Deck 8: Radiographic and Fluoroscopic Equipment

Question 1

Newer fluoroscopic system designs utilize flat-panel digital detectors for both static and dynamic imaging.Depending upon the design,the X-ray tube can be positioned above or below the patient.If the X-ray tube is above the patient during fluoroscopy,a key point to remember is that

A) the scatter radiation exposure is no different than traditional designs.
B) there is a loss of resolution due to the increased SID.
C) the scatter radiation is more intense to the operator at the waist and trunk level.
D) there is an increase in image resolution because of tighter collimation.

Answer 1

C

Question 2

The term PSP technology commonly refers to

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

Answer 2

D

Question 3

Automatic centering to the central ray

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

Answer 3

C

Question 4

Another term for automatic collimation is

A) electronic masking.
B) positive beam limitation.
C) electronic shuttering.
D) coning.

Question 5

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 6

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 7

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 8

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 9

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.

Question 10

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

A) prolonged anode preparation times.
B) repeated "boosting" of the tube several times before exposures are performed.
C) repeatedly removing and replacing the added filtration selection.
D) prolonged anode preparation times and repeated "boosting" of the tube several times before exposures are performed

Question 11

Select the true statement from the choices given.

A) Digital tomosynthesis is possible using CR technology.
B) Digital photospot images have higher image quality due to the higher radiation dose.
C) Dual-energy subtraction radiography employs PSP technology.
D) Last Image Hold (LIH)is only possible on indirect flat-panel TFT digital systems.

Question 12

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).

Question 13

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 14

Portable digital DR detectors are very popular for portable radiographic imaging.It is important to remember that

A) they must have a small electrical charge applied to the TFT layer.
B) wireless detectors use batteries for charging.
C) a communication connection must exist between the detector and X-ray generator.
D) All of the above

Question 15

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

Question 16

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

A) sensitivity specks
B) silver halide specks
C) electron traps
D) detector elements