Digital Radiography

Question 1

this technique is performed by digital x-ray machine with flat-panel-detectors

Answer 1

digital radiography

Question 2

what are the 2 types of detectors in digital radiography?

Answer 2

1. direct

2. indirect

Question 3

what is the only size for DR cassette?

Answer 3

14 x 17 nm

Question 4

it convert / amplifying x-ray into visible light

Answer 4

Scintillator

Question 5

uses two-step process that coverts x-ray into light, then converts that light energy into electronic signals

Answer 5

indirect detectors

Question 6

a needdle-like Cesium Iodide (CSI) structure that minimizes scatter

Answer 6

cesium iodide scintillator

Question 7

TRUE OR FALSE: each photodiode represents a pixel or picture element

Answer 7

true

Question 8

it automatically converts x-rays into electronic signals

Answer 8

direct detectors

Question 9

flat-panel detectors consist of what conductor?

Answer 9

selenium semiconductor; amorphous silicon

Question 10

TRUE OR FALSE: photons = electronic signals

Answer 10

true

Question 11

is used for image processing and storage in digital radiography

Answer 11

processing server

Question 12

is used for image reproduction in digital radiography

Answer 12

workstation monitor

Question 13

what are the functions of radiography?

Answer 13

1. image data acquisition
2. image processing
3. reproduction of image
4. storage

Question 14

what are the features of digital x-ray?

Answer 14

1. image enhancement
2. printing
3. annotation (measurements)
4. block border
5. panoramic dental package
   full leg / spine

Question 15

what are some digital image manipulation?

Answer 15

1. image pre-processing
2. scale the data to appropriate range
3. contrast enhancement- anatomy specific grayscale manipulation
4. spatial frequency enhancement
5. multiple images in one film
6. zoomed images
7. collimate image
8. lateral image
9. magnification tools
10. invert images
11. annotation
12. images can be flipped