Image Display (CTBC-6)

Question 1

Pixel vs CT number

Answer 1

Each pixel has one CT number and displays one shade of gray

Question 2

Matrix

Answer 2

Accumulation of pixels within an image: typically 512 x 512

Question 3

Pixel Size formula

Answer 3

Pixel Size = DFOV/Matrix Size

Question 4

Smaller pixels produce the best _______ _______ and the smallest pixels are produced when using the smallest _______.

Answer 4

Spatial Resolution
DFOV

Question 5

Spatial Resolution

Answer 5

Ability of scanner to visualize small objects, spaces b/w objects, edges of objects

Question 6

Any time WW is increased _______ decreases

Answer 6

Contrast