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Author :
Publisher :
ISBN 13 : 9780913392171
Total Pages : pages
Book Rating : 4.3/5 (921 download)
Download or read book Guidance on Radiation Dose Limits for the Lens of the Eye written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 : 9780983545026
Total Pages : pages
Book Rating : 4.5/5 (45 download)
Download or read book Guidance on Radiation Dose Limits for the Lens of the Eye written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : International Atomic Energy Agency
Publisher :
ISBN 13 : 9789201152138
Total Pages : 0 pages
Book Rating : 4.1/5 (521 download)
Download or read book Implications for Occupational Radiation Protection of the New Dose Limit for the Lens of the Eye written by International Atomic Energy Agency and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides interim guidance on the implications of the new dose limit for the lens of the eye for occupational radiation protection that is applicable to planned, exposure situations. The new dose limit for the lens of the eye was included in GSR Part 3: Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards, Interim edition, (2011). In the longer term, the guidance provided in this publication will form the basis for the consensus guidance in relation to the new dose limit for the lens of the eye that is to be provided in two safety guides currently being developed.
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (113 download)
Download or read book Implications for Occupational Radiation Protection of the New Dose Limit for the Lens of the Eye written by and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This publication provides interim guidance on the implications of the new dose limit for the lens of the eye for occupational radiation protection that is applicable to planned, exposure situations. The new dose limit for the lens of the eye was included in GSR Part 3: Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards, Interim edition, (2011). In the longer term, the guidance provided in this publication will form the basis for the consensus guidance in relation to the new dose limit for the lens of the eye that is to be provided in two safety guides currently being developed."--Publisher's description.
Author : National Council on Radiation Protection and Measurements
Publisher : NCRP
ISBN 13 : 0929600304
Total Pages : 95 pages
Book Rating : 4.9/5 (296 download)
Download or read book Limitation of Exposure to Ionizing Radiation written by National Council on Radiation Protection and Measurements and published by NCRP. This book was released on 1993 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: NCRP Report No. 116 is the latest in the long series of reports on basic radiation protection criteria that began in 1934. It supersedes the predecessor in the series, NCRP Report No. 91, which was published in 1987. The current Report takes advantage of new information, evaluations and thinking that have developed since 1987, particularly the risk estimate formulations set out in NCRP Report No. 115. While the recommendations set out in this Report do not constitute a radical revision of the basic criteria, they do represent a refinement of the system enunciated in Report No. 91. Important changes include the utilization of revised tissue/organ weighting factors and the introduction of radiation weighting factors. Also noteworthy is the introduction of an allowable reference level of intake. Noteworthy too is the recommendation of an age-based lifetime limit for control of occupational exposures and a major simplification of limits aimed at controlling the exposure of the embryo and fetus. This Report, after outlining the goals and philosophy of radiation protection and the basis for exposure limits, goes on to review, in some detail, absorbed dose, equivalent dose, radiation weighting factors, and effective dose. Committed equivalent dose and committed effective dose are also introduced. Risk estimates for radiation exposure are presented and then the dose limits are enunciated. The Report also covers exposure in excess of the limits, limits for unusual occupational situations, guidance for emergency occupational exposure, and remedial action levels for naturally occurring radiation.
Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309371333
Total Pages : 203 pages
Book Rating : 4.3/5 (93 download)
Download or read book Airport Passenger Screening Using Backscatter X-Ray Machines written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-01-10 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Passenger screening at commercial airports in the United States has gone through significant changes since the events of September 11, 2001. In response to increased concern over terrorist attacks on aircrafts, the Transportation Security Administration (TSA) has deployed security systems of advanced imaging technology (AIT) to screen passengers at airports. To date (December 2014), TSA has deployed AITs in U.S. airports of two different technologies that use different types of radiation to detect threats: millimeter wave and X-ray backscatter AIT systems. X-ray backscatter AITs were deployed in U.S. airports in 2008 and subsequently removed from all airports by June 2013 due to privacy concerns. TSA is looking to deploy a second-generation X-ray backscatter AIT equipped with privacy software to eliminate production of an image of the person being screened in order to alleviate these concerns. This report reviews previous studies as well as current processes used by the Department of Homeland Security and equipment manufacturers to estimate radiation exposures resulting from backscatter X-ray advanced imaging technology system use in screening air travelers. Airport Passenger Screening Using Backscatter X-Ray Machines examines whether exposures comply with applicable health and safety standards for public and occupational exposures to ionizing radiation and whether system design, operating procedures, and maintenance procedures are appropriate to prevent over exposures of travelers and operators to ionizing radiation. This study aims to address concerns about exposure to radiation from X-ray backscatter AITs raised by Congress, individuals within the scientific community, and others.
Download or read book Radiological Protection - Procedures for Monitoring the Dose to the Lens of the Eye, the Skin and the Extremities written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 : 9781944888022
Total Pages : pages
Book Rating : 4.8/5 (88 download)
Download or read book Implications of Recent Epidemiologic Studies for the Linear Nonthreshold Model and Radiation Protection written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rakesh Khatri
Publisher : Cambridge University Press
ISBN 13 : 1107030021
Total Pages : 229 pages
Book Rating : 4.1/5 (7 download)
Download or read book Complications of Neuroendovascular Procedures and Bailout Techniques written by Rakesh Khatri and published by Cambridge University Press. This book was released on 2016-09-08 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes management of neuroendovascular complications, focusing on tips and tricks for 'bailout' procedures.
Author : Daniel Plitnik
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (133 download)
Download or read book Radiation Dose to the Lens of the Eye in US Navy Medical Workers written by Daniel Plitnik and published by . This book was released on 2021 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2012, the International Committee for Radiation Protection (ICRP) published a report recommending a change in the allowable lens dose equivalent from 150 mSv per year to 20 mSv per year averaged over five years not to exceed 50 mSv in any one year. This recommendation is based on new research which suggests that radiogenic cataracts may be caused by doses of radiation significantly lower than previously believed. As of this time, there is no current proposed rule by the United States to adopt similar more restrictive dose limits due to lack of research into current doses and potential disruption into existing operations. Previous research into this issue suggests that doses are relatively stable but widely variable due to differences in dosimetry technology, monitoring techniques, radiation safety practices, and technological differences. This thesis used 17 years historical dosimetry data from the Naval Dosimetry Center to analyze the risk of exceeding ICRP’s suggested lens dose equivalent limits in Navy facilities. 4,182 dose reading entries are analyzed and show that although there are minor differences in the mean lens dose equivalent between years, there is no trend of increasing dose over time. Only one individual of 996 exceeded the proposed lower dose limit. Based on the analyses in this thesis, adoption of the proposed dose limits could occur with minimal disruption to current administrative and work practices.
Author : Benjamin Paul Sonnenblick
Publisher :
ISBN 13 :
Total Pages : 386 pages
Book Rating : 4.3/5 (91 download)
Download or read book Protection in Diagnostic Radiology written by Benjamin Paul Sonnenblick and published by . This book was released on 1959 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Research Council
Publisher : National Academies
ISBN 13 : 0309039959
Total Pages : 436 pages
Book Rating : 4.3/5 (9 download)
Download or read book Health Effects of Exposure to Low Levels of Ionizing Radiation written by National Research Council and published by National Academies. This book was released on 1990-02-01 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reevaluates the health risks of ionizing radiation in light of data that have become available since the 1980 report on this subject was published. The data include new, much more reliable dose estimates for the A-bomb survivors, the results of an additional 14 years of follow-up of the survivors for cancer mortality, recent results of follow-up studies of persons irradiated for medical purposes, and results of relevant experiments with laboratory animals and cultured cells. It analyzes the data in terms of risk estimates for specific organs in relation to dose and time after exposure, and compares radiation effects between Japanese and Western populations.
Author : ICRP,
Publisher : SAGE Publications Limited
ISBN 13 : 9781526459039
Total Pages : 120 pages
Book Rating : 4.4/5 (59 download)
Download or read book ICRP Publication 139 written by ICRP, and published by SAGE Publications Limited. This book was released on 2019-09-12 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : ICRP,
Publisher : SAGE Publications Limited
ISBN 13 : 9781526434982
Total Pages : 144 pages
Book Rating : 4.4/5 (349 download)
Download or read book ICRP Publication 135 written by ICRP, and published by SAGE Publications Limited. This book was released on 2017-10-29 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Clarke
Publisher :
ISBN 13 : 9781999988524
Total Pages : 320 pages
Book Rating : 4.9/5 (885 download)
Download or read book FRCR Physics Notes written by Christopher Clarke and published by . This book was released on 2020-11-13 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive medical imaging physics notes aimed at those sitting the first FRCR physics exam in the UK and covering the scope of the Royal College of Radiologists syllabus. Written by Radiologists, the notes are concise and clearly organised with 100's of beautiful diagrams to aid understanding. The notes cover all of radiology physics, including basic science, x-ray imaging, CT, ultrasound, MRI, molecular imaging, and radiation dosimetry, protection and legislation. Although aimed at UK radiology trainees, it is also suitable for international residents taking similar examinations, postgraduate medical physics students and radiographers. The notes provide an excellent overview for anyone interested in the physics of radiology or just refreshing their knowledge. This third edition includes updates to reflect new legislation and many new illustrations, added sections, and removal of content no longer relevent to the FRCR physics exam. This edition has gone through strict critique and evaluation by physicists and other specialists to provide an accurate, understandable and up-to-date resource. The book summarises and pulls together content from the FRCR Physics Notes at Radiology Cafe and delivers it as a paperback or eBook for you to keep and read anytime. There are 7 main chapters, which are further subdivided into 60 sub-chapters so topics are easy to find. There is a comprehensive appendix and index at the back of the book.
Author : Colin John Martin
Publisher :
ISBN 13 : 9780750321983
Total Pages : pages
Book Rating : 4.3/5 (219 download)
Download or read book Guidance on the Personal Monitoring Requirements for Personnel Working in Healthcare written by Colin John Martin and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Arrangements for personal monitoring have evolved as dose limits and practices using radiation have developed. Therefore, new approaches involving more personal dosimetry are required, and methods are needed that can be used to predict probable dose levels so that risk assessments can be prepared to determine the level of dose monitoring for individual staff members. The authors set out recommendations designed to help radiation protection practitioners and healthcare workers assess exposure levels for personnel and determine monitoring requirements based on established rules. This book is essential reading for medical physicists in radiation protection, diagnostic radiology and nuclear medicine, as well as radiographers and technologists due to changes in global dosimetry requirements. Additionally, it presents guidelines for medical physicists and others using radiation. Part of IPEM-IOP Series in Physics and Engineering in Medicine and Biology.
Author : Sara Principi
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (112 download)
Download or read book Development of Methodologies for Estimating the Dose to the Eye Lens in Interventional Radiology : Operational Implications of the Eye Lens New Dose Limit written by Sara Principi and published by . This book was released on 2018 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent epidemiological evidences on very late opacities or cataract manifestation, has led to a review of the actual limit for the eye lens (150 mSv/year) for workers exposed to ionizing radiation. ICRP 118 recommends reducing the limit to 20 mSv per year. This drastic change in the dose limit has been incorporated into the revised European and International Basic Safety Standards (European Commission 2013, International Atomic Energy Agency 2014) and it should be implemented in national legislation of member states in 2018. Up to now, eye lens dose is not routinely measured and there are no general international recommendations regarding procedures on how correctly estimate the dose to the eye lens. The present work provides proposals regarding metrological, dosimetric and radiation protection needs associated to the new limit. At first, a calibration procedure and an easy-to use dosemeter for the eye lens have been set-up to accurately measure eye lens doses in terms of Hp(3) for photon radiation fields. Secondly, a measurement campaign on phantom was performed in order to test several dosimetric systems and to analyze the influence of the position of the eye lens dosemeter. The best position for an accurate assessment of the eye lens dose is to locate the dosemeter as close as possible to the most exposed eye. Measurements at four Spanish hospitals in real clinical conditions were performed in order to evaluate whether the risk of exceeding the new recommended eye lens dose limit of 20 mSv per year is of real concern. 24 physicians and 12 nurses were monitored. Results show that approximately 40% of the monitored physicians and 25 % of monitored nurses would exceed the new limit. The relation between the eye lens equivalent dose Hp(3) and other quantities, easier to measure such as Hp(0.07) with an unprotected whole body dosemeter situated at the chest or the KAP registered in the X-ray console have been investigated. Results highlight that the relation between Hp(3) and Hp(10) or Hp(0:07) measured on the chest or collar with an unprotected whole body dosemeter is more reproducible than the relationship between Hp(3) and KAP, in particular in the case of nurses. Large uncertainties are associated to the estimation of Hp(3) through other quantities (such as KAP or whole body doses). The relationship is dependent on the type of procedure, position of the monitored person and use of protection means. Thus, this methodology is only recommended for monitoring of staff exposed to eye lens doses below 6 mSv or in order to identify which individuals are likely to require regular eye lens monitoring. The recommended correction factor is Hp(3)=0.8Hp(0.07)thorax. For individuals at risk, the use of a dedicated eye lens dosemeter is strongly recommended. Monte Carlo simulations were carried out in order to analyse the influence of several parameters on eye lens equivalent dose and to provide recommendations on eye lens dose reduction and on the effectiveness of the protective glasses. This thesis proposes simple precautions to reduce the dose, such as the positioning of the monitors away from the X-rays. A rotation of the head of 30o or 45o away from the tube is shown to reduce eye lens dose by approximately 50%, in particular at distances of 20cm and 40cm from the X-ray source. Furthermore, a correction factor of 0.3 for wraparound-style lead glasses and a more conservative value of 0.5 for any design of glasses is recommended. This correction should be applied when an eye lens dosemeter is used on an unprotected region close to the eye, as the measurement of the eye lens equivalent dose does not take into account the protection provided by the glasses. This proposal is in agreement with several published work and with the recommendations from ISO in 2015. Finally, this thesis highlights the need of training to improve the use of the protection systems, in particular the ceiling shielding during clinical practice.
