Digital Radiography

Question 1

What occurs in digital imaging?

Answer 1

X-ray analog is changed into a voltage signal, with each charge voltage assigned a gray scale.

Question 2

What is sampling?

Answer 2

Spatial distribution of pixels.

Question 3

What are direct digital receptors? They are made up of?

Answer 3

CCD and CMOS. Silicon based.

Question 4

What are the indirect digital receptors? What is the principle behind how it works? What do you have to do with the image?

Answer 4

PSP.
Captures energy from x-ray. Releases it when simulated by another light source. This energy captured and converted to voltage.
You have to clean up the image.

Question 5

What are the benefits of CCD/CMOS? Cons?

Answer 5

Pros: 1. Direct/fast
2.High spacial resolution

Cons: 1. Cable

2. Expensive
3. Smaller surface area
4. Sensor dimentions.

Question 6

What are the pros and cons of PSP?

Answer 6

Pros: -No cable

      - Large surface area
      - Economical

Cons: -Indirect

       - Plate handling 
       - low spacial resolution

Question 7

Which has less radiation?

Answer 7

CDC or CMOS