Image Formation

Question 1

CCD

Answer 1

charged coupled device

Question 2

TFT

Answer 2

thin film transistor

Question 3

laser

Answer 3

light amplification of stimulated emission of radiation

Question 4

is a device that creates and amplifies a narrow, intense beam of coherent light

Answer 4

laser

Question 5

is a histogram of the luminance values derived during image

Answer 5

look up table

Question 6

is used as a reference to evaluate the raw information and correct the luminance values

Answer 6

look up table

Question 7

is a directional change in the intensity or color in an image

Answer 7

image gradient

Question 8

is an attribute of visual perception in which a source appears to be radiating or reflecting light

Answer 8

brightness

Question 9

it is the perception elicited by the luminance of a visual target

Answer 9

brightness

Question 10

another type of spatial frequency filtering

Answer 10

smoothing

Question 11

also known as low pass filtering

Answer 11

smoothing

Question 12

it occurs by averaging each pixel’s frequency with surrounding pixel values to remove high frequency noise

Answer 12

smoothing

Question 13

occurs when fewer pixels in the neighborhood are included in the signal average

Answer 13

edge enhancement

Question 14

this is also known as high pass filtering and increases contrast

Answer 14

edge enhancement

Question 15

DAP

Answer 15

dose area product

Question 16

is a quantity used in assessing the radiation risk from diagnostic x-ray examinations and interventional procedures

Answer 16

dose area product

Question 17

it is defined as the absorbed dose multiplied by the area irradiated, expressed in gray-centimeters squared

Answer 17

dose area product

Question 18

the amount of light given off by the imaging plate is a result of the radiation exposure the plate has received

Answer 18

exposure indicators