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Intro Rad Protection
Terms in this set (33)
The principle active component of at thermoluminescent dosimeter is a special crystal called
The Roentgen is a unit of measurement that specifies the of x-ray in the air.
which of the following is not a basic component of a film badge?
When lead aprons are worn, a radiation monitoring device should be worn at the level of the
collar outside the apron
The amount of x-ray exposure resulting in the production of 2.58 x 10^4 Coulombs in 1 Kg of air defines the
The most sensitive type of personnel monitoring devices is the
The radiation unit derived when a rad is multiplied by the quality factor results in the unit of dose equivalency termed the
A 300 rad exposure is equivalent to a
The standard international unit of measurement of absorbed dose for all types of radiation is the
The curie is a unit used in the measurement of the quantity of
Which is a type of gonadal shielding device currently available?
Flat contact, shaped contact, and shadow
Which of the following technical factors or equipment will best reduce the gonadal dose?
use of collimation
When fluoroscopy is preformed, aprons should be worn by the operator and must have an equivalency of at least
.5 mm Pb
A diagnostic-type protective housing should reduce leakage radiation when a tube is operated at maximum potential to a level less than at a distance of 1 meter.
In the diagnostic range the least or minimum intensity of scatter occurs at an angle of to the scattering object.
Gonadal shielding should be employed if the
person has reasonable reproductive potential, gonads lie within or close to the exposure field, shielding does not interfere with the study.
The use of which device for the reduction of scattered radiation will result in increase patient exposure?
The number of repeat radiographs can be reduced by employing
effective communication skills, careful selection of technical factors, and proper immobilization techniques
The maximum permissable dose values are generally stated in terms of dose equivalents and expressed in the units of
Rem or Seivert
It is recommended that the fetus should not exceed for the entire gestation period.
The maximum permissable does to the whole body that an occupational radiation worker can receive in a one year period
5,000 mrem (50 mSv)
If tech is in room 3 ft away from source and receive 5 Roentgen. What would it be at 6ft away.
Tube housing leakage level
Bucky slot cover thickness
.25 mm pb
total filtration for machine above 70 kV
2.5 mm Al
total filtration of fluoroscope
2.5 mm Al
source to tabletop distance on stationary fluoroscope
protective curtain thickness
.25 mm pb
total filtration for machine below 50 kV
.5 mm Al
source to tabletop distance on mobile fluoroscope
total filtration for machine between 50 and 70 kV
1.5 mm Al
primary protective barrier thickness
1/16 in pb
secondary protective barrier thickness
1/32 in pb
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