RSAP 180 Learning Outcome #7 Review

X-ray tube filtration filters out___________.

• Low-energy electrons

• High-energy electrons

• Low-energy x-rays

• High-energy x-rays

What is the term used to describe any filtration that occurs outside of the tube and housing before the IR?

• Intrinsic filtration

• Inherent filtration

• Built in filtration

• Added filtration

What type of filter is used to even out unequal densities?

• K-edge filter

• Compensating filter

• Compound filter

• Thoraeus filter

The HVL is the amount of material required to reduce the:

• Exit thickness to one-half the intensity

• Exit intensity to one-half the thickness

• Exit intensity to one-half the original interest

• Original intensity to one-half the exit intensity

What is the standard filter material used in diagnostic radiography?

• Lead

• Pyrex

• Aluminum

• Stainless Steel

How is filtration usually expressed?

• Thickness of aluminum equivalency (Al/Eq)

• Thickness of copper equivalency (Cu/Eq)

• Thickness of Tin equivalency (Sn/Eq)

• Thickness of lead equivalency (Pb/Eq)

What is inherent filtration?

• Filtration that is located outside the glass window of the tube housing

• In contact with the patient before the image receptor

• Filtration that is a result of the composition of the tube and housing

• Filtration that is used to compensate for unequal absorption within the subject

What is a compound filter?

• A filter that uses two or more materials that complement one other in their absorbing abilities

• A filter that is used to compensate for unequal absorption within the subject

• A filter where the thicker portions of the filter are matched to the less dense parts of the body

• A filter that is In contact with the patient’s skin

TRUE OR FALSE: Compound filters place the highest-atomic-number material closest to the tube and the lowest-atomic-number material closest to the patient

• True

• False

Answer explanation

Each layer of material will absorb the characteristic photons that were created by the previous layer

All of the following are examples of added filtration EXCEPT:

• Collimator and mirrors

• Tube window

• Compound filter

• Compensating filter