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radiology > Personnel Protection > Flashcards

Personnel Protection Flashcards

1
Q

How far must a radiographer stand back during a mobile radiographic exposure?

a. 1 meter
b. 2 meters
c. 3 meters
d. 4 meters

A

B. 2 meters

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2
Q

Personnel monitoring devices are used for which of the following reasons?

  1. Because it is a requirement
  2. To assure workers receive less than the dose equivalent limit
  3. to check radiation safety practices

a. 1 & 2 only
b. 1 & 3 only
c. 2 & 3 only
d. 1, 2, & 3

A

d. 1, 2, & 3

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3
Q

Which of the following is the best protection from radiation?

a. Distance
b. Lead glass
c. Lead shield
d. Lead apron

A

A. Distance

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4
Q

What is the dose equivalent limit for the hands of a technologist?

a. 50 mSv
b. 250 mSv
c. 500 mSv
d. 750 mSv

A

C. 500 mSv

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5
Q

What is the dose equivalent limit for the whole body of a radiation worker?

a. 50 mSv
b. 250 mSv
c. 500 mSv
d. 750 mSV

A

A. 50 mSv

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6
Q 
Personnel monitoring is required when there is any likelihood that an individual will receive more than
\_\_\_\_\_ the dose equivalent limits
a. ½
b. 1/6
c. 1/10
d. 1/24
A

C. 1/10

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7
Q

Which of the following is a primary factor in protecting radiographers from scatter radiation?

a. Increase kVp
b. Reduce focal spot size
c. Use some type of lead shielding
d. Reduce screen speed

A

C. Use some type of lead shielding

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8
Q

Radiation workers are monitored for radiation exposure by which of the following means?

a. Chest x-ray
b. Radiation monitor
c. Complete blood count
d. Gamma camera

A

B. Radiation monitor

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9
Q

What must be the lead equivalency be for a lead apron?

a. 0.25 mm Pb
b. 0.50 mm Pb
c. 2.5 mm Pb
d. 5.0 mm Pb

A

b. 0.50 mm Pb

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10
Q

Where should a radiation monitor be worn to assure that a technologist is not receiving too much radiation?

a. On the collar
b. At the waist
c. On the finger
d. In a pocket

A

A. on the collar

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11
Q

Which of the following individuals should be asked to help hold an uncooperative child?

a. Student
b. Transporter
c. Technologist
d. Patient

A

D. Patient

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12
Q

Which of the following is a primary factor in protecting radiographers from scatter radiation?

a. Increase kVp
b. Reduce focal spot size
c. Eliminate the use of grids
d. Increase distance from patient

A

d. Increase distance from patient

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13
Q

How much is radiation exposure reduced if the distance between the patient and technologist is doubled?

a. 2 times
b. 4 times
c. 6Times
d. 8 times

A

B. 4 times

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14
Q

Which of the following definitions describes dose equivalent limits?

a. The maximum dose a body can tolerate
b. A dose that is not expected to produce significant effects
c. The dose a worker will receive/ year
d. The maximum doses a radiation monitor records.

A

b. A dose that is not expected to produce significant effects

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15
Q

What is the dose equivalent limit a radiography student may receive in one year if he/she is less than 18
years old?

a. 1 mSv
b. 5 mSv
c. 10 mSv
d. 50 mSv

A

a. 1 mSv

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16
Q

To reduce the amount of scatter radiation, which of the following should be done by the radiographer?

  1. Increase kVP and reduce mAs
  2. Utilize precise collimation
  3. Increase the OID
    a. 1 only
    b. 2 only
    c. 1 and 3 only
    d. 1, 2, & 3
A

B. 2 only

17
Q

What is the dose equivalent limit to the fetus of a pregnant radiologic technologist?

a. 0.1 mSv/ month
b. 0.5 mSv/ month
c. 1.0 mSv/ month
d. 5. 0 mSv/month

A

b. 0.5 mSv/ month

18
Q

How thick must the lead be in a primary barrier of a radiographic room?

a. 1/32 inches
b. 1/16 inches
c. 1/8 inches
d. ½ inches

A

b. 1/16 inches

19
Q

The lead equivalency for a pair of protective gloves must be at least how much?

a. 0.25 mm
b. 0.50 mm
c. 0. 75 mm
d. 1.5 mm

A

a. 0.25 mm

20
Q

During fluoroscopy, where is an acceptable position for the radiographer to stand?

a. In the room, next to the patient
b. In the room, next to the radiologist
c. In the room as far from the patient as practical
d. Holding the patient

A

c. In the room as far from the patient as practical

21
Q

Which of the following materials is the most effective as a protective barrier?

a. Lead
b. Lead glass
c. Copper
d. Aluminum

A

A. lead

22
Q

What are the dose equivalent limits a radiation worker can receive in any one quarter (13 weeks) of a year?

a. 10 mSv
b. 30 mSv
c. 50 mSv
d. 70 mSv

A

b. 30 mSv

23
Q

Primary radiation barriers in walls must be how high?

a. 5 feet
b. 7 feet
c. 9 feet
d. 11 feet

A

B. 7 feet

24
Q

Which of the following describes a primary protective barrier?

  1. A lead apron
  2. A barrier to absorb scatter radiation
  3. A barrier to absorb primary radiation

a. 1 only
b. 3 only
c. 2 & 3 only
d. 1, 2, & 3

A

b. 3 only

25
Q

The fact that distance is the best protection against radiation is proven by which of these laws?

a. Ohm’s law
b. Inverse square law
c. Coulomb/s law
d. Law of conservation of energy

A

b. Inverse square law

26
Q

Mobile protective barriers should not be used when making exposures above what kilovoltage?

a. 70 kVp
b. 90 kVp
c. 110 kVp
d. 140 kV

A

b. 90 kVp

27
Q

When referring to a whole body dose, which of the following is not included?

a. Eyes an neck
b. Hands and feet
c. Reproductive organs
d. Blood forming organs

A

b. Hands and feet

28
Q
  1. How many times should radiation scatter before reaching the control booth or a mobile protective barrier?
    a. One times
    b. Two times
    c. Three times
    d. Four times
A

b. 2 times

29
Q

Which of the following will reduce radiation exposure to personnel?

  1. Reduce time of exposure
  2. Increase distance from source of radiation
  3. Insert shielding between source of radiation and personnel

a. 1 only
b. 2 only
c. 2 & 3 only
d. 1, 2, & 3

A

d. 1, 2, & 3

30
Q

A secondary barrier protects the technologist from which of the following types of radiation?

  1. Stem radiation
  2. Primary radiation’
  3. Scatter radiation

a. 2 only
b. 3 only
c. 2 & 3 only
d. 1, 2, & 3

A

b. 3 only

31
Q

Which of the following characteristics make lead such an excellent protective barrier?

  1. High density
  2. High atomic number
  3. High absorption coefficient

a. 1 only
b. 1 & 3 only
c. 2 & 3 only
d. 1, 2, & 3

A

d. 1, 2, & 3

32
Q

What percentage of the primary exposure to the patient will reach a radiographer standing 1 meter away?

a. 0.1 %
b. 0.5 %
c. 2.5 %
d. 5.0 %

A

a. 0.1 %

33
Q

If an exposure of 16 mR is recorded at 1 meter, what would the exposure rate be at 4 meters?

a. 1 mR
b. 2 mR
c. 4 mR
d. 8 mR

A

a. 1 mR

34
Q
  1. A radiographer will receive most of his/her occupational exposure from which of these types of radiation?
    a. Primary radiation
    b. Scatter radiation
    c. Remnant radiation
    d. Gamma radiation
A

b. Scatter radiation

35
Q

What is the exposure rate if 75 mAs results in an exposure of 600 mR?

a. 6 mR/mAs
b. 8mR/mAs
c. 60 mR/mAs
d. 80 mR/mAs

A

b. 8mR/mAs

36
Q

Which of the following would never be considered as a primary barrier in normal diagnostic radiography?

a. A wall
b. The floor
c. The ceiling
d. A mobile shield

A

c. The ceiling

radiology (6 decks)

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