chapter 27, contrast, some 20 Flashcards
Two photographic factors allow detail to be seen
I R Exposure
Contrast
the proper name for contrast as it is displayed on for range and brightness
a) window range
b) dynamic range
b
digital processing that produce changes in contrast digital image on a monitor
window width
Difference between adjacent gray shades/image receptor exposures
contrast
With digital systems, the system look-up tables (L U T s) determines the
a) window width
b) dynamic range of image
c) contrast
b
Few shades of gray between lightest and darkest
a) low contrast
b) high contrast
b. high contrast
More shades of gray between lightest and darkest
a) low contrast
b) high contrast
a. low contrast
Short/narrow dynamic range
a) high contrast
b) low contrast
a, high contrast
the binary system consists of information recorded as
0 and 1
0 means
off
each binary number is called a
bit
an 8-bit word is called a
a) bit
b) byte
byte
a series of boxes laid out in rows and columns that gives forms to image
matrix
the individual boxes of the matrix are known as
pixels
three dimensional data point is referred to as a volume or
voxel
pixel Bit depth determines these 2 factors of the system
density and contrast
image file size is determine all except?
pixel size, ADC, matrix, bit depth
ADC
all are normal bit size except ?
2^6, 2^12, 2^16, 2^10
2^6
bit size for mammomography is which one
2^12 or 2^16
2^16, 65,536
Graphical computation of signal values of data set
histogram
difference between IDR and DDR is
direct digital Receptor use less mAs and dosage to PT
is x-ray pixel 2 or 3 dimensional ?
2 dimensional
histogram and what is used to affect the final image
LUT
standard matrix size except
3000 x 3000, 2000 x 2000, 2500 x 2500
2000 x 2000, 2500 x 2500 are correct
no 3000 x 3000
