Self Test: Part E

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created 6 years ago by Erin_Cook_Phillips
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1

Each digital image is formed by two-dimensional elements termed:

pixels

2

Highly complex mathematical formulas used in creating the digital image are termed:

Algorithms

3

True/False:

Changes in kV have little impact on patient dose with digital imaging.

False

4

True/False:

kV and mAs do not have the same direct effect on image quality with digital imaging as they do with IR screen imaging.

True

5

True/False:

A wide exposure latitude associated with digital imaging systems will reduce repeat exposures.

True

6

The intensity of light that represents the individual pixels in the image on the monitor is termed:

Brightness

7

The primary controlling factor of contrast in the digital film image is:

processing algorithms

8

The greater the bit depth of a digital system, the greater the:

contrast resolution

9

What term describes the minimum pixel size that can be displayed by a monitor?

Display pixel size

10

True/False:

OID and SID have little impact on spatial resolution of the digital image.

False

11

True/False:

The current range of spatial resolution for digital general radiographic imaging is between 2.5 to 5 lp/mm.

True

12

A numeric value that is representative of the exposure the image receptor received is termed:

Exposure Indicator

13

Random disturbance that obscures or reduces clarity is:

noise

14

True/False:

If an acceptable exposure indicator range is between 2.0 and 2.4, an exposure indicator of 4.0 would indicate overexposure.

True

15

True/False:

A high SNR results when insufficient mAs is used in creating a digital image.

False

16

Which of the following factors will result in an increase in noise?

excessive mAs

scatter radiation

high kV

decrease in pixel size

scatter radiation

17

Changing or enhancing the electronic image to improve its diagnostic quality describes:

post processing

18

__________ is the application of specific image processing that alters the pixel values across the image so as to present a more uniform image appearance.

Equalization

19

Window width controls the ________ of the digital image

contrast

20

True/False:

Post-processing can correct for a low SNR image.

False