Deck 26: Digital Fluoroscopy

Question 1

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

Answer 1

K-edge absorption

Question 2

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

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

Answer 2

cardiac

Question 3

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

Answer 3

True

Question 4

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 5

A principal advantage of digital fluoroscopy is the _____.

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

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 energy subtraction has less _____ than temporal subtraction.

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

Question 8

Image integration results in _____.

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

Question 9

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 10

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

Question 11

Digital fluoroscopy uses at least _____ monitor(s).

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

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

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 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

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