peut se produire pendant la marche humaine en raison des chargements repetes entre le metal de la prothese et l'os. Plusieurs investigations experimentales du fretting corrosion ont ete entreprises. Cette couche passive de quelques nanometres, a temperature ambiante, est le point clef sur lequel repose le developpement de notre civilisation, selon certains auteurs. Ce travail vise a predire les epaisseurs de cette couche passive de l'acier inoxydable soumis au fretting corrosion, avec une attention specifique sur le role des proteines. Le modele utilise est base sur le Point Defect Model, PDM (a une echelle microscopique) et une amelioration de ce modele en prenant en compte le processus de frottement sous petits debattements. L'algorithme genetique a ete utilise pour optimiser la convergence du probleme. Les resultats les plus importants sont, comme demontre avec les essais experimentaux, que l'albumine, la proteine etudiee, empeche les degradations de l'acier inoxydable aux plus faibles concentrations d'ions chlorure ; ensuite, aux plus fortes concentrations de chlorures, un temps d'incubation est necessaire pour detruire le film passif.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"11 1","pages":"04001"},"PeriodicalIF":0.0,"publicationDate":"2013-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89034445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-10-06DOI: 10.5506/APhysPolBSupp.6.1121
L. Raczynski, P. Kowalski, T. Bednarski, P. Bialas, E. Czerwiński, Ł. Kapłon, A. Kochanowski, G. Korcyl, J. Kowal, T. Kozik, W. Krzemień, Marcin Molenda, Paweł Moskal, S. Nied'zwiecki, Marek Palka, M. Pawlik, Z. Rudy, P. Salabura, Neha Gupta Sharma, M. Silarski, A. Slomski, J. Smyrski, A. Strzelecki, W. Wiślicki, M. Zielinski
Jagiellonian University, 30-059 Krakow, POLANDCompressive Sensing theory says that it is possible to reconstruct a mea-sured signal if an enough sparse representation of this signal exists in com-parison to the number of random measurements. This theory was appliedto reconstruct signals from measurements of plastic scintillators. Sparserepresentation of obtained signals was found using SVD transform.PACS numbers: 87.57.uk, 87.85.Ng, 89.20.Ff
{"title":"Application of Compressive Sensing Theory for the Reconstruction of Signals in Plastic Scintillators","authors":"L. Raczynski, P. Kowalski, T. Bednarski, P. Bialas, E. Czerwiński, Ł. Kapłon, A. Kochanowski, G. Korcyl, J. Kowal, T. Kozik, W. Krzemień, Marcin Molenda, Paweł Moskal, S. Nied'zwiecki, Marek Palka, M. Pawlik, Z. Rudy, P. Salabura, Neha Gupta Sharma, M. Silarski, A. Slomski, J. Smyrski, A. Strzelecki, W. Wiślicki, M. Zielinski","doi":"10.5506/APhysPolBSupp.6.1121","DOIUrl":"https://doi.org/10.5506/APhysPolBSupp.6.1121","url":null,"abstract":"Jagiellonian University, 30-059 Krak\u0013ow, POLANDCompressive Sensing theory says that it is possible to reconstruct a mea-sured signal if an enough sparse representation of this signal exists in com-parison to the number of random measurements. This theory was appliedto reconstruct signals from measurements of plastic scintillators. Sparserepresentation of obtained signals was found using SVD transform.PACS numbers: 87.57.uk, 87.85.Ng, 89.20.Ff","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"2946 1","pages":"1121"},"PeriodicalIF":0.0,"publicationDate":"2013-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86528196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-10-06DOI: 10.5506/APhysPolBSupp.6.1027
P. Bialas, J. Kowal, A. Strzelecki, T. Bednarski, E. Czerwi'nski, L. Kaplon, A. Kochanowski, G. Korcyl, P. Kowalski, T. Kozik, W. Krzemie'n, M. Molenda, P. Moskal, S. Nied'zwiecki, M. Palka, M. Pawlik, L. Raczy'nski, Z. Rudy, P. Salabura, N. Sharma, M. Silarski, A. Slomski, J. Smyrski, W. Wi'slicki, M. Zieli'nski
Reconstruction of the image in Positron Emission Tomographs (PET) requires the knowledge of the system response kernel which describes the contribution of each pixel (voxel) to each tube of response (TOR). This is especially important in list-mode reconstruction systems, where an efficient analytical approximation of such function is required. In this contribution, we present a derivation of the system response kernel for a novel 2D strip PET.
{"title":"System Response Kernel Calculation for List-mode Reconstruction in Strip PET Detector","authors":"P. Bialas, J. Kowal, A. Strzelecki, T. Bednarski, E. Czerwi'nski, L. Kaplon, A. Kochanowski, G. Korcyl, P. Kowalski, T. Kozik, W. Krzemie'n, M. Molenda, P. Moskal, S. Nied'zwiecki, M. Palka, M. Pawlik, L. Raczy'nski, Z. Rudy, P. Salabura, N. Sharma, M. Silarski, A. Slomski, J. Smyrski, W. Wi'slicki, M. Zieli'nski","doi":"10.5506/APhysPolBSupp.6.1027","DOIUrl":"https://doi.org/10.5506/APhysPolBSupp.6.1027","url":null,"abstract":"Reconstruction of the image in Positron Emission Tomographs (PET) requires the knowledge of the system response kernel which describes the contribution of each pixel (voxel) to each tube of response (TOR). This is especially important in list-mode reconstruction systems, where an efficient analytical approximation of such function is required. In this contribution, we present a derivation of the system response kernel for a novel 2D strip PET.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"53 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90922322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-16DOI: 10.5506/APhysPolBSupp.6.1061
M. Silarski
Since the discovery in 1932, neutrons became a basis of many methods used not only in research, but also in industry and engineering. Among others, the exceptional role in the modern nuclear engineering is played by the neutron activation spectroscopy, based on the interaction of neutron flux with atomic nuclei. In this article we shortly describe application of this method in medicine and detection of hazardous substances.
{"title":"APPLICATIONS OF NEUTRON ACTIVATION SPECTROSCOPY","authors":"M. Silarski","doi":"10.5506/APhysPolBSupp.6.1061","DOIUrl":"https://doi.org/10.5506/APhysPolBSupp.6.1061","url":null,"abstract":"Since the discovery in 1932, neutrons became a basis of many methods used not only in research, but also in industry and engineering. Among others, the exceptional role in the modern nuclear engineering is played by the neutron activation spectroscopy, based on the interaction of neutron flux with atomic nuclei. In this article we shortly describe application of this method in medicine and detection of hazardous substances.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"254 1","pages":"1061"},"PeriodicalIF":0.0,"publicationDate":"2013-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76791036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Ushie, V. Nwankwo, Ayinmode Bolaji, O. D. Osahun
We present the result of a preliminary assessment of radio-frequency radiation exposure from selected mobile base stations in Ajaokuta environs. The Power density of RF radiation within a radial distance of 125m was measured. Although values fluctuated due to the influence of other factors, including wave interference from other electromagnetic sources around reference base stations, we show from analysis that radiation exposure level is below the standard limit (4.5W/sqm for 900MHz and 9W/sqm for 18000MHz) set by the International Commission on Non-ionizing Radiation Protection (ICNIRP) and other regulatory agencies.
{"title":"Measurement and Analysis of Radio-frequency Radiation Exposure Level from Different Mobile Base Transceiver Stations in Ajaokuta and Environs, Nigeria","authors":"P. Ushie, V. Nwankwo, Ayinmode Bolaji, O. D. Osahun","doi":"10.9790/4961-0361721","DOIUrl":"https://doi.org/10.9790/4961-0361721","url":null,"abstract":"We present the result of a preliminary assessment of radio-frequency radiation exposure from selected mobile base stations in Ajaokuta environs. The Power density of RF radiation within a radial distance of 125m was measured. Although values fluctuated due to the influence of other factors, including wave interference from other electromagnetic sources around reference base stations, we show from analysis that radiation exposure level is below the standard limit (4.5W/sqm for 900MHz and 9W/sqm for 18000MHz) set by the International Commission on Non-ionizing Radiation Protection (ICNIRP) and other regulatory agencies.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84288494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Steven Gaylord, R. Blair, M. Courtney, A. Courtney
Abstract : Though three distinct wounding mechanisms (permanent cavity, temporary cavity, and ballistic pressure wave) are described in the wound ballistics literature; they all have their physical origin in the retarding force between bullet and tissue as the bullet penetrates. If the bullet path is the same, larger retarding forces produce larger wounding effects and a greater probability of rapid incapacitation. By Newton's third law, the force of the bullet on the tissue is equal in magnitude and opposite in direction to the force of the tissue on the bullet. For bullets penetrating with constant mass, the retarding force on the bullet can be determined using frame by frame analysis of high speed video of the bullet penetrating a suitable tissue simulant such as calibrated 10% ballistic gelatin. Here the technique is demonstrated with 9mm NATO bullets, 32 cm long blocks of gelatin, and a high speed video camera operating at 20,000 frames per second. It is found that different 9mm NATO bullets have a wide variety of potential for wounding and rapid incapacitation. This technique also determines the energy transfer in the first 15 cm and/or first 30 cm of tissue, which are important parameters in estimating the probability of rapid incapacitation in some of the ARL/BRL models. This method predicts that some 9mm bullets have a much higher probability of rapid incapacitation than others and the rank ordering of bullet effectiveness is in agreement with other studies.
{"title":"Bullet Retarding Forces in Ballistic Gelatin by Analysis of High Speed Video","authors":"Steven Gaylord, R. Blair, M. Courtney, A. Courtney","doi":"10.21236/ADA576989","DOIUrl":"https://doi.org/10.21236/ADA576989","url":null,"abstract":"Abstract : Though three distinct wounding mechanisms (permanent cavity, temporary cavity, and ballistic pressure wave) are described in the wound ballistics literature; they all have their physical origin in the retarding force between bullet and tissue as the bullet penetrates. If the bullet path is the same, larger retarding forces produce larger wounding effects and a greater probability of rapid incapacitation. By Newton's third law, the force of the bullet on the tissue is equal in magnitude and opposite in direction to the force of the tissue on the bullet. For bullets penetrating with constant mass, the retarding force on the bullet can be determined using frame by frame analysis of high speed video of the bullet penetrating a suitable tissue simulant such as calibrated 10% ballistic gelatin. Here the technique is demonstrated with 9mm NATO bullets, 32 cm long blocks of gelatin, and a high speed video camera operating at 20,000 frames per second. It is found that different 9mm NATO bullets have a wide variety of potential for wounding and rapid incapacitation. This technique also determines the energy transfer in the first 15 cm and/or first 30 cm of tissue, which are important parameters in estimating the probability of rapid incapacitation in some of the ARL/BRL models. This method predicts that some 9mm bullets have a much higher probability of rapid incapacitation than others and the rank ordering of bullet effectiveness is in agreement with other studies.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83274584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Gersten, Jacqueline Perle, D. Heimer, A. Raz, R. Fried
The technique of near infrared spectroscopy (NIRS) allows to measure the oxygenation of the brain tissue. The particular problems involved in detecting regional brain oxygenation (rSO2) are discussed. The dominant chromophore (light absorber) in tissue is water. Only in the NIR light region of 650-1000 nm, the overall absorption is sufficiently low, and the NIR light can be detected across a thick layer of tissues, among them the skin, the scull and the brain. In this region, there are many absorbing light chromophores, but only three are important as far as the oxygenation is concerned. They are the hemoglobin (HbO2), the deoxy-hemoglobin (Hb) and cytochrome oxidase (CtOx). The devices that were used in our experiments were : Somanetics INVOS Brain Oximeter (IBO) and Toomim's HEG spectrophotometer. The performances of both devices were compared including their merits and drawbacks. The IBO use for research has two drawbacks: the sampling rate is too small and the readings are limited to only two significant digits. The HEG device does not have these drawbacks, but is not developed sufficiently at this time to measure rSO2. We have measured the HEG readings and compared them with the rSO2 readings of the IBO. Results of an experiment are presented whose aim is to explore the relationship between respiration and cerebral oxygenation. Measurements of end tidal CO2 (EtCO2) were taken simultaneously with cerebral oxygen saturation (rSO2) using the INVOS Cerebral Oximeter of Somanetics. Due to the device limitations we could explore only subjects who could perform with a breathing rate of around 2/min or less. The results of all subjects clearly show a periodic change of cerebral oxygenation with the same period as the breathing exercises.
{"title":"Probing Brain Oxygenation Wave-forms with Near Infrared Spectroscopy (NIRS)","authors":"A. Gersten, Jacqueline Perle, D. Heimer, A. Raz, R. Fried","doi":"10.5772/39025","DOIUrl":"https://doi.org/10.5772/39025","url":null,"abstract":"The technique of near infrared spectroscopy (NIRS) allows to measure the oxygenation of the brain tissue. The particular problems involved in detecting regional brain oxygenation (rSO2) are discussed. The dominant chromophore (light absorber) in tissue is water. Only in the NIR light region of 650-1000 nm, the overall absorption is sufficiently low, and the NIR light can be detected across a thick layer of tissues, among them the skin, the scull and the brain. In this region, there are many absorbing light chromophores, but only three are important as far as the oxygenation is concerned. They are the hemoglobin (HbO2), the deoxy-hemoglobin (Hb) and cytochrome oxidase (CtOx). The devices that were used in our experiments were : Somanetics INVOS Brain Oximeter (IBO) and Toomim's HEG spectrophotometer. The performances of both devices were compared including their merits and drawbacks. The IBO use for research has two drawbacks: the sampling rate is too small and the readings are limited to only two significant digits. The HEG device does not have these drawbacks, but is not developed sufficiently at this time to measure rSO2. We have measured the HEG readings and compared them with the rSO2 readings of the IBO. Results of an experiment are presented whose aim is to explore the relationship between respiration and cerebral oxygenation. Measurements of end tidal CO2 (EtCO2) were taken simultaneously with cerebral oxygen saturation (rSO2) using the INVOS Cerebral Oximeter of Somanetics. Due to the device limitations we could explore only subjects who could perform with a breathing rate of around 2/min or less. The results of all subjects clearly show a periodic change of cerebral oxygenation with the same period as the breathing exercises.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81070916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A preliminary iterative three-dimensional meso-scale structural model of the femur was developed, in which bar and shell elements were used to represent trabecular and cortical bone respectively. The cross-sectional areas of the bar elements and the thickness values of the shell elements were adjusted over successive iterations of the model based on a target strain stimulus, resulting in an optimised construct. The predicted trabecular architecture, and cortical thickness distribution showed good agreement with clinical observations, based on the application of a single leg stance load case during gait. The benefit of using a meso-scale structural approach in comparison to micro- or macro-scale continuum approaches to predictive bone modelling was achievement of the symbiotic goals of computational efficiency and structural description of the femur.
{"title":"Structural optimisation: biomechanics of the femur","authors":"A. Phillips","doi":"10.1680/eacm.10.00032","DOIUrl":"https://doi.org/10.1680/eacm.10.00032","url":null,"abstract":"A preliminary iterative three-dimensional meso-scale structural model of the femur was developed, in which bar and shell elements were used to represent trabecular and cortical bone respectively. The cross-sectional areas of the bar elements and the thickness values of the shell elements were adjusted over successive iterations of the model based on a target strain stimulus, resulting in an optimised construct. The predicted trabecular architecture, and cortical thickness distribution showed good agreement with clinical observations, based on the application of a single leg stance load case during gait. The benefit of using a meso-scale structural approach in comparison to micro- or macro-scale continuum approaches to predictive bone modelling was achievement of the symbiotic goals of computational efficiency and structural description of the femur.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"29 1","pages":"147-154"},"PeriodicalIF":0.0,"publicationDate":"2011-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90680617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-12DOI: 10.5923/J.JNPP.20120204.01
W. Ulmer
The conventional treatment of the Bethe-Bloch equation for protons accounts for electron capture at the end of the projectile track by the small Barkas correction. This is only a possible way for protons, whereas for light and heavier charged nuclei the exchange of energy and charge along the track has to be accounted for by regarding the projectile charge q as a function of the residual energy. This leads to a significant modification of the Bethe-Bloch equation, otherwise the range in a medium is incorrectly determined. The LET in the Bragg peak domain and distal end is significantly influenced by the electron capture. A rather significant result is that in the domain of the Bragg peak the superiority of carbon ions is reduced compared to protons.
{"title":"The role of electron capture and energy exchange of positively charged particles passing through matter","authors":"W. Ulmer","doi":"10.5923/J.JNPP.20120204.01","DOIUrl":"https://doi.org/10.5923/J.JNPP.20120204.01","url":null,"abstract":"The conventional treatment of the Bethe-Bloch equation for protons accounts for electron capture at the end of the projectile track by the small Barkas correction. This is only a possible way for protons, whereas for light and heavier charged nuclei the exchange of energy and charge along the track has to be accounted for by regarding the projectile charge q as a function of the residual energy. This leads to a significant modification of the Bethe-Bloch equation, otherwise the range in a medium is incorrectly determined. The LET in the Bragg peak domain and distal end is significantly influenced by the electron capture. A rather significant result is that in the domain of the Bragg peak the superiority of carbon ions is reduced compared to protons.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79141341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
One of the most important characterizations of social health is existence the availability of safe drinking water. Since one of the sources of water contamination is nuclear contamination from radon gas, so in this research radon 222 concentration levels in water supplies in the Toyserkan (a region located in the west of Iran) is investigated. For measuring radon gas in water wells and springs Lucas chamber method is used. Review the results of these measurements that taken from 15th place show that, only five sites have radon concentrations above the limit dose. To reduce radon concentration, it is better to keep water in open pools in contact with air before the water is delivered to users.
{"title":"Study on radon and radium concentrations in drinking water in west region of Iran","authors":"G. Forozani, Ghasem. Soori","doi":"10.3923/AJ.2011.310.312","DOIUrl":"https://doi.org/10.3923/AJ.2011.310.312","url":null,"abstract":"One of the most important characterizations of social health is existence the availability of safe drinking water. Since one of the sources of water contamination is nuclear contamination from radon gas, so in this research radon 222 concentration levels in water supplies in the Toyserkan (a region located in the west of Iran) is investigated. For measuring radon gas in water wells and springs Lucas chamber method is used. Review the results of these measurements that taken from 15th place show that, only five sites have radon concentrations above the limit dose. To reduce radon concentration, it is better to keep water in open pools in contact with air before the water is delivered to users.","PeriodicalId":8462,"journal":{"name":"arXiv: Medical Physics","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86975633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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