Ch 15 Pratice Q Flashcards
Diagnostic imaging personnel receive the highest occupational exposure during which of the following procedures?
1. Fluoroscopy
2. Mobile radiography
3. Special procedures
123
To ensure that the lifetime risk of occupationally exposed persons remains acceptable, the lifetime effective dose in mSv should not exceed:
Selected Answer:
. 10 times the occupationally exposed person’s age in years.
a. 20 times the occupationally exposed person’s age in years.
b. 5 times the occupationally exposed person’s age in years.
c. the occupationally exposed person’s age in years.
10 times the occupationally exposed person’s age in years.
When a radiologic technologist declares her pregnancy to her employer, which of the following is appropriate?
a. She is able to continue her employment but is not permitted to perform any radiologic procedures during the remainder of her pregnancy.
B. She continues to perform her duties without interruption of employment, provided that she has received radiation safety counseling and follows established radiation safety practices.
c. Her employer requires her to take a leave of absence until after the completion of the first trimester of the pregnancy and then return to her normal duties.
d. Her employer terminates her employment until after her child is born.
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 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.
A.3 mSv, 7 mSv
B. 1 mSv, 5 mSv
c. 5 mSv, 9 mSv
d. 50 mSv, 25 mSv
1 mSv, 5 mSv
Secondary radiation includes:
1. leakage radiation.
2. primary radiation.
3. scatter radiation.
1 & 3
Protective eyeglasses with optically clear lenses should contain a minimal lead equivalent protection of:
a. 0.25 mm.
b. 0.35 mm.
c. 0.50 mm.
d. 0.15 mm.
0.35 mm
Which of the following x-ray procedures increases the radiographer’s risk of exposure to ionizing radiation?
1. Mobile C-arm fluoroscopy
2. Interventional procedures that use high-level-control fluoroscopy
3. Mobile radiographic examinations
123
For C-arm devices with similar fields of view, the dose rate to personnel located within a meter of the patient is:
A. comparable to that of routine fluoroscopy.
b. comparable to that of high-level-control fluoroscopy.
c. far greater than the dose rate of routine fluoroscopy.
d. significantly less than the dose rate of routine fluoroscopy.
comparable to that of routine fluoroscopy.
Which of the following adjustments in technical exposure factors decreases the production of scattered radiation?
a. Increase kVp and decrease mAs in compensation
b. Increase kVp and increase mAs
c. Decrease kVp and decrease mAs
d. Decrease kVp and increase mAs in compensation
Increase kVp and decrease mAs in compensation
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.
a. mean glandular dose
b. bone marrow dose
c. tissue tolerance dose
D. genetically significant dose
genetically significant dose
In terms of occupational risk, radiography may be compared with the occupational risk associated with which of the following?
a. A nuclear war
b. Other industries considered reasonably safe, such as government and trade
c. Extremely hazardous industries
d. A radiation accident, such as the Chernobyl nuclear power plant disaster
Other industries considered reasonably safe, such as government and trade
During which of the following x-ray examinations should a radiographer always wear a thyroid shield?
a. Fluoroscopy and special procedures
b. General diagnostic radiographic procedures performed in an x-ray room
c. Routine mobile radiographic procedures
d. Digital radiography procedures and computed radiography procedures
Fluoroscopy and special procedures
Which part(s) of a diagnostic x-ray unit should a radiographer avoid touching while a radiographic exposure is in progress?
Selected Answer:
A. Tube housing, collimator, and high-tension cables
b. Exposure switch
c. Kilovoltage control on the control panel
d. Control panel
Tube housing, collimator, and high-tension cables
While standing behind the control-booth barrier, a radiographer makes a radiographic exposure. The x-rays scattered from the patient’s body should ____________________.
A. not have enough energy remaining that will reach behind the control-booth barrier.
b. scatter only once before reaching any area behind the control-booth barrier.
c. scatter a minimum of two times before reaching any area behind the control-booth barrier.
d. scatter a minimum of 10 times before reaching any area behind the control-booth barrier.
scatter a minimum of two times before reaching any area behind the control-booth barrier.
Whenever scattered radiation decreases, the radiographer’s exposure:
decreases
