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a.

Smaller than the area to be imaged

b.

As large as possible

c.

Large enough to cover the area to be imaged

d.

The same size for every part to be imaged

ANS:COBJ:Explain the importance of detector size and orientation.

TOP:Detector size

22.Which of the following has the greatest spatial resolution?

a.

Film/screen radiography

b.

Indirect digital detectors

c.

Direct digital detectors

d.

Spatial resolution is the same for all systems.

ANS:A

OBJ:Discuss factors that affect spatial resolution in cassetteless systems.

TOP:Spatial resolution

23.Excessive digital processing can lead to ______.

a.

High resolution

b.

Low noise

c.

High noise

d.

Low dose

ANS:C

OBJ:Discuss factors that affect spatial resolution in cassetteless systems.

TOP:Spatial resolution

24.Pixel pitch refers to the ______.

a.

Angle of the pixel

b.

Size of the pixel

c.

Space between pixels

d.

Tone value of pixels

ANS:C

OBJ:Discuss factors that affect spatial resolution in cassetteless systems.

TOP:Pixel and matrix size

25.The larger the matrix, the ______.

a.

Larger the image

b.

More storage space needed

c.

Both A and B

d.

Neither A nor B

ANS:C

OBJ:Discuss factors that affect spatial resolution in cassetteless systems.

TOP:Pixel and matrix size

26.More pixels always mean better resolution.

a.

True

b.

False

Copyright © 2008 by Mosby, Inc. an affiliate of Elsevier Inc.

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