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Results for “RADIATION PROTECTION”

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At least 1,657 records · Page 92Linked to original sources
PubMed1978

The physician's role in radiation protection.

Examinations which should not be regularly performed include: chest and lower back x-ray examinations in routine physical examinations; tuberculosis screening by chest radiography; chest x-rays for hospital admission of patients under age 40 (unless there is a clinical indication of chest disease); chest radiography in routine prenatal care, and mammographic examinations for women under age 50 who do not have symptoms or a positive history. X-ray examinations of possibly pregnant patients require appropriate measures to protect the fetus.

Adult↗
PubMed2002

Radiation protection for an ultra-high intensity laser.

Radiological characterisation of an experimental chamber and other areas of an ultra-high intensity laser facility (-terawatt) revealed significant levels of X ray, gamma and neutron radiation. Different techniques were used to detect and measure this radiation: TLD. photographic film, bubble detectors and germanium spectrometry. A test series of radiological measurements was made for 150 laser shots (300 femtoseconds) with energies in the 1 to 20 J range and a target illuminance of 10(19) W.cm2. Gamma dose equivalents in the vicinity of the chamber varied between 0.7 and 73 mSv. The dose equivalent due to the neutron component was evaluated to be 1% of the gamma dose equivalent. The amount of radiation generated depends on the laser energy and the nature of the target. No activation or contamination of the chamber or target holder were observed. Ultra-high intensity lasers are being extensively developed at the present time and the investigations performed demonstrate that it is necessary to take radiological risks into consideration in the design of ultra-high intensity laser facilities and to define personnel access conditions.

Calibration↗
PubMed1993

An alternative approach to 32P radiation protection: source shielding.

32P is the most widely used isotope in molecular biology laboratories and a high-energy beta-emitter. Local doses are often underestimated and plexiglass shielding converts some energy into penetrating gamma radiation. We describe a series of equipment that reduces local doses and gamma radiation more efficiently than traditional equipment and at the same time facilitates the handling of the isotopes.

Beta Particles↗