Digital Radiography Quiz

What is the primary function of digital radiography (DR)?

• To enhance traditional x-ray techniques

• To produce analog images

• To produce digital radiographic images instantly

• To use film cassettes for image capture

Which component is used in charge-coupled device (CCD) detectors for indirect conversion?

• Amorphous selenium

• Scintillator

• Flat panel array

• Silicon substrate

What material is commonly used in the scintillator layer of an indirect flat panel detector?

• Silicon dioxide

• Polysilicon

• Cesium Iodide (CsI)

• Amorphous silicon

What is a disadvantage of flat panel detectors compared to other imaging devices?

• Short processing time

• Low geometric distortion

• Higher cost

• Higher sensitivity

What is the role of the TFT array in flat panel detectors?

• To amplify and convert analog signals to digital

• To convert x-rays to visible light

• To capture x-ray images

• To store the charge in capacitors

Which of the following is an advantage of using CCD detectors?

• Complex structure

• Higher noise levels

• Limited size

• Good spatial resolution

What happens to the electrons in a direct flat panel detector when x-rays interact with amorphous selenium?

• They are absorbed by the scintillator

• They are stored in a film plate

• They generate electron-hole pairs

• They are converted to light

What is a key feature of the charge-coupled device (CCD)?

• It has a low sensitivity to light

• It uses film for image capture

• It requires a lengthy processing time

• It is a solid-state array of light-sensitive sensor elements

Which of the following describes the image quality produced by flat panel detectors?

• Requires extensive manual processing

• High geometric distortion

• Inconsistent imaging

• Better image quality with minimal distortion

What is the primary disadvantage of flat panel detectors in low exposure situations?

• They produce high-quality images

• They require no maintenance

• They have poor low exposure performance

• They are cost-effective