week 9: contrast Flashcards
1
Q
what is Baxes
A
brightness attributes of an image
extent to which adjacent patches of contrast differ
2
Q
subject contrast
A
difference in signal prior to recording
e.g difference in x-ray intensities leaving tube originally
C=A-B / A
3
Q
detector contrast
A
the way in which the detector detects input information can alter the image contrast outputted
4
Q
what is digital contrast
A
input info is rescaled between 0-255.
5
Q
what is displayed contrast
A
true denotion of contrast
amount of difference seen between adjacent structures.