Deck 8: Radiographic and Fluoroscopic Equipment

Question 1

The term PSP technology commonly refers to

A)direct digital imaging.
B)indirect DR imaging.
C)photon static production technology.
D)computed radiography (CR).

Answer 1

D
Cassette-based systems use a screen-film combination or a photostimulable storage phosphor (PSP)screen in a light-tight cassette.Referred to as computed radiography (CR),the technology of PSP plates affords an economical transition toward digital imaging technology.

Question 2

A popular feature on x-ray generators that reduces repeat exposures caused by inaccurate exposure technique selection by technologists is

A)high-speed anode rotation.
B)automatic exposure control (AEC).
C)integrated anode heat unit calculation.
D)positive beam limitation (PBL).

Answer 2

B
For many procedures,exposures are terminated using automatic exposure control (AEC)circuitry.The technology of AEC has simplified exposure technique selection and improved the consistency of image quality.

Question 3

All of the following are true of CR technology EXCEPT

A)there is no difference in image resolution among the three image plate (cassette)sizes.
B)the latent image is time sensitive and should be processed in the reader in a reasonable time period.
C)CR image plates need to be erased or "washed clean" with an intense light source in the reader assembly.
D)CR technology offers an affordable electronic transition toward digital imaging.

Answer 3

A
The best spatial resolution with CR receptors is achieved with smaller receptors.The difference in resolution can be as much as 2 line pairs per millimeter (lp/mm)between cassette sizes.The difference in resolution is due the higher scanning frequency of the data with small CR plates.

Question 4

The correct combination of exposure factors necessary to yield a total of 24 mAs using the shortest exposure time to minimize patient motion is _____ mA at _____.

A)400;0.06 sec
B)500;48 ms
C)250;9 ms
D)50;0.48 sec

Question 5

In a radiographic/fluoroscopic (R/F)system,the primary barrier is considered to be the

A)fluoroscopy lead apron in front of the spot film device.
B)image intensifier or flat panel detector.
C)tabletop of the R/F table.
D)patient.

Question 6

Effective strategies to lessen fear and improve cooperation in a young child undergoing a radiographic examination of the knee would be to
1)bring the child into a darkened x-ray room.
2)lower the elevating table before bringing the child into the room.
3)preposition the x-ray tube support and table before bringing the child into the room.
4)move the overhead tube crane assembly around quickly and loudly to impress the child with your expertise.
5)preselect exposure factors to expedite the examination.
6)minimize unusual noises that are an unnecessary part of the examination.

A)1,2,4,and 5 only.
B)2,3,5,and 6 only.
C)2,4,and 5 only.
D)3,4,and 5 only.

Question 7

Portable digital DR detectors show tremendous promise for radiographers,particularly in terms of image quality and efficiency.Older versions of DR detectors used a wire cord from the detector to a computer.Newer models use ______ technology that captures the image data using radiofrequency (R/F)transmission.

A)tether
B)TFT gateway
C)wireless
D)ethernet

Question 8

You have just completed a chest radiograph on a young female patient.As you review the image,you notice she was wearing a necklace during the exposure,and it is clearly seen over the chest anatomy.Submitting this image to the radiologist for interpretation would

A)be of no consequence to the interpretation.
B)add to the diagnostic efficacy of the image because it demonstrates the patient's taste in jewelry.
C)detract from the diagnostic efficacy because it is not part of the patient's anatomy.
D)increase the diagnostic yield of information.

Question 9

Physicians can choose from several medical imaging modalities to determine their patient's condition.Among these are radiography,MRI,CT,ultrasonography,and nuclear medicine,just to mention a few.Each specialty has its own _______ of information.

A)diagnostic yield
B)interpretation cycle
C)diagnostic efficacy
D)diagnostic ratio

Question 10

A general radiographic imaging system consists of which components?
1)Control console and generator
2)X-ray tube and support assembly
3)Lead aprons and gloves
4)Left and right lead markers
5)X-ray table and upright cassette holder
6)Collimator assembly

A)3,4,5,and 7 only
B)1,2,5,and 6 only
C)1,2,3,and 4 only
D)1,2,4,and 6 only

Question 11

Chest radiographs and upright abdominal studies are conveniently performed using a(n)

A)variable-height table.
B)upright cassette holder or Bucky.
C)tilting radiographic table.
D)interventional C-arm system with a fixed SID.

Question 12

Fluoroscopy done in the surgical theater is typically accomplished with a

A)portable radiographic unit.
B)mobile radiographic unit.
C)portable C-arm system.
D)conventional R/F system.

Question 13

Medical images that are displayed on a television monitor rather than on film are referred to as _____ images.

A)latent
B)hardcopy
C)amplified
D)soft copy

Question 14

Which of the following occur during x-ray tube preparation or "boost?"
1)The collimator light goes out to save energy.
2)The anode comes up to rotational speed.
3)The preselected milliamperage increases in the cathode filament.
4)A high voltage is applied across both diodes of the x-ray tube,enabling electrons to travel across to the anode.
5)The grid in the table begins to oscillate.

A)1,2,4 and 5 only
B)2,3 and 4 only
C)2 and 3 only
D)2,4 and 5 only

Question 15

Desirable features of a modern radiographic table consist of which of the following?
1)High-attenuation tabletop material
2)Variable height
3)Four-way floating tabletop
4)Radiolucent tabletop
5)Convenient and ergonomic-friendly controls
6)Foot control of table motions

A)1,2,4,5,and 6 only
B)2,3,4,and 6 only
C)2,3,4,and 5 only
D)1,2,3,5,and 6 only

Question 16

To improve the flexibility of a radiographic system,engineers have designed equipment so that the x-ray tube support system and detector assembly

A)are always connected and centered to each other.
B)have only longitudinal motions.
C)have only transverse motions.
D)do none of the above.

Question 17

Damage to x-ray tubes that can shorten their useful life can occur with

A)unnecessarily prolonged anode preparation times.
B)repeated preparation of the tube several times before exposures are performed.
C)preselection of exposure factors before the tube is boosted.
D)both a and b.

Question 18

The latent image in computed radiography is actually _____ within the barium fluorohalide material.

A)sensitivity specks
B)silver halide specks
C)electron traps
D)all of the above

Question 19

Why is an x-ray tube glass envelope made of Pyrex glass?

A)To prevent breakage if dropped
B)To better withstand the heat produced
C)To improve the visibility of the anode for service engineers
D)For a clearer passage of the x-rays

Question 20

Radiographic exposure technique selection is performed with what component of an x-ray system?

A)Generator electronics cabinet
B)X-ray tube assembly
C)Operator's console
D)Radiographic table