Ch. 5: Flat-Panel Array Design & Performance

Question 1

What two components does each pixel contain?

Answer 1

A sensing component and a switching component.

Question 2

What are the two types of switching components?

Answer 2

Two-contact diodes and three-contact TFTs.

Question 3

What determines the sensing component type?

Answer 3

The type of absorbing material used.

Question 4

What is a storage capacitor?

Answer 4

A sensing element in direct conversion detectors that measures charge.

Question 5

How are the pixels connected in the array?

Answer 5

Each row shares a horizontal control line; each column shares a vertical data line.

Question 6

How much wiring is typically used in a flat-panel detector?

Answer 6

About 2.5 km (1.6 miles) of electrical lines.

Question 7

What measures detector performance?

Answer 7

Spatial resolution, DQE, and contrast-detail observations.

Question 8

How do flat-panel a-Si:H detectors compare to other systems?

Answer 8

They perform better in terms of signal-to-noise ratio and DQE.