lesson 3 Flashcards
- 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
matrix
The larger the matrix, the?
the larger the file size of the image
- Smallest element in a digital image
- The individual matrix boxes are known are known as
Pixel or Picture Element
The larger the matrix
size, the smaller the BLANK size and the better the spatial resolution
pixel
a measurement of
volume in a structure that is to be imaged
voxel
- 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
bit depth
determines the size of the area to be imaged
field of view (FOV)
the imaging system’s ability
to distinguish the adjacent structures separate
from each other/ structural sharpness in
radiographic image
Spatial resolution
It refers to the ability of
any imaging modality to
distinguish between differences in image intensity
Contrast Resolution
- Anything that interferes with the formation of the image is considered
- defined loosely as the
grainy appearance of the image. It limits contrast resolution
Noise
It is how efficiently a system converts the xray input signal into a useful output image
Detective Quantum
Efficiency