Deck 9: Digital and Advanced Imaging Equipment

Question 1

The contrast ratio of a viewing monitor should be higher than

A)100.
B)170.
C)250.
D)500.

Answer 1

C

Question 2

Going from a 256 ´ 256 to a 512 ´ 512 matrix doubles an image's

A)spatial resolution.
B)pixels.
C)gray levels.
D)contrast resolution.

Answer 2

A

Question 3

Which of the following uses photostimulable phosphors?

A)Indirect conversion DR system
B)Direct conversion DR system
C)CR systems
D)Flat panel fluoroscopic systems

Answer 3

C

Question 4

CRT monitors for viewing digital images should have a luminance value higher than ____ nit.

A)100
B)170
C)1500
D)3500

Question 5

The DICOM standard does not specify an image's

A)matrix depth.
B)bit depth.
C)display settings.
D)examination time.

Question 6

Benefits of digital PACS images do not generally include

A)convenient storage.
B)image transmission.
C)computer-aided diagnosis.
D)improved spatial resolution.

Question 7

Photoconductors convert x-ray energy into

A)light energy.
B)heat energy.
C)radiofrequencies.
D)electric current.

Question 8

The limiting spatial resolution is also known as the

A)modulation transfer function.
B)Nyquist frequency.
C)fill factor.
D)detective quantum efficiency.

Question 9

Film utilized in dry laser printers uses silver _____ emulsions.

A)bromide
B)iodide
C)behenate
D)sulfide

Question 10

The most important component affecting the spatial resolution in digital subtraction angiography is the

A)focal spot size.
B)image intensifier.
C)television camera.
D)computer matrix size.