نتایج جستجو برای: radiation dosages diagnostic x ray
تعداد نتایج: 1129911 فیلتر نتایج به سال:
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...
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...
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)...
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...
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...
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...
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...
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...
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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