lesson 3

Question 1

• A digital image is made up of a 2D array of numbers called BLANK
• a rectangular array of
  numbers, symbols, or
  expressions arranged in
  rows and columns
• the number of pixels in the images

Answer 1

matrix

Question 2

The larger the matrix, the?

Answer 2

the larger the file size of the image

Question 3

• Smallest element in a digital image
• The individual matrix boxes are known are known as

Answer 3

Pixel or Picture Element

Question 4

The larger the matrix
size, the smaller the BLANK size and the better the spatial resolution

Answer 4

pixel

Question 5

a measurement of
volume in a structure that is to be imaged

Answer 5

voxel

Question 6

• They encode the signal intensity (gray scale) of each
  pixel for the digital image
• The number of bits, or binary digits, per pixel is called the

Answer 6

bit depth

Question 7

determines the size of the area to be imaged

Answer 7

field of view (FOV)

Question 8

the imaging system’s ability
to distinguish the adjacent structures separate
from each other/ structural sharpness in
radiographic image

Answer 8

Spatial resolution

Question 9

It refers to the ability of
any imaging modality to
distinguish between differences in image intensity

Answer 9

Contrast Resolution

Question 10

• Anything that interferes with the formation of the image is considered
• defined loosely as the
  grainy appearance of the image. It limits contrast resolution

Answer 10

Noise

Question 11

It is how efficiently a system converts the xray input signal into a useful output image

Answer 11

Detective Quantum
Efficiency