LRA-221 Chapter 5

Question 1

define Active Matrix flat panel imagers (AMFPI)

Answer 1

• consist of a flat-panel array with an X-ray absorption material
• measures the response of these materials to X-ray absorption

Question 2

define direct conversion

Answer 2

• X-ray photons are absorbed by the coating material and immediately converted into an electrical signal.

Question 3

define field effect transistor (FET)

Answer 3

isolates each pixel element and reacts like a switch to send the electrical charges to the image processor

Question 4

define flat panel detector

Answer 4

• the materials used for detecting the X-ray signal and the sensors for recognizing that signal are permanently enclosed inside a rigid protective housing