Question

Thin film transistors (TFTs) are used in direct digital radiography systems to: a)              Produce a flash...

Thin film transistors (TFTs) are used in direct digital radiography systems to:

a)              Produce a flash of light

b)             Convert the X-ray energy to an electrical charge

c)              Temporarily store the electric charge

d)             Trap the electrons in the photostimulable phosphor

e)              Bind the photostimulable phosphor to the glass screen

Homework Answers

Answer #1

answer is (b) Convert the X-ray energy to an electrical charge.

Direct-conversion detectors have an X-ray photoconductor, such as amorphous selenium, that directly converts X-

ray photons into an electric charge.

The selenium-based technology uses an amorphous selenium-coated thin-film-transistor (TFT) array to capture and

convert X-ray energy directly into digital signals. It is a direct-conversion technology that converts X-ray beams into

electric charges directly.

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