Terminology used in digital imaging

Question 1

CR reader scans IP with

Answer 1

laser

Question 2

maintains image brightness over a wide range of exposures

Answer 2

automatic rescaling

Question 3

the available gray scale of an imaging system is

Answer 3

bit depth

Question 4

smallest exposure change able to be captured by a detector

Answer 4

contrast reso

Question 5

indicator of the dose level needed to acquire an optimal image is

Answer 5

dose area product

Question 6

useful image acquisition area of an image receptor

Answer 6

is detector size

Question 7

smallest resolvable area in digital image device is

Answer 7

detector element

Question 8

alllows more anatomic structures to be captured

Answer 8

dynamic range

Question 9

range of receptor exposures that provides a quality image is

Answer 9

exposure latitude

Question 10

graphical representation of pixel values

Answer 10

histogram

Question 11

undesirable fluctuations in brightness

Answer 11

image noise

Question 12

number of pixels making up digital image is

Answer 12

matrix size

Question 13

expression of image quality provided by a detector is called

Answer 13

MFT

Question 14

highest spatial frequency

Answer 14

Nyquist frequency

Question 15

converts light into a charge

Answer 15

photodiode

Question 16

smallest area represented in digital image

Answer 16

pixel

Question 17

number of pixels in image

Answer 17

pixel density

Question 18

space fr center of pixel to center of adjacent pixel

Answer 18

pixel pitch

Question 19

assigning a value to each pixel to represent a grey tone

Answer 19

Quantization

Question 20

material that absorbs XR energy and emits part of the energy as visible light

Answer 20

scintillator

Question 21

Bit depth is equal to

Answer 21

2 to the power of number of bits