Final Prep

Question 1

4 stages of digital imaging

Answer 1

Acquisition
Processing
Archiving
Presentation of the image.

Question 2

PSL

Answer 2

Photostimuable luminsence

Question 3

Whcih type of plain film radiography uses Amorpheus selineum?

Answer 3

Direct

Question 4

TFT

Answer 4

Thin film transistor

Question 5

Which system uses a photodetector TFT?

Answer 5

Indirect

Direct uses photoconductor

Question 6

What does each pixel containt

Answer 6

TFT (switch)
Storage capacitor
Sensing Area

Question 7

Which system doesnt measure the light signal?

Answer 7

Direct

it converts x-rays straight to an electrical signal

Question 8

Which System uses Amorphous silicone?

Answer 8

INDIRECT

Question 9

Which system uses Amorphous SLENEIUM?

Answer 9

DIRECT

Question 10

What does a structured phosphor (such as cesium iodide) reduce and therefore increase?

Answer 10

Reduces scatter which will improve spatial res

Question 11

how many times more efficient is structured over unstructured?

Answer 11

4 times

Question 12

What happens when light hits a photodiode

Answer 12

an electrical charge that is PROPORTIONAL to the incident light photons is created

Question 13

ratio of photodiode to detector element

Answer 13

1:1

Question 14

what does a capacitor do?

Answer 14

Store electrical signal

Question 15

What will a high detector fill factor effect?

Answer 15

Spatial and contrast.

Higher the fill factor the better

Question 16

Best DQE (detector quantum efficiency)

Answer 16

1 or 100%

No info is lost

Question 17

Is DQE dependent on energy?

Answer 17

Yes

Question 18

is low energy DQE better for indirect or direct?

Answer 18

Direct

Question 19

is high energy DQE better for indirect or direct?

Answer 19

Indirect