نتایج جستجو برای: nonionizing radiation
تعداد نتایج: 238378 فیلتر نتایج به سال:
Background: The spine acts as a protective mechanism and houses guards the vital fragile spinal cord. MRI has advantages of nonionizing radiation excellent visual skills, especially for soft tissues.
 Objective: To utilize to diagnose lumbar sufferers determine what's causing their low back discomfort.
 Material methodology: study was cross-sectional one conducted in Sialkot, Pakistan...
doi: 10.1289/ehp.10217 In their otherwise informative and concise review of the current state of evidence concerning risk factors for acute childhood leukemia, Belson et al. (2007) did not correctly address nonionizing radiation and, in particular, power frequency magnetic fields as a possible risk factor for childhood leukemia. This failure may be due to a widespread misconception about the ev...
doi: 10.1289/ehp.10217 In their otherwise informative and concise review of the current state of evidence concerning risk factors for acute childhood leukemia, Belson et al. (2007) did not correctly address nonionizing radiation and, in particular, power frequency magnetic fields as a possible risk factor for childhood leukemia. This failure may be due to a widespread misconception about the ev...
abstract solitary pulmonary nodule (spn) is explained as a separate, well-determined obscurity with the maximum size of 3cm which is enclosed by typical lung tissue and is not related to any other anomalies in the lung or adjacent lymph nodes. among imaging modalities mri has more benefits such as high spatial resolution and usage of nonionizing radiation, however, the efficacy of this imaging ...
The terrestrial environment is continuously exposed to electromagnetic radiations which set up a “background” electromagnetic noise. For what concerns electromagnetic waves in the Non Ionizing Radiation band (NIR), i.e. for frequencies lower than 300 GHz, the background can have a natural or an artificial origin. In the first case electromagnetic radiations have generally an atmospheric or a co...
At the present time, the research programs of the Environmental Biophysics Branch cover essentially two areas-nonionizing radiation (microwaves) and noise (auditory and nonauditory effects). Two new programs-the biological effects of light and molecular biophysics-will be started in the very near future. It is the aim of scientists working in the microwave program to develop new microwave expos...
Basic physical principles of nuclear magnetic resonance imaging (N.M.R.I), a nonionizing medical imaging technique, are described. Principles of NMRI with other conventional imaging methods, ie, isotope scanning, ultrasonography and radiography have been compared. T1 and T2 and spin density (S.D.) factors and different image construction techniques based on their different combinations is discu...
Ultrasound is a major medical imaging modality that widely used in healthcare because of advantages such as the use nonionizing radiation, ease operation, real-time from different perspectives, and low operation costs. The most common ultrasound produces two-dimensional images (2D) with 1D-array transducer. However, recent years, three-dimensional (3D US) has become increasingly relevant. There...
Unlike now widely used traditional methods of treatment of tumors by means of ionizing radiation and the chemotherapy, the method of the use of low intensity electromagnetic fields (EMF) is non-ionizing and noninvasive and hence is completely deprived of any harmful side effects. The present study was undertaken to investigate whether low-intensity EMFs can suppress tumoral cells growth in vivo...
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