LRA 222 week 3|Questions With Correct
Answers|Verified
Main disadvantage of three phase - ✔️Cost
Used for most stationary x-ray, CT and mammography machines - ✔️High frequency
generators
Scatter radiation is primarily the result of - ✔️Compton interaction
Two major factors that contribute to scatter radiation - ✔️Volume of tissue being
irradiated
And higher kvp
Digital IRs are more sensitive to - ✔️Lower energy levels of radiation
The unrestricted beam is - ✔️Cone shaped
Increased collimation does what to patient dose - ✔️Decrease
Decreased collimation does what to scatter radiation - ✔️Increase
Increased collimation does what to contrast - ✔️Increases
Increased collimation does what to quantum noise if MAs isn't increased - ✔️Increases
Beam restricting devices are made of - ✔️Metals that readily absorb X-rays
Flat price of lead that has a hole - ✔️Aperture diaphragms
Using an aperture results in - ✔️Images with unsharp edges
An aperture with an extended attached flange - ✔️Cone or cylinder
The best beam restricting devices - ✔️Collimators
Auto collimation is also known as - ✔️Positive beam limiting device
automatically limits the size and shape of the primary beam
to the size and shape of the RI - ✔️Auto collimator
Auto collimator will auto collimate to the size of - ✔️The IR
Answers|Verified
Main disadvantage of three phase - ✔️Cost
Used for most stationary x-ray, CT and mammography machines - ✔️High frequency
generators
Scatter radiation is primarily the result of - ✔️Compton interaction
Two major factors that contribute to scatter radiation - ✔️Volume of tissue being
irradiated
And higher kvp
Digital IRs are more sensitive to - ✔️Lower energy levels of radiation
The unrestricted beam is - ✔️Cone shaped
Increased collimation does what to patient dose - ✔️Decrease
Decreased collimation does what to scatter radiation - ✔️Increase
Increased collimation does what to contrast - ✔️Increases
Increased collimation does what to quantum noise if MAs isn't increased - ✔️Increases
Beam restricting devices are made of - ✔️Metals that readily absorb X-rays
Flat price of lead that has a hole - ✔️Aperture diaphragms
Using an aperture results in - ✔️Images with unsharp edges
An aperture with an extended attached flange - ✔️Cone or cylinder
The best beam restricting devices - ✔️Collimators
Auto collimation is also known as - ✔️Positive beam limiting device
automatically limits the size and shape of the primary beam
to the size and shape of the RI - ✔️Auto collimator
Auto collimator will auto collimate to the size of - ✔️The IR
