Physics Chapter 9

21問 • 1年前

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通報

問題一覧

Grays, or milligrams, in air are the measurement for x-ray ____________.

quantity, exposure and intensity

The number of x-rays in the useful beam defines x-ray ___________.

Intensity

Standard x-ray machines produce about _____ uGya/mAs at 70 kVp meansrued at 100cm SID

X-ray intensity increases in direct proportion to increases in ________.

mAs

If the distance from the source to the image (SID) is reduces by half, how is the x-ray intensity at the image affected?

It is increased 4 times

If filter thickness is ______, the x-ray intensity is _________.

increased; reduced and reduced; increased

A 10% increase in kVP has ______ effect on x-ray intensity than/as a 10% increase in mAs.

much greater

If the quantity of electrons hitting the target is doubled, the x-ray intensity is __________.

increased by a factor of two

If a technologist changes the technique from 70 kVp @ 200 mAs to 70 kVp @ 400 mAs, the x-ray intensity will _______ and the optical density will _______.

double, double

The inverse square law has the same effect on x-ray ________ and x-ray _________.

intensity; exposure

An increase of 15% in kVp is equivalent to increasing mAs _______.

100%

If the intensity of a 70 kVp exposure at 20 mAs is 1.0 mGya, what would it be at 5mAs?

0.25 mGya

If an exposure is 0.5 mGya at an SID of 40 inches, what would the exposure be at an SID of 60 inches?

0.222 mGya

X-ray intensity is proportional to ______.

kVp2

The penetrability of an x-ray beam is called x-ray ________.

quality

An x-ray beam that could pass through dense tissue would have high ________.

penetrability and quality

A low-quality beam would also have low _______.

penetrability

Beam energy is affected by __________.

kVp and filtration

The half value layer (HVL) of an x-ray beam is a measuring of beam _________.

energy

Image contrast is affected by ________.

beam quality and kVp

Decreasing the kVp will increase _________.

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問題一覧

Grays, or milligrams, in air are the measurement for x-ray ____________.

quantity, exposure and intensity

The number of x-rays in the useful beam defines x-ray ___________.

Intensity

Standard x-ray machines produce about _____ uGya/mAs at 70 kVp meansrued at 100cm SID

X-ray intensity increases in direct proportion to increases in ________.

mAs

If the distance from the source to the image (SID) is reduces by half, how is the x-ray intensity at the image affected?

It is increased 4 times

If filter thickness is ______, the x-ray intensity is _________.

increased; reduced and reduced; increased

A 10% increase in kVP has ______ effect on x-ray intensity than/as a 10% increase in mAs.

much greater

If the quantity of electrons hitting the target is doubled, the x-ray intensity is __________.

increased by a factor of two

If a technologist changes the technique from 70 kVp @ 200 mAs to 70 kVp @ 400 mAs, the x-ray intensity will _______ and the optical density will _______.

double, double

The inverse square law has the same effect on x-ray ________ and x-ray _________.

intensity; exposure

An increase of 15% in kVp is equivalent to increasing mAs _______.

100%

If the intensity of a 70 kVp exposure at 20 mAs is 1.0 mGya, what would it be at 5mAs?

0.25 mGya

If an exposure is 0.5 mGya at an SID of 40 inches, what would the exposure be at an SID of 60 inches?

0.222 mGya

X-ray intensity is proportional to ______.

kVp2

The penetrability of an x-ray beam is called x-ray ________.

quality

An x-ray beam that could pass through dense tissue would have high ________.

penetrability and quality

A low-quality beam would also have low _______.

penetrability

Beam energy is affected by __________.

kVp and filtration

The half value layer (HVL) of an x-ray beam is a measuring of beam _________.

energy

Image contrast is affected by ________.

beam quality and kVp

Decreasing the kVp will increase _________.

patient pose