25 notecards = 7 pages (4 cards per page)
The annual effective dose limit for individual members of the general population not occupationally exposed is ___________ for continuous or frequent exposures from artificial sources other than medical irradiation and natural background and ____________ for infrequent annual exposure.
1 mSv (0.1 rem), 5 mSv (0.5 rem)
Which part(s) of a diagnostic x-ray unit should a radiographer avoid touching while a radiographic exposure is in progress?
Tube housing, collimator, and high-tension cables
A spot film device protective curtain or sliding panel of a minimum thickness of 0.25-mm lead equivalent should normally be positioned between the fluoroscopist and the patient to intercept which of the following types of radiation?
Scattered radiation above the tabletop
Which of the following adjustments in technical exposure factors decreases the production of scattered radiation?
Increase kVp and decrease mAs in compensation
Which of the following x-ray procedures increases the radiographer’s risk of exposure to ionizing radiation?
1, 2, and 3
While standing behind the control-booth barrier, a radiographer makes a radiographic exposure. The x-rays scattered from the patient’s body should ________ behind the control-booth barrier.
scatter a minimum of two times before reaching any area
When the time spent in a higher-radiation area is reduced or limited, occupational exposure:
is also reduced
Which of the following is another term for use factor (U)?
Beam direction factor
In terms of occupational risk, radiography may be compared with the occupational risk associated with:
other industries considered reasonably safe, such as government or trade
______ is the radiation output weighted time that the unit is actually delivering radiation during the week.
Secondary radiation includes _____ radiation.
1 and 3 only
If the intensity of the x-ray beam is inversely proportional to the square of the distance from the source, how does the intensity of the x-ray beam change when the distance from the source of radiation and a measurement point is tripled?
It decreases by a factor of 9 at the new distance.
Whenever scattered radiation decreases, the radiographer’s exposure:
During which of the following x-ray examinations should a radiographer always wear a thyroid shield?
Fluoroscopy and special procedures
What is the term for the proportional amount of time during which the x-ray beam is energized or directed toward a particular barrier?
Diagnostic imaging personnel receive the highest occupational exposure during which of the following procedures?
1, 2, and 3
To ensure that the lifetime risk of occupationally exposed persons remains acceptable, the lifetime effective dose in mSv should not exceed _____ occupationally exposed person’s age in years.
If the peak energy of the x-ray beam is 100 kVp, a protective lead apron must be the equivalent of which of the following measures?
0.25-mm thickness of lead
Protective eyeglasses with optically clear lenses should contain a minimal lead equivalent protection of _____ mm.
For C-arm devices with similar fields of view, the dose rate to personnel located within a meter of the patient is _______ fluoroscopy.
comparable to that of routine
When a radiologic technologist declares her pregnancy to her employer, which of the following is appropriate?
She continues to perform her duties without interruption of employment, provided that she has received radiation safety counseling and follows established radiation safety practices.
The maximum weekly permitted equivalent dose for a controlled area must not exceed _____ microsievert (_____ mrem).
When doors to radiographic and fluoroscopic rooms are closed during radiation exposures, a substantial degree of protection is provided for persons in areas adjacent to the room door. This is because in most facilities room doors have attenuation for diagnostic energy x-ray equivalent to that provided by a _____ inch of lead.
Who should determine the exact shielding requirements for a particular imaging facility?
Because occupational exposure of the radiographer can be kept as low as reasonably achievable (ALARA) through individual monitoring and other protective measures and the use of protective devices and because exposure from radiation-related jobs will not alter the ____________, radiation workers may receive a larger equivalent dose than members of the general population.
genetically significant dose