Deck 26: Digital Fluoroscopy

Question 1

The time-interval delay mode is principally used in ___________ imaging.

A) renal angiography
B) barium enema
C) cardiac
D) run-off

Answer 1

cardiac

Question 2

A principal advantage of digital fluoroscopy is the ______________.

A) dynamic range
B) image acquisition rate
C) image subtraction
D) progressive mode

Answer 2

image subtraction

Question 3

Digital fluoroscopy energy subtraction has less ___________ than temporal subtraction.

A) complexity
B) x-ray intensity
C) kVp switching
D) motion artifact

Answer 3

motion artifact

Question 4

Image integration results in _________________.

A) increased patient dose
B) decreased patient dose
C) decreased contrast resolution
D) increased noise artifact

Question 5

The time it takes to turn on the digital fluoroscopy x-ray tube and reach the selected mA and kVp is the _____________ time.

A) interrogation
B) extinction
C) radiographic
D) acquisition

Question 6

Remasking may be required due to __________________.

A) noise artifacts
B) motion artifacts
C) technical factors
D) Any of the above

Question 7

Digital fluoroscopy systems with hybrid capabilities use both _____________________________.

A) interlace and progressive modes
B) high mAs and low mass techniques
C) temporal and energy subtraction
D) charge coupled devices and TV monitors

Question 8

A charge-coupled device used in digital fluoroscopy provides high _________________.

A) spatial resolution
B) signal-to-noise ratio
C) detective quantum efficiency
D) All of the above

Question 9

Digital fluoroscopy uses at least _____ monitor(s).

A) 1
B) 2
C) 3
D) 4

Question 10

Energy subtraction technique takes advantage of the difference in ______________ during contrast injection.

A) tissue density
B) K-edge absorption
C) Compton scatter
D) patient thickness

Question 11

Digital fluoroscopic dose rate is lower than that for continuous analog fluoroscopy.

Question 12

The combination of temporal and energy subtraction techniques is called _________.

A) interlacing mode subtraction
B) hybrid subtraction
C) dual subtraction
D) superimposition

Question 13

Digital fluoroscopy with a charge-coupled device has lower _____________ and higher ______________ than conventional fluoroscopy.

A) light sensitivity, patient dose
B) patient dose, light sensitivity
C) detective quantum efficiency, maintenance
D) signal-to-noise ratio, patient dose

Question 14

Hybrid imaging can produce the highest-quality digital fluoroscopy images only if _________________.

A) remasking is employed
B) energy subtraction is used
C) patient motion is controlled
D) remasking is completed

Question 15

In mask mode, the ________ image is shown on monitor B, and the ________ image is shown on monitor A.

A) mask, subtracted
B) subtracted, mask
C) hybrid, mask
D) subtracted, hybrid