personnel protection Rad B&P

1.

1 point

In most fluoroscopic units the x-ray tube is located:

in table pointed up toward patient

in table pointed down toward floor

above table pointed down toward patient

above table pointed directly at radiologist

2.

1 point

Any wall in the exposure room that must stop primary radiation is considered a:

Total protective barrier

Primary protective barrier

Secondary protective barrier

Scatter protection barrier

3.

1 point

Regulations require the source to skin distance not be less than ______ on mobile fluoroscopes

30 cm

30 mm

1 meter

38 cm

4.

1 point

All x-rays other than those in the primary beam
should be blocked before they can escape the tube housing. This blocking action is accomplished by lining the inside of the tube housing with _____

Al

Pb

Ni

Ag

5.

1 point

The distance from the radiation source point to the image receptor is the:

Source-Image-Distance

Source-Table-Distance

Object-Image-Distance

Collimator-Image-Distance

6.

1 point

An on-off switch that requires continuous pressure to keep the switch ‘on’ is called a ______________ and is required for an exposure switch on fluoro machines

Reversing switch

Dead man switch

Pressure switch

Knife switch

7.

1 point

Regulations require that the total filtration in the fluoroscopic beam be at:

2.0 mm Pb/equivalent

1.0 mm Pb/equivalent

2.5 mm Al/equivalent

2.0 mm Al/equivalent

8.

1 point

Regulations require the source to skin distance (SSD) not be less than ______ on fixed fluoroscopes

1 meter

38 mm

38 cm

30 cm

9.

1 point

Regulations require that the reproducibility for a set of exposure factors may not exceed a:

2% dose change

10% dose change

5% dose change

1% dose change

10.

1 point

Regulations require that the image intensifier be coupled with the x-ray tube and electrically interlocked so that the Fluoro x-ray tube cannot be energized when the image intensifier is in the “park position”

True

False

11.

1 point

Regulations require that linearity not exceed ________ change in dose between mA stations.

1%

5%

10%

2%

12.

1 point

Regulations require that a thyroid shield have a minimum lead equivalence of:

1.0 mm Pb/equivalent

0.5 mm Pb/equivalent

2.0 mm Pb/equivalent

0.25 mm Pb/equivalent

13.

1 point

Each x-ray tube should be provided with what mechanisms to ensure proper alignment of the beam with the image receptor?

Visible Light Indicator

Detents

Color coded railings

Audible Indicator

14.

1 point

Regulation requires that the fluoro beam intensity as measured at the table top shall not exceed:

2.5 R/min/mA @ 80 kV

2.1 R/min/mA @ 80 kV

1.2 R/min/mA @ 90 kV

2.1 R/min/mA @ 100 kV

15.

1 point

A "Grave Danger Very High Radiation" sign is posted at entrance of a room where dose equivalent is in excess of:

100 Rad/hr @ 1 meter

500 Rad/hr @ 1 meter

5 mRem/hr @ 30 cm

500 mRem @ 30 cm

16.

1 point

Regardless of what device is used to indicate SID, regulations require that it be accurate to:

Within 2% of the SID

Within 1% of the SID

Within 10% of the SID

Within 5% of the SID

17.

1 point

Protective gloves should be worn whenever the hands are placed into (or very near) the primary beam, they must contain a lead equivalent of:

1.0 mm Pb/equivalent

2.0 mm Pb/equivalent

0.25 mm Pb/equivalent

0.5 mm Pb/equivalent

18.

1 point

A "caution radiation area" sign is posted at entrance of a room where dose equivalent is in excess of:

100 mRem/hr @ 30 cm

500 Rads/hr @ 1 m

100 mR/hr @ 1 m

5 mRem/hr @ 30 cm

19.

1 point

What are the factors that determine barrier design?

Patient size

Peak beam energy

TVL

Level of control

Type of radiation

Source to barrier distance

HVL

Staff occupancy

20.

1 point

Regulations require that the image intensifier cover have a:

0.5 mm Pb/equivalent

2.0 mm Al/equivalent

1.0 mm Pb/equivalent

2.0 mm Pb/equivalent

21.

1 point

It is acceptable to not include an SID indicator on the unit to indicate exposure distance as long as there is a measuring device readily available in the room.

True

False

22.

1 point

Fluoro dose to personnel is also reduced by scheduling worker rotations.

True

False

23.

1 point

Regulations require that a fluoroscopic unit have a cumulative timer that will automatically stop the exposure after:

10 minutes

5 minutes

3 minutes

7 minutes

24.

1 point

Regulations require the bucky slot cover have a minimum lead equivalent of:

1.0 mm Pb/equivalent

0.25 mm Pb/equivalent

2.0 mm Pb/equivalent

0.5 mm Pb/equivalent

25.

1 point

Federal Regulations require that the diagnostic tube housing block leakage to less than ____________________from the housing.

5 mRem/hr @ 30 cm

100 mR/hr @ 1 m

100 mR/hr @ 10 m

100 mRem/hr @ 30 cm

26.

1 point

A sign posted at the entrance of a room where radioactive materials are used and/or stored.

"Caution Radioactive Isotopes Present"

"Caution Radioactive Materials"

"Caution High Radiation"

"Caution Radiation Area"

27.

1 point

The portion of the non-useful beam that manages to escape the tube housing is called _______________

Scatter radiation

Primary beam

Leakage radiation

Tertiary radiation

28.

1 point

Types of radiation relative to barrier design include:

Primary radiation

Tertiary radiation

Environmental radiation

Secondary radiation

29.

1 point

The ability of a machine to produce the same dose using the same mAs and kVp with different mA and time combinations.

Linearity

SSD

PBL

Reproducibility

30.

1 point

The control panel of the machine must indicate the conditions of the exposure including:

Exposure index

dB used

mA

kV

Collimation size

Exposure Time

31.

1 point

All collimators must be periodically calibrated so that its shutters open to produce a light beam that superimposes the x-ray beam to:

within 5% of the SID

within 2% of the SID

within 1 % of the SID

within 10% of the SID

32.

1 point

The opening along the length of the table between the table top and the table base to permit movement of the bucky tray:

Bucky slot

Gantry

Cassette rail

Table guide

33.

1 point

An imaging modality that uses x-rays and produces images in real time and used when evaluating the dynamics (movement) of anatomical structures.

Fluoroscopy

CT

Ultrasound

MRI

34.

1 point

An audible and visible device must be present on the control to indicate to the operator when x-rays are being produced

True

False

35.

1 point

Leaded eyewear is also available and must have a minimum leaded equivalent of:

0.5 mm Pb/equivalent

1.0 mm Pb/equivalent

2.0 Pb/equivalent

0.25 mm Pb/equivalent

36.

1 point

An area with limited access for the purpose of protecting persons against undue risk from radiation exposure

37.

1 point

Any wall in the exposure room that must stop secondary or scatter radiation is considered to be a

Scatter barrier

Tertiary protective barrier

Secondary protective barrier

Primary protective barrier

38.

1 point

The ability of an x-ray machine to duplicate an exposure dose for any technique that is selected.

SSD

Reproducibility

PBL

Linearity

39.

1 point

Regulations from NCRP report 102 says leaded aprons have a minimum lead equivalent of:

0.5 mm Pb/equivalent

1.0 mm Pb equivalent

0.25 mm Pb/equivalent

2.0 mm Pb/equivalent

40.

1 point

Regulations require that the protective curtain have a minimum lead equivalent of:

1.0 mm Pb/equivalent

2.5 mm Pb/equivalent

0.25 mm Pb/equivalent

0.5 mm Pb/equivalent

41.

1 point

A "Caution High Radiation" sign is posted at entrance of a room where dose equivalent is in excess of:

100 mRem/hr @ 30 cm

500 Rad/hr @ 1 meter

5 mRem/hr @ 30 cm

100 mR/hr @ 1 meter

42.

1 point

Primary radiation shielding requires a __________ than secondary shielding.

Greater HVL

Greater TVL

Lower TVL

Lower HVL

43.

1 point

Any barrier that can stop the primary beam:

Supreme barrier

Primary barrier

Secondary barrier

Tertiary barrier

44.

1 point

When the exposure is made x-rays immediately move away from their source point in all directions. The x-rays are moving _________

Bi-tropically

Ditropically

Omnitropically

Isotropically

45.

1 point

The x-ray tube housing is mounted on a support column called a

Fypon column

Plinth

Gantry

Stylobate

46.

1 point

Even though regulations required less, protective gloves are most commonly made with a:

0.5 mm Pb/equivalent

1.5 mm Pb/equivalent

2.0 mm Pb/equivalent

1.0 mm Pb/equivalent

47.

1 point

The design in which the collimator automatically limits the primary beam to match the size of the image receptor is _____________

IR limiter

Beam Aligner

Auto-collimate

Positive Beam Limitation

48.

1 point

During fluoroscopy the primary protective barrier for the machine operator is the ________________

Image intensifier tower

Bucky slot shield

Table

Thyroid shield

49.

1 point

__________ is only those x-rays that are moving in the direction of the patient that are of any value to the imaging process

Secondary beam

Primary beam

Scatter beam

Tertiary beam

50.

1 point

Because of the length of the fluoro exposure time the beam intensity must be _______ when compared to standard radiography beam intensity

Increased

Reduced