Image Processor

Question 1

5 main aspects of image processor

Answer 1

• pre-processor
• scan converter
• post processor
• digital to analog convert

Question 2

9 examples pre-processing

Answer 2

• write magnification/write zoom
• edge enhancement
• pixel interpolation
• persistence aka frame averaging aka SNR
• 3D imaging aka volume imaging/volumetric scanning
• panoramic imaging
• spatial compounding
• fusion imaging
• elastography

Question 3

what is persistence

Answer 3

averaging of sequential frames to provide smoother image appearance/ decrease noise

Question 4

what is scan conversion

Answer 4

scan line converted into frames

Question 5

how many scan lines in a frame

Answer 5

96-256

Question 6

post processing examples (3)

Answer 6

• black/white echo inversion
• b-colour
• read magnification/ read zoom

Question 7

each frame is made up of

Answer 7

“matrix” of tiny blocks (pixels)

Question 8

what info do the pixels contain

Answer 8

brightness (amplitude/intensity)

Question 9

how many shades of gray can 1 matrix show

Answer 9

2 (on/off)

Question 10

what is a 1-bit pixel called

Answer 10

bistable

Question 11

how to determine possible number of shades of gray

Answer 11

2^ # bits

Question 12

image memory contributes to

Answer 12

contrast resolution

Question 13

contrast resolution formula

Answer 13

CR = dB/shade

Question 14

bits per pixel

Answer 14

contrast resolution

Question 15

pixels per frame

Answer 15

detail/spatial resolution

Question 16

what is 1 byte

Answer 16

8 bits

Question 17

what is 1 kilobyte

Answer 17

1024 bytes