Calculation of the maximum allowed ambient dose rate outside CT rooms to quantitatively assess the structural shielding performance.

Abstract:

:The goal of this study was to develop a method to quantitatively assess the structural shielding performance of computed tomography (CT) rooms in Switzerland. The method was based on the comparison between calculated maximum allowed ambient dose rate (DR) and measured ambient DR in adjacent spaces. If the measured DR exceeds the calculated maximum allowed value, additional shielding is required; otherwise the shielding is sufficient. The maximum allowed ambient DR was calculated using two different shielding concepts either based on the tube loading of the scanner or on the accumulated dose length product of the scans. The method was validated for 36 spiral CT head protocols. The average ratio of the maximum allowed ambient DR between both concepts was 1.11 (range 0.57-2.14). Among 36 CT rooms, 7 room boundaries were insufficiently shielded. In conclusion, this method allows the authority to check on-site the compliance of the structural shielding with legal requirements.

journal_name

Radiat Prot Dosimetry

authors

Treier R,Landis R,Theiler T,Stritt N,Trueb PR,Baechler S

doi

10.1093/rpd/ncw131

subject

Has Abstract

pub_date

2017-04-25 00:00:00

pages

226-235

issue

2

eissn

0144-8420

issn

1742-3406

pii

ncw131

journal_volume

174

pub_type

杂志文章
  • Relative implications of protective responses versus damage induction at low dose and low-dose-rate exposures, using the microdose approach.

    abstract::In reviewing the tissue effects of low-dose radiation (1) absorbed dose to tissue is replaced by the sum of energy deposited with track events in cell-equivalent tissue micromasses, i.e. with microdose hits, in the number of exposed micromasses and (2) induced cell damage and adaptive protection are related to microdo...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/oxfordjournals.rpd.a006197

    authors: Feinendegen LE

    更新日期:2003-01-01 00:00:00

  • Neutron spectrometry in a PET cyclotron with a Bonner sphere system.

    abstract::Positron emission tomography (PET) is a non-invasive medical imaging technique normally used for diagnostic purposes to determine the location and concentration of physiologically active compounds in a human body. An unshielded cyclotron is used for PET at the Clinica Universitaria de Navarra to produce short-lived po...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncm077

    authors: Fernández F,Amgarou K,Domingo C,García MJ,Quincoces G,Martí-Climent JM,Méndez R,Barquero R

    更新日期:2007-01-01 00:00:00

  • Radioactivity and dose assessment of marble samples from Igbeti mines, Nigeria.

    abstract::The concentration and distribution of natural radionuclides in marble around Igbeti marble mines, Nigeria, were measured to evaluate the environmental radioactivity and health effects which the marble samples may posses. The concentration of radionuclides was determined using gamma-ray spectrometry with NaI (Tl) detec...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncn279

    authors: Ademola AK,Hammed OS,Adejumobi CA

    更新日期:2008-01-01 00:00:00

  • Current status of radiological protection at nuclear power stations in Japan.

    abstract::The radiation dose to workers at nuclear power stations (NPSs) in Japan was drastically reduced between the late-1970s and the early-1990s by continuous dose-reduction programmes. The total collective dose of radiation workers in FY 2008 was 84.04 person Sv, while the average collective dose was 1.5 person Sv per reac...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncr185

    authors: Suzuki A,Hori S

    更新日期:2011-07-01 00:00:00

  • Non-linearity of TL dose responses in MgSO4:Dy CO-doped with Mn, P and Cu.

    abstract::Thermoluminescence (TL) dose responses to gamma radiation in the dose range from 0.1 Gy to 20 kGy in MgSO4:Dy, MgSO4:Dy,Mn, MgSO4:Dy,P and MgSO4:Dy,P,Cu phosphors were obtained and fitted by the composite action dose response function to obtain non-linear characteristic parameters, one-hit factor R and characteristic ...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/oxfordjournals.rpd.a005824

    authors: Zhang CX,Luo DL

    更新日期:2002-01-01 00:00:00

  • Measurements of radon concentrations in waters and soil gas of Zonguldak, Turkey.

    abstract::The radon concentrations in soil-gas and water samples (in the form of springs, catchment, tap, thermal) used as drinking water or thermal were measured using a professional radon monitor AlphaGUARD PQ 2000PRO. The measured radon concentrations in water samples ranged from 0.32 to 88.22 Bq l(-1). Most of radon levels ...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/nct308

    authors: Koray A,Akkaya G,Kahraman A,Kaynak G

    更新日期:2014-12-01 00:00:00

  • PATIENT DOSE ASSESSMENT AFTER INTERVENTIONAL CARDIOLOGY PROCEDURES: A MULTI-CENTRIC APPROACH TO TRIGGER OPTIMISATION.

    abstract::As the number and complexity of fluoroscopically guided interventions increase, a serious effort has to be put on the optimisation of the X-ray dose delivered to the patient. In order to set up this optimisation process, the clinical practice for a given cardiology centre has to be analysed with relevant statistical p...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章,多中心研究

    doi:10.1093/rpd/ncv525

    authors: Ryckx N,Goy JJ,Stauffer JC,Verdun FR

    更新日期:2016-06-01 00:00:00

  • DOSE AREA PRODUCT VALUES OF FLUOROSCOPICALLY GUIDED PAIN MANAGEMENT PROCEDURES: COMPARISON OF A BELGIAN TEACHING HOSPITAL WITH NATIONAL DIAGNOSTIC REFERENCE LEVELS.

    abstract::In 2011, national diagnostic reference levels (DRLs) were proposed for pain management fluoroscopic procedures in Belgium. The primary goal of this work is to compare the dose area product values (DAP) recorded at the Saint-Luc University Hospital to these DRLs. From 2012 to 2015, 7664 interventional pain management p...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncx271

    authors: Hustinx N,Steyaert A,le Polain de Waroux B,Forget P

    更新日期:2018-05-01 00:00:00

  • Thermoluminescence properties of KCl(1-X)KBrX:Pb2+ mixed crystals.

    abstract::A study is presented of the thermoluminescence (TL) of phosphors based on potassium halides doped with divalent lead, such as KCl:Pb2+, KBr:Pb2+ and the crystalline series KCl(1-X)Br(X):Pb2+. The defects in the crystals generated by irradiation have been investigated as well as the trapping and room temperature recomb...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/oxfordjournals.rpd.a005913

    authors: Cruz-Zaragoza E,Meléndrez R,Chernov V,Barboza-Flores M,Piters TM,Hernández JA,Murrieta HS

    更新日期:2002-01-01 00:00:00

  • Dose surveys and DRLs: critical look and way forward.

    abstract::The main purpose of dose surveys has been to detect and bring down wide variation in radiation doses for any particular radiological examination and to avoid doses that are on higher side. Diagnostic reference levels (DRLs) have been used for over two decades as an aid in this objective. With very limited success that...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncv063

    authors: Rehani MM

    更新日期:2015-07-01 00:00:00

  • A survey on uncertainty in bioassay measurements carried out within the OMINEX project.

    abstract::One of the topics covered by the OMINEX (Optimisation of Monitoring for Internal Exposure) project was to look at the bioassay measurements performed in the European laboratories. Questionnaires on bioassay measurements by alpha spectrometry or inductively coupled plasma-mass spectrometry (ICP-MS) were sent to Europea...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/oxfordjournals.rpd.a006261

    authors: Hurtgen C,Cossonnet C

    更新日期:2003-01-01 00:00:00

  • 1800 MHz in vitro exposure device for experimental studies on the effects of mobile communication systems.

    abstract::A wire patch cell (WPC) operating at the uplink frequency band of GSM 1800 MHz has been designed for in vitro experiments with the aim of investigating the possible biological effects of electromagnetic radiation associated with cellular phones. The 1800 MHz WPC design is a direct descendant of the original 900 MHz WP...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/nch414

    authors: Ardoino L,Lopresto V,Mancini S,Pinto R,Lovisolo GA

    更新日期:2004-01-01 00:00:00

  • Natural radioactivity study in soil samples of South Konkan, Maharashtra, India.

    abstract::This study assesses the level of natural radioactivity due to radionuclides, ²³⁸U, ²³²Th and ⁴⁰K, in 50 soil samples collected from South Konkan, Maharashtra, India. The mean activity concentrations of ²³⁸U, ²³²Th and ⁴⁰K are 44.97 ± 1.22 Bq kg⁻¹, 59.70 ± 2.17 Bq kg⁻¹ and 217.51 ± 8.75 Bq kg⁻¹, respectively, measured ...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/nct131

    authors: Dhawal SJ,Phadatare MR,Thorat ND,Kulkarni GS,Pawar SH

    更新日期:2013-12-01 00:00:00

  • Active neutron dosemeters based on microdosimetric principles: research studies.

    abstract::Over the past few years, the Institute for Radiation Protection and Nuclear Safety (IRSN) has been studying a personal electronic neutron dosemeter and an ambient electronic neutron dosemeter based on experimental microdosimetric principles using low pressure proportional counters. The results obtained in 2000 and in ...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/oxfordjournals.rpd.a006808

    authors: Ménard S,Chau Q,Lahaye T

    更新日期:2002-01-01 00:00:00

  • Analysis and improvement of cyclotron thallium target room shield.

    abstract::Because of high neutron and gamma-ray intensities generated during bombardment of a thallium-203 target, a thallium target-room shield and different ways of improving it have been investigated. Leakage of neutron and gamma ray dose rates at various points behind the shield are calculated by simulating the transport of...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncn099

    authors: Hajiloo N,Raisali G,Aslani G

    更新日期:2008-01-01 00:00:00

  • Comparative analysis between radiation doses obtained by EPR dosimetry using tooth enamel and established analytical methods for the population of radioactively contaminated territories.

    abstract::A comparative analysis of radiation doses determined by tooth enamel electron paramagnetic resonance (EPR) spectroscopy and by an acknowledged analytical method is performed for individual doses and for average doses in population of some settlements of the Bryansk region (Russia), which have been contaminated after t...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncu132

    authors: Ivannikov AI,Skvortsov VG,Stepanenko VF,Zhumadilov KSh

    更新日期:2014-06-01 00:00:00

  • Indoor radon measurements in Turkey dwellings.

    abstract::In this work, indoor radon radioactivity concentration levels have been measured in dwellings of Turkey within the frame of the National Radon Monitoring Programme. The (222)Rn concentrations were measured with time-integrating passive nuclear etched track detectors in 7293 dwellings in 153 residential units of 81 pro...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncu329

    authors: Celebi N,Ataksor B,Taskın H,Bingoldag NA

    更新日期:2015-12-01 00:00:00

  • Dosimetric feature of natural biotite mineral.

    abstract::A thermoluminescence (TL) study relevant to radiation dosimetry has been carried out for X-ray irradiated biotite mineral under un-annealed and different annealed (473, 573, 673 and 773 K) conditions. Some significant variations in dosimetric characteristics have been observed with annealing treatment. Due to generati...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncu289

    authors: Kalita JM,Wary G

    更新日期:2015-04-01 00:00:00

  • Review of international standards for dosemeters.

    abstract::International standards for radiation protection dosemeters are published by the International Electrotechnical Commission and the International Organization for Standardization. Several standards exist side by side, although they treat the same measuring task, and specify different requirements, so that dosemeters of...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章,评审

    doi:10.1093/rpd/ncm331

    authors: Behrens R,Ambrosi P

    更新日期:2008-01-01 00:00:00

  • Measurement of neutron inelastic scattering cross sections for 52Cr from threshold up to 18 MeV.

    abstract::The powerful white neutron spectrum from Gelina is used for the investigation of gamma ray production cross sections in the reaction 52Cr(n,n'gamma)52Cr. The gamma rays from the inelastic process are detected with two large volume HPGe detectors placed at 110 degrees and 150 degrees with respect to the beam direction....

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/nci199

    authors: Mihailescu LC,Borcea C,Plompen AJ

    更新日期:2005-01-01 00:00:00

  • Fishing for radiation quality: chromosome aberrations and the role of radiation track structure.

    abstract::The yield of chromosome aberrations is not only dependent on dose but also on radiation quality, with high linear energy transfer (LET) typically having a greater biological effectiveness per unit dose than those of low-LET radiation. Differences in radiation track structure and cell morphology can also lead to quanti...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncv151

    authors: Hill MA

    更新日期:2015-09-01 00:00:00

  • Current challenges of full field digital mammography.

    abstract::Full field digital mammography (FFDM) has advantages over screen-film mammography (SFM), but some important challenges remain. The first challenge is related to the specific characteristics of FFDM. It remains unclear, which shape and limiting values of the modulation transfer function have the most influence on the p...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/nci729

    authors: Van Ongeval C,Bosmans H,Van Steen A

    更新日期:2005-01-01 00:00:00

  • ORGANIC SCINTILLATOR FOR REAL-TIME NEUTRON DOSIMETRY.

    abstract::We developed a radiation detector based on an organic scintillator for spectrometry and dosimetry of out-of-field secondary neutrons from clinical proton beams. The detector consists of an EJ-299-34 crystalline organic scintillator, coupled by fiber optic cable to a silicon photomultiplier (SiPM). Proof of concept mea...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncx255

    authors: Beyer KA,Di Fulvio A,Stolarczyk L,Parol W,Mojzeszek N,Kopéc R,Clarke SD,Pozzi SA

    更新日期:2018-08-01 00:00:00

  • OCCUPATIONAL EXPOSURE CHARACTERISTICS AND FACTORS ASSOCIATED WITH RADIATION DOSES AMONG KOREAN RADIATION WORKERS.

    abstract::This study identified occupational factors associated with radiation exposure in Korea. Survey data of 16 037 workers from 2016 to 2017, including lifestyle factors and occupational characteristics, were combined with the National Dose Registry. Higher average annual doses were observed in groups exhibiting health ris...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncaa019

    authors: Kim J,Seo S,Lee DN,Park S,Im KJ,Park S,Jin YW

    更新日期:2020-07-07 00:00:00

  • Review of the correlation between results of cytogenetic dosimetry from blood lymphocytes and EPR dosimetry from tooth enamel for victims of radiation accidents.

    abstract::The goal of this study was to compare dose estimates from electron paramagnetic resonance (EPR) dosimetry with teeth and cytogenetic dosimetry with blood lymphocytes for 30 victims of radiation accidents. The whole-body exposures estimated by tooth enamel EPR dosimetry were ranging from 0.01 to 9.3 Gy. Study group com...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncu203

    authors: Khvostunov IK,Ivannikov AI,Skvortsov VG,Nugis VY,Golub EV

    更新日期:2015-03-01 00:00:00

  • Spectral correction factors for conventional neutron dosemeters used in high-energy neutron environments.

    abstract::High-energy neutrons (>10 MeV) contribute substantially to the dose fraction but result in only a small or negligible response in most conventional moderated-type neutron detectors. Neutron dosemeters used for radiation protection purpose are commonly calibrated with (252)Cf neutron sources and are used in various wor...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncu298

    authors: Lee KW,Sheu RJ

    更新日期:2015-04-01 00:00:00

  • Medical management of radiation accidents: capabilities and deployment principles of the Bundeswehr Institute of Radiobiology.

    abstract::Radiation accidents are fortunately infrequent occurrences, but since their consequences can be very serious as in the Chernobyl and the Fukushima nuclear accidents, medical management of radiation accidents is of great importance. Besides several other tasks, medical management of radiation accidents is one of the ke...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncs159

    authors: Dörr H,Meineke V

    更新日期:2012-10-01 00:00:00

  • SPECTROSCOPIC STUDY ON POLY(ACRYLIC ACID-CO-ACRYLAMIDE)-GRAFT-POLYANILINE AS A RADIATION DOSIMETER FOR ALPHA PARTICLES.

    abstract::Poly(acrylate-co-acrylamide) was a synthesis by chemical oxidation polymerization of an aqueous binary mixture of acrylate/acrylamide (1:1 mole ratio) using ammonium persulphate as an initiator at 70°C under the nitrogen atmosphere. The obtained copolymer was introduced for grafting with polyaniline. The grafting proc...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncx124

    authors: Abd El-Mageed HR,Abd El-Salam HM,Eissa MF

    更新日期:2018-03-01 00:00:00

  • High survival of frozen cells irradiated with gamma radiation.

    abstract::Cell storage in liquid nitrogen (LN) offers the most secure method of cell preservation even if cryopreserved cells are exposed to natural background of ionising radiation (IR). A lot of experiments have demonstrated that IR can induce damages in living cells, but only a little information regarding the response of cr...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/ncq541

    authors: Cugia G,Centis F,Del Zotto G,Lucarini A,Argazzi E,Zini G,Valentini M,Bono M,Picardi F,Stramigioli S,Cesarini W,Zamai L

    更新日期:2011-02-01 00:00:00

  • Naturally occurring radioactive materials (NORM) in ashes from a fuel-oil power plant in Cienfuegos, Cuba, and the associated radiation hazards.

    abstract::The radioactivity of NORM was measured in ashes collected from a fuel-oil power plant in Cienfuegos, Cuba, using an HPGe gamma-ray spectrometer. The (226)Ra, (210)Pb, (40)K, (232)Th and (238)U activity concentrations reached 240, 77, 59, 70 and 15 Bq kg(-1), respectively. The potential radiological hazard of these res...

    journal_title:Radiation protection dosimetry

    pub_type: 杂志文章

    doi:10.1093/rpd/nct237

    authors: Alonso-Hernández CM,Bernal-Castillo J,Morera-Gómez Y,Guillen-Arruebarrena A,Cartas-Aguila HA,Acosta-Milián R

    更新日期:2014-03-01 00:00:00