CHAPTER 2 IMAGE QUALITY

Question 1

4 PRIME EXPOSURE FACTORS

Answer 1

Time T , Milliamperage mA, Killovoltage kVp, Source to image distancing SID

Question 2

Exposure Time

Answer 2

A measure of how long the exposure will continue

Question 3

Milliamperage mA

Answer 3

A measure of the current flow rate in the xray tube circuit

Question 4

mA x TIME = mAs

Answer 4

the product of exposure and time in seconds. indicates total of radiation produced

Question 5

Killovoltage kVp

Answer 5

A measure of the potential difference across the xray tube. (Determines speed of electrons in electron stream) CONTROLS BEAM QUALITY

Question 6

SID

Answer 6

Affects xray beam intensity and beam divergence distance between source and image receptor

Question 7

Technique Charts

Answer 7

Provide recommended exposure factors for various exams and patient sizes

Question 8

Computed Radiography

Answer 8

Uses an imaging plate that contains a photostimulable phosphor

Question 9

Digital Radiography

Answer 9

No Casettes. Provides digital images

Question 10

PACS

Answer 10

Stores all xray images

Question 11

4 Image Quality Factors

Answer 11

Optical Density, Image Contrast, Image Detail, Distortion

Question 12

Optical Density

Answer 12

How dark

Question 13

Image contrast

Answer 13

How the structures look

Question 14

Image detail

Answer 14

refers to the sharpness of the image

Question 15

Distortion

Answer 15

refers to a variation in size or shape of the image in comparision

Question 16

If you Increase the SID

Answer 16

It Increase Magnification

Question 17

Decrease OID

Answer 17

Decrease Magnification

Question 18

Explain the significance of exposure time

Answer 18

A decrease in exposure time will result in less radiation and a lighter image

Question 19

3 digital pitfalls

Answer 19

Overexposure, Underexposure, Poor positioning

Question 20

True or False. An xray marker should be used taking any photograph

Answer 20

TRUE