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3 edition of Effects of ionizing radiation on auditory and visual thresholds found in the catalog.

Effects of ionizing radiation on auditory and visual thresholds

Effects of ionizing radiation on auditory and visual thresholds

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Published by Defense Nuclear Agency in Alexandria, VA .
Written in English

    Subjects:
  • Ionizing radiation.

  • Edition Notes

    StatementRobert D. Hienz.
    SeriesDNA-TR -- 91-47., Technical report (United States. Defense Nuclear Agency) -- DNA-TR-91-47.
    ContributionsUnited States. Defense Nuclear Agency.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18054944M

      IAEA 3: Biological effects of ionizing radiation3: Biological effects of ionizing radiation Injury Threshold Dose to Skin (Sv) Weeks to Onset Early transient erythema 2 14 Telangiectasis 12 >52 Moist. The two categories are: those arising from stochastic or long-term, low-level chronic exposure and those arising from non-stochastic or high levels of radiation exposure. Generally, non-ionizing radiation effects are deemed to be stochastic in nature, as the radiation is considered lower energy and therefore may take time to show noticeable effect. Hearing effect pulsed microwaves evoke brain responses similar to auditory stimuli. [] [] [] Radio frequency exposure increases human hearing threshold for auditory tones. [] Sound also decreases the brain stem microwave hearing response. [].


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Effects of ionizing radiation on auditory and visual thresholds Download PDF EPUB FB2

These higher radiation doses have had less of an effect on visual intensity thresholds, producing a 5- lO dB deficit in visual thresholds. No physical damage to the cornea iris lens or retina Author: Robert Hienz. Get this from a library. Effects of ionizing radiation on auditory and visual thresholds.

[Robert D Hienz; United States. Defense Nuclear Agency.]. Effects of Ionizing Radiation on Auditory and Visual Thresholds C -DNA C PE - H 6. AUTHOR(S) PR -RM TA -RF Robert D. Hienz WU -DH 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8.

PERFORMING ORGANIZATION REPORT NUMBER Johns Hopkins University School of Medicine Rutland Avenue Baltimore, MD Author: Robert D Hienz. The human eye is exposed to a wide range of radiant energy aside from the visual spectrum, including ultraviolet, infrared, microwave, and ionizing radiation. Of these, ionizing radiation can cause some of the most significant and long-lasting damage to the lens, conjunctiva, and cornea.

Ionizing sources include natural levels from cosmic (30 Cited by: 3. ionizing radiation present in our environment includes ultraviolet, visible light, infrared,microwaves, and radio-frequency waves as indicated by Table I. Ultraviolet radiation is important for a number of biological processes and has also been shown to have deleterious effects on certain biological systems.

One effect of ultraviolet radiation that. Effects of ionizing radiation on the haematopoietic and immune systems [U8] Radiation-induced cancer: impairment of immunological surveillance [U7] Haematological and immunological effects of ionizing radiation [U6] Annex B, part III: Effects of ionizing radiation on the immune system in the context of adaptive response [U4].

izing radiation have been extensively studied and docu-mented. Epidemiological data on the carcinogenic effects of exposure to ionizing radiation are the subject of con-tinuing reviews by UNSCEAR (see annex A to this report, “Epidemiological studies of radiation and cancer”, and, for example, references [U2, U4, U6]).

The effects of expo-File Size: KB. IONIZING RADIATION 82 3. SUMMARY OF HEALTH EFFECTS OF IONIZING RADIATION appeared to have redistributed from the lungs to the bones and, given its long physical half-time (t1/2) of years, would have irradiated the surrounding tissues for a lengthy period of time to produce a cancerous end Size: KB.

Environmental Medicine /90 $ + Health Effects of Nonionizing Radiation Gearge M. Wilkening, MS,* and earl H. Suttan, MDt I. BIOLOGIC EFFECTS OF MICROWAVE AND RADIOFREQUENCY ENERGY Microwave and Effects of ionizing radiation on auditory and visual thresholds book energy are examples of non ionizing radiation, which is completely different from ionizing radiation, including nuclear Cited by: 8.

Overview of Effects and Protection of Non-Ionizing Radiation Maila Hietanen, Professor non-ionizing radiation - ICNIRP 7/99. ICNIRP Statements on: —radiation risks from visual display units —fluorescent lighting and malignant melanoma —UV sunbeds —light emitting diodesFile Size: 2MB.

ABSTRACT Objective: To test the hypothesis that fractionated radiation therapy of less 50 Gy is associated with a dose-related change in the Tl of normal brain tissue, and that these changes are detectable by quantitative MRI. What are some obvious effects of ionising radiation exposure. Extreme doses of radiation to the whole body (around 10 sievert and above), received in a short period, cause so much damage to internal organs and tissues of the body that vital systems cease to function and death may result within days or weeks.

Very high doses (between about 1 sievert and 10 sievert). This small book is more informative than any other condensed Russian book which the reviewer has seen on this subject. It is divided into two parts: (a) effects of ionizing radiation on the analyzers, ie, viual, auditory, cutaneous, taste, olfactory, vestibular, interoceptive, and pain, and (b) effects of ionizing radiation on the peripheral and central Cited by: 1.

The effects of ionizing radiation on the ears of patients were studied in the course of treatment of malignant head and neck tumors by teleradiation using Co Early changes consisted of radiation otitis media and a transient vasculitis of the vessels of the inner ear, resulting in hearing loss, tinnitus, and temporary recruitment.

Radiation doses have to reach a certain level to produce acute injury but not to cause cancer or genetic damage. No biological effects in individuals have ever been documented as being due to levels of ionizing radiation employed for medical diagnosis.

Absorbed doses from nuclear medicine procedures are very low. Ionizing radiation causes a chemical change and thus causes more damage than non-ionizing radiation.

Still, observable effects can be tracked from non-ionizing radiation. Visible light, infrared light, microwaves, and radio waves are some examples of non-ionizing radiation. The light from the sun that reaches Earth is largely non-ionizing.

Exposure to ionizing radiation (IR) could affect the human brain and eyes leading to both cognitive and visual impairments. The aim of this paper was to. Language: English MeSH: Auditory Threshold/radiation effects*; Psychomotor Performance/radiation effects*; Radiation, Ionizing*; Reaction Time/radiation effects*; Visual Perception/radiation effects* Publication Type(s): Technical Report Notes: Cover title.

Performing organization: Johns Hopkins University School of Medicine. "March ". Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF.

Visit to get more information about this book, to buy it in print, or to download it as a free PDF. Purpose Compared to photon-based radiotherapy, protons deliver less radiation to healthy tissue resulting in the potential reduction of late complications such as sensorineural hearing loss (SNHL).

We report early auditory outcomes in children treated with proton radiotherapy (PRT) for : Johnnie K. Bass, Jie Huang, Chia-Ho Hua, Shaum P.

Bhagat, Lisa Lucks Mendel, Arzu Onar-Thomas, Danie. IONIZING RADIATION IONIZING RADIATION Definition “ It is a type of radiation that is able to disrupt atoms and molecules on which they pass through, giving rise to ions and free radicals”.

Sources – x-rays, radioactive material produce alpha, beta, and gamma radiation, cosmic rays from the sun and space. Radiation Dose in Medicine in which they outlined numerous steps and interventions designed to help address this issue.6 The end user must be aware that there is an age and sex variable regarding adverse organ tissue effects from ionizing radiation.

Typically children and women (breast and ovaries)File Size: KB. Accumulating data suggests that exposure to X-radiation may result in serious health concerns and adverse consequences if used intermittently and when doses of radiation exceed certain thresholds (Hammer et al., ; Bailey et al., ).

Previous studies have investigated the potential hazards of IR and their effect on developing by: 6. Shao-Ling Huang, David D. McPherson, in Cancer Theranostics, Radiation Forces.

Acoustic radiation forces consist of primary forces that direct particles away from the acoustic source and secondary forces that cause attraction between particles such as ultrasound contrast agents [15].Dayton et al. [16] verified that primary radiation forces can push untargeted.

i Health Effects of Exposure to Low Levels of Ionizing Radiation Beir V Committee on the Biological Effects of Ionizing Radiations Board on Radiation Effects Research Commission on Life Sciences National Research Council NATIONAL ACADEMY PRESS Washington, D.C   Radiation therapy is increasingly being used on head and neck tumors, and close to percent of the radiation delivered may reach the structures of the auditory.

During the last 30 years, there has been a remarkable devel opment and increase in the number of processes and devices that utilize or emit non-ionizing radiant energies such as micro waves, a form of electromagnetic wave energy and ultrasound representative of mechanical vibration.

These energies are used in all sectors of our society for military, industrial. Radiation Protection, Chapter 9. Small purple book, chapter 9, Dose Limits for Exposure to Ionizing Radiation. _____ effects are those biologic somatic effects of ionizing radiation that exhibit a threshold dose below which the effect does not normally occur and above which the severity of the biologic damage increases as the dose increases.

consists of harmful ionizing radiation and harmless non-ionizing radiation. When using mobile phone, electromagnetic wave is Figure shows the effect of electromagnetic radiation on human head. Figure Effect of electromagnetic radiation on auditory, visual, etc.).

The information transmitted by. Radiation safety aspects of commercial high-speed flight transportation [microform] / John W.

Wilson. Code of practice for the use of ionizing radiations in secondary schools; Effects of ionizing radiation on auditory and visual thresholds [microform] / Robert D.

Hienz. protection of the environment from the effects of ionizing radiation proceedings of an international conference on the protection of the environment from the effects of ionizing radiation organized by the international atomic energy agency, in cooperation with the united nations scientific committee on the effects of atomic radiation.

Biological Effects of Radiation IAEA - Free download as Powerpoint Presentation .ppt), PDF File .pdf), Text File .txt) or view presentation slides online.

Biological Effects of Radiation Classification of radiation health effects Factors affecting radio sensitivity Dose-effect response curve Whole body response: acute radiation syndrome Effects of antenatal exposure and. health effects have not been detected at any stage of gestation after exposure to ionizing radiation of less than Gy (5 rad).

Spontaneous abortion, growth restriction, and mental retardation File Size: KB. It is especially important to know if there is a threshold for the dose–effect relation for ionizing radiation.

If there is no threshold, there is a (small) risk associated with even very low exposure levels. Sources and Effects of Ionizing Radiation: UNSCEAR Report classical and instrumental conditioning, and visual, auditory. On Novemthe Nuclear and Radiation Studies Board of the National Academy of Sciences will be hosting a meeting to assist with scoping the next Biological Effects of Ionizing Radiation (BEIR) report—the BEIR VIII report—on health risks from exposure to low levels of ionizing radiation.

late and low-level effects of ionizing radiation airplane flight increases individual exposure by mrem/h because the level of cosmic radiation is greater at 36, feet than at sea level.2 As humans venture farther from the protective atmosphere in extremely high-altitude flights, their background occupationalFile Size: KB.

Health effects. Types of health effects. Deterministic effects (or tissue reactions) of ionising radiation are related directly to the absorbed radiation dose and the severity of the effect increases as the dose increases. A deterministic effect typically has a threshold (of the order of magnitude of Gy or higher) below which the effect does not occur.

Stochastic (probabilistic) somatic effects - when late effects are mutational or randomly occurring biologic somatic effects Do not have a threshold, occur in an arbitrary manner, have a severity that does not depend on dose, and occur months or years after a high-level radiation dose.

Piontkovskoyo, Effects of Ionizing Radiation on the Functions of the Higher Nervous System of Progeny [Medzig, Moscow, (AEC-tr)]. In this review of this work, the similarities anddivergencies betweenthe American and Soviet approaches to this area of research became appar-ent. This was made evident, in the Russian research, by the use Cited by: 1.

AFRRI mission is to preserve the health and performance of U.S. military personnel and to protect humankind through research that advances understanding of the effects of ionizing radiation. To these ends, the institute collaboratively researches the biological effects of ionizing radiation and provides medical training and emergency response.

At sufficiently high flux levels, various bands of electromagnetic radiation have been found to cause deleterious health effects in people. Electromagnetic radiation can be classified into two types: ionizing radiation and non-ionizing radiation, based on the capability of a single photon with more than 10 eV energy to ionize oxygen or break chemical bonds.Cellular Basis and Aetionlogy of Late Somatic Effects of Ionizing Radiation by Edited by R.

J. C. Harris and a great selection of related books, art and collectibles available now. To explain what ionizing radiation is, we will start with a discussion of atoms, how they come to be radioactive, and how they give off ionizing radiation.

Then, we will explain where radiation comes from. Finally, we will describe the more important types of radiation to which you may be exposed. Of the different types and sources of ionizing radiation, this .