Computed and Direct radiography

Rank the tissue types in order from dark to light as they would appear on a radiograph

• AIR

• FAT

• METAL

• BONE

• WATER

The degree of blackening on the image depends on the number of x-ray photons reaching the plate, this is influenced by what three factors?

• Atomic number

• Amount of Hydrogen in the cells

• Number of free electrons in the patient

• Specific Gravity

• Thickness of tissue

Match these statements about photostimulable phosophor plates

• High intensity light applied

• Excitation

• Laser returns electron = photon released

• Stimulate

• Electrons move up a shell

• Image formation

• X-ray photons hit the PSP plate

• Erase

• Light photon read by computer diode

• Exposure

Indirect Digital Radiography uses what material to convert x-ray photons?

• Amorphus selenium

• Electroplate

• Aluminum plate
• Scintillator material

With Direct Digital Radiography, which step is skipped between x-ray photon release and image production?

• x-ray photons being absorbed by the plate

• Electrons being charged

• Conversion of electrons to light photons

• Measuring of electrons