Distortion Ch. 29

Question 1

Distortion is also known as..

Answer 1

Magnification

Question 2

Where can inherent magnification come from?

Answer 2

beam divergence and part location (within the body)

Question 3

What is the ideal scenario to reduce magnification?

Answer 3

Largest SID & Shortest OID

Question 4

MF stands for..

Answer 4

magnification factor

Question 5

What is the calculation for MF?

Answer 5

SID / SOD = MF

Question 6

Distortion is the …

Answer 6

misrepresentation of shape and size

Question 7

Shape refers to …

Answer 7

Tube, part, IR alignment

Question 8

Tube angle or IR tilt will shape distort…

Answer 8

with elongation

Question 9

Part angle (not parallel to IR) will shape distort…

Answer 9

with foreshortening

Question 10

CR represents most..

Answer 10

accurate representation

Question 11

Shape distortion can be caused or avoided by…

Answer 11

careful alignment of the CR with the anatomical part and the IR

Question 12

Proper positioning is achieved when…

Answer 12

the CR is at right angles to the anatomical part and to the IR

Question 13

Foreshortening only occurs when..

Answer 13

there is poor alignment of the part

Question 14

Size distortion is generally a matter of…

Answer 14

magnification

Question 15

What gives the truest representation of the image?

Answer 15

part is ll to IR & CR is perpendicular to IR

Question 16

All magnification leads to a loss of

Answer 16

resolution

Question 17

Shape distortion involves…

Answer 17

elongation and foreshortening