• ICLDRR's main focus is to contribute to clarifying whether low and very low doses of ionizing radiation increase the risk of cancer. (wikipedia.org)
  • To that end, the ICLDRR has assembled and analysed virtually all published data on cancer induction in laboratory animals by low doses of ionizing radiation, and published initial findings at specialized international conferences, since 1998. (wikipedia.org)
  • When beliefs are abandoned and evidence from only whole body exposures to mammals is considered, it becomes obvious that increased ionizing radiation would provide abundant health," Luckey explains. (scienceblog.com)
  • This represents good evidence that we live with a partial radiation deficiency and that greater exposure to radiation would improve our health, a notion supported by 130 on the health of people living in parts of the world with higher background levels of ionizing radiation than average. (scienceblog.com)
  • It is unfortunate that most literature of radiobiology involves fear and regulations about the minimum possible exposure with no regard for radiation as a beneficial agent," says Luckey, "Those who believe the Linear No Threshold (LNT) dogma have no concept about any benefits from ionizing radiation. (scienceblog.com)
  • Many radiobiologists get paid to protect us from negligible amounts of ionizing radiation. (scienceblog.com)
  • Professor André Maïsseu, the journal's Editor-in-Chief, and President of the World Council of Nuclear Workers WONUC) says: "This is a very bright, interesting and important paper about the real effects of ionizing radiation - radioactivity - on humans, mammals and biotopes. (scienceblog.com)
  • However, they did find a comparatively increased frequency of micronuclei in the radiologists, which are fragments of DNA produced when ionizing radiation breaks DNA strands. (auntminnie.com)
  • We conclude that long-term exposure to low doses of [ionizing radiation] can induce formation of micronuclei in the PBL of interventional radiologists," the group wrote. (auntminnie.com)
  • Ionizing radiation is a known and well-quantified human cancer risk factor, based on a remarkably consistent body of information from epidemiological studies of exposed populations. (nih.gov)
  • This chapter and the two other "auxiliary chapters" (Chapters 20 and 21 ) provide the support for certain points used in the proof that no safe dose of low-LET ionizing radiation exists -- either for acute exposure or for slow exposure -- with respect to human carcinogenesis. (ratical.org)
  • With respect to ionizing radiation, "dose" is a macroscopic concept describing the total energy deposited in tissue, and tissue-doses are expressed in energy-units per gram of irradiated tissue. (ratical.org)
  • One need only consider the common fever in order to ponder the very high probability that the biological potency of ionizing radiation is related to its spatial concentration along tracks, rather than to its meager addition of energy to cells ( Go81 , pp.52-53). (ratical.org)
  • A dose of 400 cGy (400 rads) is equivalent in heat to only 4.184 x 10^-3 joules per gram of tissue -- enough to provoke a mini-fever of 0.001 degree Centigrade -- yet 400 cGy of ionizing radiation to the whole body, acutely delivered, will kill about half the humans exposed to it. (ratical.org)
  • Ionizing radiation as a toxic agent differs fundamentally from toxic substances, which can be introduced to a solution slowly and diluted to a lower and lower uniform concentration. (ratical.org)
  • Because the minimal event in dose-delivery of ionizing radiation is a single track, we can define the least possible disturbance to a single cell-nucleus: It is the traversal of the nucleus by just one primary ionization track. (ratical.org)
  • but rather, "What human studies exist which can address carcinogenesis (or its absence) when cell nuclei experience the least possible disturbance by ionizing radiation? (ratical.org)
  • Ionizing radiation has enough energy to remove electrons from their associated atoms or molecules. (radiationsafety.ca)
  • As a result, exposure to ionizing radiation (which includes x-rays, gamma rays, alpha and beta particles) can increase a person's risk to developing cancer. (radiationsafety.ca)
  • But ionizing radiation is used to create images of internal organs of the human body and to treat cancer. (radiationsafety.ca)
  • Medical professionals must weigh the benefits using ionizing radiation with the associated risk. (radiationsafety.ca)
  • This Public Health Statement is the summary chapter from the Toxicological Profile for ionizing radiation . (cdc.gov)
  • This public health statement tells you about ionizing radiation and the effects of exposure. (cdc.gov)
  • It does not tell you about non-ionizing radiation, such as microwaves, ultrasound, or ultraviolet radiation. (cdc.gov)
  • Exposure to ionizing radiation can come from many sources. (cdc.gov)
  • You can learn when and where you may be exposed to sources of ionizing radiation in the exposure section below. (cdc.gov)
  • However, it's unknown how many of the 1,467 current or former NPL sites have been evaluated for the presence of ionizing radiation sources. (cdc.gov)
  • As more sites are evaluated, the sites with ionizing radiation may increase. (cdc.gov)
  • This information is important because exposure to ionizing radiation may harm you and because these sites may be sources of exposure. (cdc.gov)
  • Even in the event that you are exposed, it does not necessarily mean you will be harmed or suffer longterm health effects from exposure to ionizing radiation. (cdc.gov)
  • If you are exposed to ionizing radiation, many factors determine whether you'll be harmed. (cdc.gov)
  • What is ionizing radiation? (cdc.gov)
  • 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. (cdc.gov)
  • Of the different types and sources of ionizing radiation, this profile will discuss the three main types: alpha, beta, and gamma radiation. (cdc.gov)
  • Before defining ionizing radiation, it is useful to first describe an atom. (cdc.gov)
  • Ionizing radiation is energy that is carried by several types of particles and rays given off by radioactive material, x ray machines, and fuel elements in nuclear reactors. (cdc.gov)
  • This study provides a detailed characterization of the dose-dependent impact of ionizing radiation on skin cells (45, 60, or 80 grays). (mdpi.com)
  • Decreasing dose variability through proper management of CT parameters in pediatric populations using benchmarks generated by data from registries can potentially decrease population exposure to ionizing radiation. (ajnr.org)
  • Many attempts have been made to quantify risks associated with ionizing radiation use in medical imaging. (ajnr.org)
  • According to a paper [PDF] by Euro eggheads, the annual ESA limit for ionizing radiation is 0.5 sievert (Sv) for bone marrow, spleen, and lymphatic tissues, 1 Sv for your eyes, and 3 Sv for your skin. (theregister.com)
  • Much is known about the effects of high doses of ionizing radiation exposure, but little is known about the effects of low doses of ionizing radiation over extended periods of time. (sc.edu)
  • In order to better understand the impacts of low-dose ionizing radiation on animal populations, bank voles (Myodes glareolus) from the Chernobyl exclusion zone were studied. (sc.edu)
  • However, statistical analyses showed that low-dose ionizing radiation exposure was not associated with significant effects on sex ratio, comet response, or PBMC concentration between control and contaminated areas for the studied voles. (sc.edu)
  • Factors such as the adaptation of the voles to the ionizing radiation, the radioresistant nature of the vole species, storage biases for blood samples, the use of Proteinase K in the comet assay, and trapping biases could have affected the results of the study. (sc.edu)
  • In addition to cell cycle arrest, DNA repair or/and apoptosis, ionizing radiation can also induce premature senescence, which could lead to very different biological consequences depending on the cell type. (tmu.edu.tw)
  • In addition to solar and cosmic rays that are hazardous to astronauts' health, there is also ionizing radiation that threatens their electronic equipment. (universetoday.com)
  • The highlighted topics include basic aspects of biological dosimetry and its limitations in the range of low radiation doses, and main patterns of in vivo induction of radiation biomarkers in clinical exposure scenarios, occurring in X-ray diagnostics, computed tomography , interventional radiology , low dose radiotherapy , and nuclear medicine (internally administered 131I and other radiopharmaceuticals ). (bvsalud.org)
  • After one radiotherapy session, significant clinical response and a good radiological response was observed in both cases, resulting in both patients being discharged from hospital in less than 2 weeks after radiation treatment. (nih.gov)
  • Brachytherapy is a type of radiotherapy that allows high doses of irradiation to be delivered directly to the tumour. (cun.es)
  • The ICLDRR assembles all published data and conducts analyses concerning the effects of low doses of radiation on humans and in the environment. (wikipedia.org)
  • the evidence for a radiation deficiency in humans is compelling. (scienceblog.com)
  • Studies on the growth, average lifespan, and decreased cancer mortality rates of humans exposed to low-dose irradiation show improved health, explains Luckey. (scienceblog.com)
  • Radiation doses accumulated by astronauts in interplanetary space would be several hundred times larger than the doses accumulated by humans over the same time period on Earth, and several times larger than the doses of astronauts and cosmonauts working on the International Space Station," said Jordanka Semkova, lead scientist of the ExoMars Liulin-MO instrument, on Wednesday. (theregister.com)
  • Recent research has shed light on the high rate of spontaneous double-strand breaks in DNA and the adaptive protections in cells, tissues and humans that are up-regulated by low radiation. (atomicinsights.com)
  • RESULTS: The mean effective dose (HE) ranged from 0.31 to 2.75 mSv at 80 kVp, 0.69 to 6.29 mSv at 100 kVp, and 1.53 to 10.7 mSv at 120 kVp. (edu.au)
  • In the past decade, various dose-reduction strategies, such as automated tube current modulation, low voltage scanning, and noise-reduction filters, have been explored but could not prevent a steady increase of average effective dose with advanced scanner technology. (ajnr.org)
  • Plants and their products are well known to have an advantage over the synthetic compounds in terms of their potential low/no toxicity at the effective dose with minimum or no side effects (3,9,33,34,41). (tfljournal.org)
  • The estimation of the effective dose by Monte carlo simulation revealed lower median dose levels 1.72 (range 0.99-2.88) msv.mGy-1.cm-1 Conclusion: Cardiac high-pitch CTA on neonates with CHD can be performed safely and dose reducing protocols can be implemented without compromising image quality. (journalcra.com)
  • Luckey, an emeritus professor of the University of Missouri, was the nutrition consultant for NASA's Apollo 11 to 17 moon missions and has spent the last several years developing the concept of improving health through exposure to low-dose radiation. (scienceblog.com)
  • Long-term exposure to low-dose radiation can cause DNA damage to lymphocyte cells in interventional radiologists - yet importantly, the doctors are likely not vulnerable to an increased risk of leukemia, according to researchers in Slovakia. (auntminnie.com)
  • He chose to have brachytherapy, a kind of internal radiation therapy where seeds, ribbons, or capsules that contain a radiation source are placed in your body, in or near the tumor. (cdc.gov)
  • Background Preclinical evidence suggests that low-dose radiation may overcome the inhibitory effects of the tumor stroma and improve a tumor's response to immunotherapy, when combined with high-dose radiation to another tumor. (bmj.com)
  • During brachytherapy, or internal radiation therapy (IRT), radioactive material is placed into a catheter or another implantable device, which carries the radiation directly into or near a tumor. (cancercenter.com)
  • Intraoperative radiation therapy (IORT) is a form of brachytherapy that delivers a concentrated dose of radiation to the site of a tumor during surgery. (cancercenter.com)
  • Interstitial brachytherapy: The care team places the radiation source directly in or near the tumor rather than in a body cavity. (cancercenter.com)
  • This internal radiation therapy delivers a high-dose of radiation from implants placed close to, or inside, the tumor(s) in the body in a short burst lasting a few minutes. (cancercenter.com)
  • IORT delivers a concentrated dose of radiation to a tumor site immediately after a tumor is removed, helping to destroy the microscopic tumor cells that may be left behind. (cancercenter.com)
  • If complete resection of the tumor cannot be carried out and residual tumor is present either in bone or soft tissue, postoperative megavoltage radiation therapy is indicated. (medscape.com)
  • [ 33 ] Tumor control and survival rates for SRS alone were not found to be inferior to those for SRS plus fractionated radiation therapy. (medscape.com)
  • The patients receiving PT were younger, had a lower tumor grade, more oligodendrogliomas and received a lower mean brain and brainstem dose. (lu.se)
  • Most interesthasbeeninstereotacticradiation(Muranoetal) butfocal therapy maynot apply well forbreastCNScarcinomatosis inpatientsoftenpreviouslytreated  Low-dose radiationhasbeenusedtopotentiate systemicchemotherapyinheadandneck cancer (Arnoldetal) Hypothesis: Low-dose radiationpriortointrathecal trastuzumabmayinduce HER2expressionand improve treatmentefficacyinwomenwithHER2+CNScarcinomatosis. (slideshare.net)
  • Nowadays medical care extensively uses ionising radiation for diagnostic and therapy. (ises-europe.org)
  • It should involve radiology and therapy equipment manufacturers or their associations, European associations of researchers in this field, organisations having a regulatory mandate for radiation protection research from Member States or EU bodies and universities and hospitals. (ises-europe.org)
  • We designed a prospective study of Ultra-Low Doses of Therapy with Radiation Applied to COVID-19 (ULTRA-COVID) for patients who suffer pneumonia, are not candidates for invasive mechanical ventilation and show no improvement with medical therapy. (nih.gov)
  • Brachytherapy: What is Internal Radiation Therapy? (cancercenter.com)
  • This form of internal radiation therapy allows for more targeted radiation treatment, designed to reduce the size of tumors and kill cancer cells. (cancercenter.com)
  • For many cancer types , the entire brachytherapy treatment takes one to two days, instead of five to seven weeks for external beam radiation therapy (EBRT) . (cancercenter.com)
  • With IORT, which stands for interoperative radiation therapy, a radiation oncologist delivers a large dose of radiation in a single treatment session during a surgical procedure. (cancercenter.com)
  • A systematic review by Bin-Alamer et al assessed SRS with or without postoperative fractionated radiation therapy in adults with skull-base chordomas. (medscape.com)
  • Background and Purpose: In order to evaluate the effect of short-term androgen blockade on biochemical control rates for high-risk patients receiving a combination regimen of external-beam radiation therapy and low-dose-rate permanent seed implant brachytherapy, a retrospective matched subset analysis was performed. (elsevierpure.com)
  • Twenty-one patients who underwent androgen ablation between June 1991 and December 1995 in addition to combined-modality radiation therapy qualified as high risk, as did 77 patients who underwent combined-radiation therapy only. (elsevierpure.com)
  • Conclusion: Longer follow-up with larger patient numbers is needed to define the role of adjuvant androgen ablation combined with radiation therapy. (elsevierpure.com)
  • In advanced HCC, dual-energy CT may detect the effects of therapy at lower radiation dose than liver perfusion CT, researchers in France say. (mdct.net)
  • According to a French study , in advanced hepatocellular carcinoma, therapy-induced changes in morphology and perfusion may be assessed from iodine concentrations measured with dual-energy CT, possibly eliminating the need for liver perfusion CT and its higher radiation dose. (mdct.net)
  • Over half of cancer patients undergo radiation therapy (RT). (nature.com)
  • Introduction: Proton radiation therapy (PT) has become a treatment option alongside photon therapy (XRT) for lower-grade gliomas (LGG). (lu.se)
  • In contrast to PMA that enhanced micronucleation and reduced irradiated cell survival at low doses, LNMMA inhibited the micronucleation and enhanced survival in the irradiated cells, indicating the role of nitrosative stress in low-dose sensitivity of cells. (radioprotection.org)
  • Due to fetal sensitivity to radiation, assign pregnant staff to other duties. (cdc.gov)
  • Scholars@Duke publication: Low-dose fractionated radiation potentiates the effects of cisplatin independent of the hyper-radiation sensitivity in human lung cancer cells. (duke.edu)
  • In this study, the role of hyper-radiation sensitivity (HRS) in potentiating the effects of cisplatin by low-dose fractionated radiation (LDFRT) was evaluated in four human non-small cell lung cancer cell lines. (duke.edu)
  • These findings indicate that chemopotentiation by LDFRT is correlated more with the intrinsic radiation sensitivity of the non-small lung cancer cells than the HRS phenomenon whereas the mode of cell killing is both through apoptosis and clonogenic inhibition. (duke.edu)
  • Depending on sensitivity, biological systems react by important precursor cells becoming inactivated by the radiation resulting in no further functioning cells being available. (ensi.ch)
  • This action should take into account the gap analysis performed by MELODI, EURADOS and EURAMED, and address the key issue of individual sensitivity and susceptibility to radiation. (ises-europe.org)
  • The main objective of INPs contribution to the project was to improve the accuracy and sensitivity of TL-based methods of assessing environmental dose rates. (europa.eu)
  • Intercomparison measurements and field measurements have demonstrated the suitability of the INP developed LiF material, TLD equipment and readout techniques for environmental monitoring with superior sensitivity, permitting daily or even hourly dose assessment. (europa.eu)
  • Brachytherapy followed by low-dose radiation. (cdc.gov)
  • Brachytherapy is cancer treatment that involves placing a radiation source inside the body near cancerous tissue. (cancercenter.com)
  • Intracavitary brachytherapy: The care team places the radiation source directly in a body cavity, or a cavity that the surgical team creates. (cancercenter.com)
  • Episcleral brachytherapy: The care team attaches the radiation source to the patient's eye to treat ophthalmic tumors. (cancercenter.com)
  • Brachytherapy offers a quicker, more effective type of radiation treatment for some patients. (cancercenter.com)
  • Low rate brachytherapy is the pioneering technique in minimally invasive prostate cancer treatment. (cun.es)
  • Low-rate prostate brachytherapy , also known as permanent implantation or ' prostate brachytherapy with seeds ", is a minimally invasive technique that allows to implement a radioactive material (radioisotopes Iodine125 or Palladium103) inside the prostate. (cun.es)
  • Low rate prostate brachytherapy is performed in the operating room, under epidural anaesthesia +/- sedation. (cun.es)
  • From these potential exposure pathways, calculate both the radiation doses and risks associated with these exposures. (cdc.gov)
  • eye -lens absorbed dose from occupational radiation exposures was 55.7 mGy (interquartile range 23.6-69.0 mGy). (cdc.gov)
  • Our results suggest that there is excess risk for cataract associated with radiation exposure from low-dose and low dose-rate occupational exposures. (cdc.gov)
  • The hugely influential linear-no-threshold model-which predicted acute exposure damage can be extrapolated linearly to low dose exposures-was flawed. (wsu.edu)
  • In 1999, an accident at a fuel reprocessing plant in Tokaimura, Japan, resulted in radiation exposures that caused acute radiation syndrome (radiation sickness). (ensi.ch)
  • During the operation of an X-ray machine, if the radiation protection of X-ray room is insufficient, not only the patient but also clinical staffs as well as public are exposed to high X-ray exposures. (scirp.org)
  • The scattered radiation exposures of X-rays in some selected areas within the facility were measured. (scirp.org)
  • Additionally, several specific issues, examined by biodosimetry techniques , are analysed, such as contrast media effect, radiation response in pediatric patients , impact of magnetic resonance imaging , evaluation of radioprotectors, detection of patients ' abnormal intrinsic radiosensitivity and dose estimation in persons involved in medical radiation incidents. (bvsalud.org)
  • Radiologists should manage the radiation dose for pediatric patients to maintain reasonable diagnostic confidence. (ajnr.org)
  • We assessed the variation in estimated radiation dose indices for pediatric noncontrast head CT in the United States. (ajnr.org)
  • Considerable variation in the radiation dose index for pediatric head CT exists. (ajnr.org)
  • Median dose indices and practice variations at pediatric facilities were both lower compared with other practice settings. (ajnr.org)
  • Even higher radiation doses can cause cells to die and the organ concerned to stop functioning. (ensi.ch)
  • Previous attempts to characterise cardiovascular risks in cohorts suggests ionising radiation increases the risk of cardiovascular disease. (bmj.com)
  • Because historical records were not maintained to today's standards, the Task 4 team performed independent reviews of environmental monitoring reports and existing data on releases and also used mathematical models to estimate the radiation doses and the associated risks (ChemRisk 1999a). (cdc.gov)
  • Moreover, there were no risks of high radiation doses to patients, staffs and people visiting the X-ray department. (scirp.org)
  • As with any scan of this kind, you will be exposed to some radiation, which has the potential for health risks. (altonmemorialhospital.org)
  • ABSTRACT Previous studies have shown that physicians tend to underestimate the risks to patients of radiation exposure. (who.int)
  • A high dose also leads to shorter time intervals between irradiation, prodromal symptoms and the actual effects. (ensi.ch)
  • Treatment of mice with rosemary extract prior to irradiation is reported herein to prolong life and reduce the symptoms of radiation sickness. (tfljournal.org)
  • Treatment of animals with rosemary extract (1000 mg/ kg body wt) prior to irradiation was found to delay the onset of mortality and reduced the symptoms of radiation sickness such as ruffled hairs, lethargy, anorexia and diarrhea in comparison to radiation alone treated animals. (tfljournal.org)
  • High doses of irradiation directed at the target of the prostate tumour. (cun.es)
  • The patient is discharged once all the prescribed dose of irradiation is administered. (cun.es)
  • In order to understand the basis of increased cellular lethality at low doses as well as the density-mediated suppression of HRS/IRR response, effect of low gamma radiation doses was studied using additional parameters including micronucleation, apoptosis induction and cell cycle progression delay in the absence and presence of inhibitors of gap junctional intercellular communication (GJIC) and NO signaling. (radioprotection.org)
  • Clinical Applications of Biological Dosimetry in Patients Exposed to Low Dose Radiation Due to Radiological, Imaging or Nuclear Medicine Procedures. (bvsalud.org)
  • This review summarized current data on the use of biological dosimetry methods in patients undergoing various medical irradiations to low doses. (bvsalud.org)
  • At low doses, biological reactions are unique and often unrelated to those that occur at high levels. (wsu.edu)
  • Simulations have suggested the possibility of extremely low-dose imaging by electron ptychography, in principle beyond that of all other electron imaging approaches to date including high-resolution TEM imaging widely used in Cryo-EM community-a potential outcome of considerable importance for the study of electron radiation-sensitive materials including biological macromolecules. (nature.com)
  • In high doses it is certainly lethal and chronic exposure is linked to the development of cancer. (scienceblog.com)
  • Today, radioactivity is used in targeted therapies for certain forms of cancer, however, the use of radiation sources for treating other diseases is not currently recognized by the medical profession. (scienceblog.com)
  • His own research suggests that radiation exposure can minimize infectious disease, reduce the incidence of cancer in the young, and substantially increase average lifespan. (scienceblog.com)
  • Typical examples of risk estimation include use of Japanese atomic bomb survivor data to estimate future risk from radiation-related cancer among American patients receiving multiple computed tomography scans, persons affected by radioactive fallout, or persons whose livelihoods involve some radiation exposure, such as x-ray technicians, interventional radiologists, or shipyard workers. (nih.gov)
  • Last week, the U.S. Preventative Services Task Force made a draft recommendation that people who are at a high risk for developing lung cancer should receive annual low-dose CT screenings. (radiationsafety.ca)
  • Cytogenetic assays appeared to be a valuable tool for individualized quantifying radiation effects in patients , with high capability for assessing genotoxicity of various medical exposure modalities and providing meaningful radiation dose estimates for prognoses of radiation -related cancer risk . (bvsalud.org)
  • For instance, the radiation may be placed in the rectum to treat rectal cancer. (cancercenter.com)
  • These implants remain in place for a set period of time depending on the cancer type, other treatments, the type of radiation source, the cancer's location and the patient's overall health status. (cancercenter.com)
  • Screening with a low-dose CT scan can identify cancer early and save your life. (nationaljewish.org)
  • The discovery of antibiotics and the rapid advent of the pharmaceutical industry, as well as the fact that it became apparent that exposure to high doses of radiation could be lethal led to the demise of this "alternative" approach to health. (scienceblog.com)
  • Evidence suggests that low dose exposure increases the number and activity of the immune system's white blood cells, boosts cytocrine and enzyme activity, and increases antibody production and so reduces the incidence of infection, assists in wound healing, and protects us from exposure to high doses of radiation. (scienceblog.com)
  • The biologically important characteristics of low-LET radiation are that its energy is carried through tissue by high-speed electrons, and that the transfers of this energy occur along paths (tracks) in extremely localized or concentrated fashion. (ratical.org)
  • By contrast, for low-LET radiations such as X-rays and beta particles, the minimal unit is the primary ionization track left by a single high-speed electron. (ratical.org)
  • The low dose of 20cGy induced significant micronucleation in cells, and inhibition of GJIC by PMA (5nM) significantly enhanced this radiation-induced micronucleation in high density cultures. (radioprotection.org)
  • In this study, inhibition of GJIC significantly enhanced low dose lethality in the high density tumour cell cultures, whereas NOS inhibition reversed this effect. (radioprotection.org)
  • In both high-income and low- and middle-income countries, lack of potable water is one of the most immediate public health problems faced after natural disasters (e.g., earthquakes, hurricanes, tsunamis), or in refugee camps. (cdc.gov)
  • Twenty-six (of 155) patients received low-dose radiation (1-20 Gy total), either as scatter from high-dose radiation or from intentional treatment of a second isocenter with low-dose radiation, were evaluated for response. (bmj.com)
  • Conclusions Low-dose radiation may increase systemic response rates of metastatic disease treated with high-dose radiation and immunotherapy. (bmj.com)
  • Meanwhile, high-precision measurement of local atomic positions is also fundamentally hindered by the poor signal-to-noise ratio of ADF images from electron-radiation sensitive or weakly scattering samples, such as monolayer 2D materials. (nature.com)
  • With high doses, the severity of the radiation effect increases beyond that of a threshold dose. (ensi.ch)
  • While the chances of survival up to a certain radiation exposure remain intact, very high doses, such as those measured on the Chernobyl site after the reactor accident, will lead to death within a very short time period. (ensi.ch)
  • At high radiological doses, the precursor cells of the cells on the intestinal villi, which cover the inside of the intestine (see figure), are affected. (ensi.ch)
  • One possible consequence of high radiation doses is acute radiation syndrome (radiation sickness). (ensi.ch)
  • Cerebral: At very high doses, the central nervous system is also damaged. (ensi.ch)
  • The ExoMars measurements cover a period of declining solar activity, corresponding to a high radiation dose. (theregister.com)
  • These radiations are produced mainly by machines when high voltage electrons interact with matter. (scirp.org)
  • Influential speakers from the U.S. Congress, the Department of Energy, and the Nuclear Energy Institute joined ANS president Steven Nesbit and ANS CEO/executive director Craig Piercy to explore key issues associated with the front end of the nuclear fuel cycle, including supply and demand for high-assay, low-enriched uranium (HALEU). (ans.org)
  • Background: The use of CTA in patients with CHD has been limited by concerns about high radiation exposure. (journalcra.com)
  • Exposure of cells with high mitotic activity to high dose radiation would result in a severe delay in mitotic activity for an extended period before the mitotic rate would return to normal. (dentalcare.com)
  • Conversely, exposure of cells with high mitotic activity to moderate doses of radiation would result in a moderate delay in the mitotic activity for a moderate period, followed by a moderate increase in mitotic activity for a short period before the mitotic rate would return to normal. (dentalcare.com)
  • Radiation protection is at a cross-road after radiation incidents and unacceptable tragedies such as those at Chernobyl and Three Mile Island. (tfljournal.org)
  • OBJECTIVE: This study aimed (1) to perform a systematic review on scanning parameters and contrast medium (CM) reduction methods used in prospectively ECG-triggered low tube voltage coronary CT angiography (CCTA), (2) to compare the achievable dose reduction and image quality, and (3) to propose appropriate scanning techniques and CM administration methods. (edu.au)
  • Advances in knowledge: The suggested appropriate scanning parameters and CM reduction methods can be used to help users in achieving diagnostic image quality with reduced radiation dose. (edu.au)
  • Prospective ECG-triggering is regarded as one of the most effective approaches for reduction of radiation dose to patients during coronary CT angiography (CCTA). (edu.au)
  • Compared with conventional atomic-resolution STEM imaging techniques, the mixed-state ptychographic approach simultaneously provides a four-times-faster acquisition, with double the information limit at the same dose, or up to a fifty-fold reduction in dose at the same resolution. (nature.com)
  • IR has recently demonstrated its capacity to reduce noise and permit dose reduction in abdominal and thoracic CT applications. (ajnr.org)
  • CTDI, 42.3) dose reduction. (ajnr.org)
  • Linear regression analysis of CNR against tube current suggests that standard CNR may be obtained until approximately 20.4% dose reduction when IR is used. (ajnr.org)
  • 4 - 9 Unfortunately, the most straightforward technique in lowering dose, notably the reduction of tube current, is associated with unacceptable increase of image noise. (ajnr.org)
  • Reduced or no "padding" during ECG-triggered coronary CT angiography results in a substantial reduction in radiation dose without affecting image quality and interpretability, according to a new study. (sciencedaily.com)
  • Padding duration can be adjusted on a patient by patient basis, and decreased padding should be considered in dose reduction strategies for patients with excellent heart rate control," said LaBounty. (sciencedaily.com)
  • The study revealed the necessity of further research , which might clarify medical radiation safety concerns for patients via using stringent biodosimetry methodology . (bvsalud.org)
  • Radiation dose indices for single-phase noncontrast head CT examinations in patients 18 years of age and younger were retrospectively reviewed between July 2011 and June 2016 using the American College of Radiology CT Dose Index Registry. (ajnr.org)
  • Results The 26 patients had a total of 83 lesions for comparison (38 receiving low-dose, 45 receiving no-dose). (bmj.com)
  • Our data show that use of minimal or no padding can result in reduced radiation dose with preserved image interpretability in examinations of patients with excellent heart rate control," he said. (sciencedaily.com)
  • Thus, using data of patients in the medical sector together with radiation exposure records will improve knowledge. (ises-europe.org)
  • It offers a quicker, more effective type of radiation treatment for some patients than traditional radiation delivered in smaller doses over a longer period of time. (cancercenter.com)
  • This type of treatment can be performed exclusively in very carefully selected patients with organ-confined prostate tumours in which fusion biopsies confirm involvement exclusively in the target lesion and with histologies of low aggressiveness (very low and low risk tumours). (cun.es)
  • Les pratiques des médecins en termes de fréquence d'utilisation des examens radiologiques routiniers et de discussion sur les risques avec leurs patients étaient aussi médiocres. (who.int)
  • The PT patients had a significantly better PFS and OS than the XRT patients (p =.025 and.035), but in multivariate analysis radiation modality was non-significant. (lu.se)
  • The method could clearly identify abnormalities typical of the illness and involves a significantly lower radiation dose than the computed tomography methods currently in use. (tum.de)
  • Luckey suggests that the medical use of small samples of partially shielded radioactive waste would provide a simple solution to radiation deficiency. (scienceblog.com)
  • Recent studies are reviewed on the consequences of the radioactive releases and on benefits of medical treatments with low doses of radiation that were carried out until the 1950s, before the radiation scare was created. (atomicinsights.com)
  • We show in this report that low-dose radiation-induced senescent stromal fibroblasts stimulate proliferation of cocultured breast carcinoma cells. (tmu.edu.tw)
  • The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are present. (cdc.gov)
  • When considering the relationship between ionising radiation and the probability of cell mutation, and thus of sickness, a distinction must be made between stochastic and deterministic effects reflecting the magnitude of the radiation dose . (ensi.ch)
  • Consequently, at low doses of radiation, it is only possible to speak of stochastic or random effects. (ensi.ch)
  • The effects of the so-called prodromal system occur between the radiation event and the onset of symptoms that are typical for the tissue concerned. (ensi.ch)
  • This is not to be mistaken with the idea that the radiation will somewhat stay in the body causing other health effects. (scirp.org)
  • Any time radiation interacts with the body, it has the potential to damage the cells in the body, possibly leading to health effects. (scirp.org)
  • IORT may help reduce side effects and the need for additional radiation treatments. (cancercenter.com)
  • There may be tremendous practical value to understanding how to neutralize or reduce the damaging (and lethal) effects of radiation on the human body. (tfljournal.org)
  • In light of the various nuclear power plant accident, military and terrorism scenarios that have entered the world consciousness over the past two generations, there is tremendous practical value to understanding how to neutralize or reduce the damaging (and lethal) effects of radiation on the body. (tfljournal.org)
  • Research on the use of plant extracts to protect against radiation exposure is not widely known, however the low toxicity and minimal side effects of many plant products are well known in both western science and traditional medicine. (tfljournal.org)
  • Radiation induced damage to the normal tissues can be partially reduced by the use of radioprotectors that reduce the damaging effects of radiation, including radiation-induced lethality (4,22,38). (tfljournal.org)
  • Recently, interest has generated in developing the potential drugs of plant origin for the amelioration of radiation effects. (tfljournal.org)
  • Dr. Jerry Cuttler has been concentrating his research on the health effects of low dose radiation for more than 15 years. (atomicinsights.com)
  • One of Dr. Cuttler's most recent efforts is titled Commentary on Fukushima and Beneficial Effects of Low Radiation . (atomicinsights.com)
  • Please help Dr. Cuttler and his colleagues referenced in the paper spread the word that there is no reason to fear the health effects of low levels of radiation. (atomicinsights.com)
  • The median volume CT dose index was 33 mGy (interquartile range = 22-47 mGy). (ajnr.org)
  • The volume CT dose index was lower in children's hospitals (median, 26 mGy) versus academic hospitals (median, 32 mGy) and community hospitals (median, 40 mGy). (ajnr.org)
  • There was a lower volume CT dose index in level I and II trauma centers (median, 27 and 32 mGy, respectively) versus nontrauma centers (median, 40 mGy) and facilities in metropolitan locations (median, 30 mGy) versus those in suburban and rural locations (median, 41 mGy). (ajnr.org)
  • Results: The median CT dose index volume (CTDIvol) was 0.45 (range 0.14-0.95 mGy ), the median dose-length product was 9 (range, 4-18 mGy*cm). (journalcra.com)
  • Their results have been used in support of the radiation hormesis hypothesis, wherein low-dose radiation may actually be beneficial for health. (wikipedia.org)
  • The following presentation follows the lead of National Council on Radiation Protection and Measurements (NCRP) Commentary 14, NCRP Report 126, and later documents in treating radiation protection from the viewpoint of quantitative uncertainty analysis. (nih.gov)
  • these are 1) direct dose measurement on a patient, 2) dose measurements in physical phantom, and 3) Monte Carlo simulations. (scirp.org)
  • Using advanced genetic imaging techniques, the researchers analyzed blood samples from 12 interventional radiologists working in six various hospitals in Slovakia and 14 controls who worked in other hospital departments without radiation exposure. (auntminnie.com)
  • We used the reported volume CT dose index stratified by patient demographics and imaging facility characteristics. (ajnr.org)
  • The volume CT dose index increased as age increased. (ajnr.org)
  • To perform a systematic review of the radiation dose and diagnostic accuracy of prospective versus retrospective ECG-gated multislice CT coronary angiography. (edu.au)
  • Concerns regarding the radiation exposure associated with coronary CTA have resulted in the development of new techniques to reduce radiation dose. (sciencedaily.com)
  • The International Centre for Low Dose Radiation Research (ICLDRR) was established at the University of Ottawa, in 1997, with national and international support. (wikipedia.org)
  • Luckey hopes to change that viewpoint and argues that more than 3000 scientific papers in the research literature point to low doses of radiation as being beneficial in human health. (scienceblog.com)
  • However, they noted that such damage from low-dose radiation in other radiology workers has been associated with malignancies in previous research. (auntminnie.com)
  • Findings from the U.S. Department of Energy's new low dose radiation research program were startling. (wsu.edu)
  • In 1998, Dr. Brooks became Chief Scientist of the U.S. Department of Energy's (DOE's) new Low Dose Radiation Research Program. (wsu.edu)
  • Antone L. Brooks , Research Professor Emeritus at Washington State University Tri-Cities, holds a Master of Radiation Ecology and a Ph.D. in Physical Biology. (wsu.edu)
  • In this research work, leakage and scattered radiations were measured from X-ray machine in the radiology department of Cape Coast Teaching hospital in the Cape Coast Municipality of Ghana. (scirp.org)
  • Radiation Research , 172 (3), 306-313. (tmu.edu.tw)
  • July 23, 2020 A CT scan technique that splits a full X-ray beam into thin beamlets can deliver the same quality of image at a much reduced radiation dose, according to a new study. (sciencedaily.com)
  • LDCT scans have a lower radiation dose than a chest X-ray or a standard CT scan. (altonmemorialhospital.org)
  • Recent-generation CT scanner technology significantly reduces radiation exposure compared with older technology. (journalcra.com)
  • In the present phase emphasis has been put on 1) Accurate determination of background dose-rate levels, 2) Experimental determination of the scattered radiation from different calibration set-ups, 3) Investigation of the inherent background and of the linearity of newly developed electronic dosemeters and dose rate meters, 4) Determination of the inherent radioactivity of the construction materials, e.g. batteries, of electronic dosemeters. (europa.eu)
  • Dr. Brooks] provides a basic understanding of our bodies' unique responses to low doses of radiation delivered at low dose rates…critical to helping decrease unnecessary public fear. (wsu.edu)
  • Measurement data obtained from experiments carried out at the Hinkley Point Nuclear Power Station in the UK with the aim of comparing the responses from different types of dose rate meters and TL dosemeters were further evaluated and analysed. (europa.eu)
  • In low-risk tumours it offers control results comparable to those described with surgical techniques with a very good safety profile, documenting very low percentages of severe urinary and/or intestinal toxicity (less than 5%) and positive rates of erectile function. (cun.es)
  • it should revert to its 1934 concept, a tolerance dose of 0.2 r/day that was based on more than 35 years of medical experience. (atomicinsights.com)
  • Water disinfection methods that can be applied in the field include use of heat, clarification, filtration, chemical disinfection, and ultraviolet radiation (UVR). (cdc.gov)
  • Excluding H-157 cells, the CER by LDFRT was inversely proportional to radioresistance [(determined by D(0), the dose to reduce survival by 67% from any point on the linear portion of the survival curve or surviving fraction (SF) at 2 Gy (SF(2))] of the cells. (duke.edu)
  • The main problem is that, as a consequence of Poisson statistics, the required illumination dose is inversely proportional to the square of the spatial resolution 7 , and thus improving spatial resolution means quadratically higher doses. (nature.com)
  • He suggests that as with many nutritional elements, such as vitamins and trace metals it is possible to become deficient in radiation. (scienceblog.com)
  • The optically stimulated luminescence (OSL) properties of the highly sensitive TL material Al(2)O(3):C were investigated at Risø in relation to environmental radiation dosimetry. (europa.eu)
  • At CIEMAT the main achievement of the project has been the demonstration of practical measurement capabilities of new hypersensitive TL materials, especially LiF:Mg,Cu,P, for environmental radiation dosimetry. (europa.eu)
  • The study further indicated that PMA induced enhancement of radiation lethality could be effected through abrogation of G2/M cell cycle checkpoint. (radioprotection.org)
  • 1 , 2 A more recent study using the American College of Radiology Dose Index Registry (DIR) reported that approximately 6% of CT scans performed in participating facilities the United States were performed on children. (ajnr.org)
  • The purpose of our study was to assess the potential benefit of IR in head CT by comparing objective and subjective image quality with standard FBP at various dose levels. (ajnr.org)
  • Dr. Cuttler and dozens of other dedicated professionals are striving to share what scientists have learned during more than 100 years of intense study of the ways that radiation affects human physiology. (atomicinsights.com)
  • In a new study , an international team of space scientists addressed the question of whether particle radiation would be too great a threat and if radiation could be mitigating through careful timing. (universetoday.com)
  • Only one-third of physicians had received a radiation protection course during their undergraduate study or in the workplace. (who.int)
  • Researchers applied advances in instrumentation and molecular biology from the Human Genome Project and developed new technologies, like the microbeam, to examine cellular response to low dose radiation. (wsu.edu)
  • As we examine what is going on at the cellular level when tissue is exposed to low-LET exposure, it will become evident that the biologically important question for settling the threshold issue is not "What human studies exist at the lowest conceivable doses? (ratical.org)