نتایج جستجو برای: radiation dosages diagnostic x ray

تعداد نتایج: 1129911  

Journal: :iranian journal of radiation research 0
s.m.j. mortazavi school of medicine, rafsanjan university of medical sciences, rafsanjan, iran m. ghiassi-nejad m. bakhshi m. jafari-zadeh a. kavousi j. ahmadi

background: the anatomic position and proven radiosensitivity of the thyroid make it an organ of concern in dental x-ray examinations. a national radiation protection department (nrpd)-sponsored pilot study carried out in the dental radiology department of rums., to assess if the radiation dose in panoramic radiographies could be reduced without significant impairment of the subjective image qu...

Journal: :Dentistry today 2004
Dale A Miles Robert P Langlais

In short, this agency periodically assesses new technology and radiation safety practices to make recommendations about radiological procedures based on available scientific data. In reality, the recommendations are usually adopted by educational institutions and government agencies first, then become part of the end-users clinical practice. The American Dental Associations Council on Scientifi...

2016
John Lemke Edmond Sardariani Joseph Bradley Phipps Niki Patel Loretta M. Itri James Caravelli Eugene R. Viscusi

INTRODUCTION Fentanyl iontophoretic transdermal system (fentanyl ITS, IONSYS(®)) is a patient-controlled analgesia system used for the management of acute postoperative pain, designed to be utilized in a hospital setting. The objective of the two studies was to determine if fentanyl ITS could be safely used with X-rays, computerized tomography (CT) scans and radiofrequency identification (RFID)...

2018
Sung-Hee Oh Dam Kim Young Eun Lee Deog-Yoon Kim Yu Kyung Lee Joo-Hyun Lee Sang-Cheol Bae Yun Young Choi Junhee Pyo Jeonghoon Ahn Yoon-Kyoung Sung

BACKGROUND Vertebral Fracture Assessment (VFA) is a useful tool to detect the vertebral fracture (VF) with low cost and radiation exposure. We aimed to compare screening strategies including VFA and spine radiography (X-ray) for detecting VF in terms of clinical effectiveness, cost and radiation exposure. METHODS Three screening strategies: 1) X-ray following VFA, 2) VFA only, and 3) X-ray on...

Journal: :Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 2002
Xiao Ou Shu John D Potter Martha S Linet Richard K Severson Dehui Han John H Kersey Joseph P Neglia Michael E Trigg Leslie L Robison

The objective of this study was to evaluate the association between in utero diagnostic X-rays and childhood acute lymphoblastic leukemia (ALL) and the less well-studied relationship of this malignancy to preconception and postnatal diagnostic X-rays or fetal ultrasound exposures. The Children's Cancer Group conducted a case-control study including interviews with parents of 1842 ALL cases diag...

2007
A. Shabestani Monfared

The increasing use of X-rays in medical imaging has made it an important source of man-made radiation in the population collective dose (1). It is believed that about 90 percents of US community dose originates from diagnostic radiology and nuclear medicine as sources of artificial ionizing radiation (2). An important goal in radiography is to obtain the best diagnostic information by deliverin...

Journal: :international journal of pediatrics 0
akbar molaie assistant professor of pediatric cardiology,pediatric health research center, tabriz university of medical sciences,tabriz, iran. babak abdinia pdiatric health resarch center,department of pediatrics, faculty of medicine, tabriz university of medical sciences, tabriz, iran roya zakeri pediatrician, tabriz university of medical sciences, tabriz, iran. ali talei faculty of medicine, tabriz university of medical sciences, tabriz, iran

background and objective: chest x-ray is usually the first radiography performed for a newborn. this test is easily accessible and yet a basic screening method. different results have been reported in various studies regarding the diagnostic value of chest x-ray in cardiovascular disease in children. materials and methods: the study was carried out retrospectively using the medical files of 100...

2013
Eric K Ofori William K Antwi Diane N Scutt Matt Ward

Protecting the gonads of children and adults is of particular importance during diagnostic imaging of the pelvis since evidence suggests that X-rays could cause direct damage to the gonad which could result in mutation [1]. Gonad shielding during diagnostic X-ray procedures is an effective way of reducing dose to patients’ reproductive organs and reduces the risk of genetic effects in future ge...

Journal: :Cancer research 2008
Alice J Sigurdson Parveen Bhatti Dale L Preston Michele Morin Doody Diane Kampa Bruce H Alexander Dayton Petibone Lee C Yong Alan A Edwards Elaine Ron James D Tucker

The U.S. population has nearly one radiographic examination per person per year, and concern about cancer risks associated with medical radiation has increased. Radiologic technologists were surveyed to determine whether their personal cumulative exposure to diagnostic X-rays was associated with increased frequencies of chromosome translocations, an established radiation biomarker and possible ...

The measurements of electron Channeling Radiation (CR) have been performed at ELBE linear electron accelerator of the Forschungszentrum Dresden-Rossendorf. The aim of performing these experiments was to optimize radiation yield and spectral line width of CR in order to apply channeling radiation for preparing a monochromatic X-ray source. Diamond crystals can be used in relatively high electron...

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