Ch. 22 Direct and Indirect Radiography

Which of the following could be performed when a panel has suspected damage?

• Panel flushing

• Panel autopsy

• Panel drying

• Panel cleaning

What kind of DR panels have been replaced with wireless technology and transmission to a Local Area Network?

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• Analog

• Tethered

• Digital

• Standalone

Which of the following directly converts incoming x-ray photons to an electronic digital signal?

• Flat-panel detector

• Direct DR system

• Charged-coupled device

• Electronically readable detector

Which of the following collects the electric charges produced by either direct or indirect systems as an array or matrix of pixel-size detector elements?

• Complementary metal oxide semiconductors

• Photodetectors

• Thin film transistors

• Scintillators

How are direct flat-panel detectors constructed?

• The TFT array positioned over the amorphous selenium layer

• The amorphous selenium layer positioned over the TFT array

• The complementary metal oxide semiconductor positioned over the amorphous selenium layer

• The amorphous selenium layer positioned over the complementary metal oxide semiconductor

Which of the following is not involved in the readout process?

• Detector elements

• • Data lines

• Voltage controls

• Switch lines

Which of the following emits light isotropically, which can reduce spatial resolution?

• Thin film transistors

• Complementary metal oxide semiconductors

• Scintillators

• Photodetectors

Which of the following are used by direct conversion systems?

• Amorphous selenium and thin film transistor

• Amorphous silicon and thin film transistor

• Amorphous selenium and charge-coupled device

• Amorphous silicon and charge-coupled device

Why is it necessary to routinely clean DR panels?

• To remove debris

• For routine maintenance

• To prevent the spread of infection

• To keep the image sharp

Which of the following can be inserted into DR panels to measure the amount of force a panel has encountered during usage?

• Force sensor mechanism

• Internal sensor mechanism

• Detection sensor mechanism

• External sensor mechanism