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Radiographic Imaging > Chapter 32 (Module Three) > Flashcards

Chapter 32 (Module Three) Flashcards

1
Q

Mobile examinations are difficult to accomplish because
a. mobile equipment exposure techniques are dependent upon hospital power.
b. stationary equipment is more reliable.
c. exam conditions can vary widely.
d. patient beds produce image artifacts.

A

Exam conditions can vary widely

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2
Q

Mobile examinations often require
a. special adaptations of routine projections.
b. imaginative equipment manipulation.
c. innovative technical factor considerations.
d. all of the above.

A

All of the above

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3
Q

In surgery or in the emergency unit, which situation should be considered?
a. the stress of performing in a high-tension environment
b. limitations due to aseptic conditions
c. the presence of additional critical equipment
d. all of the above

A

All of the above

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4
Q

Before entering a surgical suite, who must be consulted?
a. the unit receptionist
b. the attending physician
c. the surgical technician
d. any of the above

A

The attending physician

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5
Q

When it is determined that air–fluid level demonstration is a priority, ____ projection(s) may be required for ____.
a. one; air–fluid levels
b. two; one inspiration and one expiration
c. two; one AP and one lateral projection
d. two; air–fluid levels and a normal projection of the chest

A

Two; air-fluid levels and a normal projection of the chest

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6
Q

Radiographers should move ____ away from the patient prior to making an exposure.
a. 3 feet
b. 4 feet
c. 6 feet
d. nine

A

6 feet

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7
Q

During mobile radiography, it is the radiographer’s responsibility to protect
a. the patient.
b. other health professionals.
c. the public.
d. all of the above.

A

All of the above

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8
Q

During mobile radiography, it is the radiographer’s responsibility to request that ____ leave the immediate area prior to exposure.
a. physicians
b. family members
c. health professionals
d. all of the above

A

All of the above

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9
Q

How many lead aprons should be carried to a mobile radiographic examination?
a. none; lead aprons are not necessary
b. one for the radiographer
c. one for the patient
d. two: one for the patient and one for the radiographer

A

Two: one for the patient and one for the radiographer

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10
Q

During mobile radiography, the radiographer must achieve maximum distance primarily from the
a. patient.
b. mobile unit.
c. image receptor.
d. x-ray tube.

A

Patient

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11
Q

The more advanced, full-power mobile units use ____ energy for a power supply.
a. microwave
b. battery
c. capacitor
d. alternating current

A

Battery

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12
Q

Output from battery-operated units is essentially
a. single-phase unrectified.
b. single-phase, fully rectified.
c. three-phase, 6 pulse.
d. high frequency.

A

High Frequency

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13
Q

All of the following are true of battery-powered mobile units EXCEPT:
a. Their output is a function of current supplied by the batteries.
b. They are quite popular due to their constant and predictable output.
c. Their maneuverability can be a challenge based upon their weight and size.
d. The final kVp is variable as a function of exposure time.

A

The final kVp is variable as a function of exposure time

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14
Q

During optimal mobile radiography of the chest, the recommended SID is ____ inches.
a. 72
b. 56
c. 40
d. 36

A

72

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15
Q

When performing a portable chest image on a broad-chested male patient, placing the receptor in a transverse orientation
a. requires a short axis grid.
b. can eliminate the need for a grid.
c. requires a longer SID than 72”.
d. all of the above.

A

requires a short axis grid

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16
Q

Which grid type would permit wide exposure and centering latitude and would therefore be preferred for mobile radiography?
a. 6:1
b. 8:1
c. 10:1
d. 12:1

A

6:1

17
Q

With current, state-of-the-art portable units,
a. kVp is used to compensate for insufficient mAs.
b. it is safe to stand behind the unit for protection.
c. the batteries provide power for exposures and travel.
d. higher ratio grids are necessary.

A

The batteries provide power for the exposures and travel

18
Q

For mobile radiography, radiographic grids should have a
a. high ratio and low frequency.
b. low ratio and low frequency.
c. short focal range.
d. low ratio and high frequency.

A

low ratio and high frequency

19
Q

Modern DR mobile radiographic units possess
a. a flat panel detector for image review.
b. disposable, single-use batteries.
c. a cabinet for multiple DR receptor storage.
d. remote exposure controls.

A

a flat panel detector for image review

20
Q

A common cause for repeat examinations in DR mobile radiography is due to
a. equipment reliability.
b. angulation of grids and grid-off.
c. variations in image brightness and contrast.
d. low image contrast.

A

angulation of grids and grid-off

21
Q

Batteries used in mobile radiographic machines
a. are rechargeable.
b. provide power for mobility only.
c. recharge using 220–240 V AC power.
d. all of the above.

A

are rechargeable

22
Q

If the radiographer is unable to achieve a 72” SID during mobile chest radiography, an alternative distance to use is
a. 40”.
b. 48”.
c. 56”.
d. 60”.

A

56”

23
Q

If a chest radiograph requires 4 mAs at 72”, the new mAs to use at 56” would be
a. 3 mAs.
b. 2.4 mAs.
c. 1.5 mAs.
d. 0.5 mAs.

A

2.4 mAs

24
Q

The preferred method for demonstrating air fluid levels during mobile radiography is to make sure that the
a. SID is 60”.
b. patient is sitting fully erect.
c. radiographic grid has carbon-fiber interspace material.
d. a nurse listens to the chest to indicate the air–fluid level location.

A

a nurse listens to the chest to indicate the air-fluid level location

25
Q

All of the following features are essential to a mobile radiographic unit EXCEPT
a. expandable 6-foot exposure cord.
b. automatic exposure control with single field.
c. dead-man type exposure switch.
d. clear display of exposure factors.

A

automatic exposure control with single field

26
Q

As you prepare to complete a portable chest radiograph on a patient with possible congestive heart failure, you notice several tubes and lines going into the patient. Prior to making the exposure, you should
a. adjust your kVp to penetrate the opacity of the lines.
b. ask a nurse to move the lines from the image area.
c. ask an orderly to hold the lines up and out of your exposure field.
d. remove the lines that are nonvital and complete the exam.

A

ask a nurse to move the lines from the image area

27
Q

As you complete a trauma knee exam in the ER on a MVA patient, the ER physician indicates they suspect a fracture that is not clearly visible. He/she asks you to take another image to see if there is the presence of a lipohemoarthrosis. In order to visualize this diagnostic finding, you would
a. indicate that it is not a radiology protocol and call the radiologist.
b. set up for a cross-table lateral projection of the knee, to look for fat-blood layering on the image.
c. call CT and inform that you are recommending a CT exam of the knee.
d. set up for an upright, weight-bearing knee in the ER suite at an expanded SID.

A

set up for a cross-table lateral projection of the knee, to look for fat-blood layering on the image

28
Q

When using a DR detector while performing a portable chest radiograph on a patient in the ICU
a. you must be aware of electrical shorts and shocks from the detector.
b. exposure technique charts are of little value due to the exposure latitude of the DR detector.
c. you should increase the optimum exposure by 75 percent to ensure low quantum noise.
d. you should pay particular attention to patient clothing and lines to prevent image artifacts.

A

You should pay particular attention to patient clothing and lines to prevent image artifacts

29
Q

A tethered DR detector with a portable radiographic unit
a. is wireless with no wire connection.
b. is more stable than a wireless DR detector.
c. is hard-wired to the portable for power and data transfer.
d. automatically sets the exposure factors based upon patient weight.

A

is hard-wired to the portable for power and data transfer

30
Q

Quantum noise that occurs on a portable radiographic image, is typically the result of
a. under exposure.
b. patient involuntary motion.
c. poor electrical connections due to frayed wires.
d. a grid ratio that is too low.

A

underexposure

31
Q

All of the following are true of capacitor-discharge units EXCEPT:
a. Their output is a function of large capacitors.
b. They are quite popular due to their small size and weight as well as output.
c. They function with low-power supply sources.
d. The final kVp is variable as a function of exposure time.

A

They are quite popular due to their small size and weight as well as output.

32
Q

Proper tube-grid alignment is important during _________ radiography.
a. mobile
b. stationary
c. portable
d. all of the above

A

all of the above

Radiographic Imaging (18 decks)

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