RADL Quiz 3

• Small FOV

• Medium FOV

• Large FOV

• Multiple FOV

These artifacts are

• Moire artefacts`

• circular or ring artifacts

• introduced artifacts

Dark bands demonstrate

• Cupping

• scatter

• beam hardening

These artifacts are

• Ring artifacts

• motion artifacts

• cupping artifacts

• Moire artifacts

when the object being imaged is smaller than the size of an individual reconstructed voxel, this can lead to

• Cupping artifacts

• beam hardening

• partial volume effects

• ring artifacts

Soft tissue contrast is excellent in

• CT

• CBCT

The CT numbers are expressed as ................................

• Hounsfield Units

• Slice thickness

• window width

• window level

windowing is

• widening the range of gray values displayed

• narrowing the range of gray values displayed

Gadolinium oxy sulphide and bismuth are detectors for

• CBCT

• CT

CT number is assigned to each .................. that represents tissue density

• pixel

• voxel