Physic Chapter 15

20問 • 1年前

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通報

問題一覧

What are the prime exposure factors?

kVp, mAs, and SID

Changes in kVp affect all of the following expect _________.

number of electron boiled off the filament

An increase in MAs causes ________ in beam quality and _________ in beam intensity.

no change; an increase

There is a direct relationship between the quantity of x-rays and the ___________.

milliamperage

If MAs is increased from 20 MAs to 40 MAs, the patient dose will ________

be doubled

Beam penetrability is increased if ________ is/are increased.

kVp

A _____% increase in kVp may be accompanied by a _____% reduction in MAs to produce the same image receptor response at a slightly reduced contrast scale.

5; 30

At least ____% change in MAs is necessary to produce a visible change in the image.

Which technique would give the highest patient dose?

65 kVp/300mA @ 0.1 sec

Patient thickness should be measured with the ________.

caliper

The small focal sport will provide a ________.

finer detail of image

Beam quantity is improved when the _________ is increased, but _________ has no effect on beam quantity.

kilovoltage; milliamperage

Both beam quality and beam quantity are increased by __________.

increasing kVp and using a 3-phase generator

Added filtration has the effect of ________ the beam quality and __________ patient dose.

increasing; reducing

List the following tissues in order from the most radiolucent to the most radiopaque.

Lung, fat, muscle, bone

Which medical condition may require a lower technique?

Emphysema

When only the intensity needs to be changed, only the _______ should be adjusted.

mAs

Sharpness of detail can be improved by increasing _________.

SID

Foreshortening is caused by a(n) ______________.

angled body part when the beam is perpendicular to the image receptor.

With automatic exposure techniques the exposure is terminated when the optimum _____ is reached.

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問題一覧

What are the prime exposure factors?

kVp, mAs, and SID

Changes in kVp affect all of the following expect _________.

number of electron boiled off the filament

An increase in MAs causes ________ in beam quality and _________ in beam intensity.

no change; an increase

There is a direct relationship between the quantity of x-rays and the ___________.

milliamperage

If MAs is increased from 20 MAs to 40 MAs, the patient dose will ________

be doubled

Beam penetrability is increased if ________ is/are increased.

kVp

A _____% increase in kVp may be accompanied by a _____% reduction in MAs to produce the same image receptor response at a slightly reduced contrast scale.

5; 30

At least ____% change in MAs is necessary to produce a visible change in the image.

Which technique would give the highest patient dose?

65 kVp/300mA @ 0.1 sec

Patient thickness should be measured with the ________.

caliper

The small focal sport will provide a ________.

finer detail of image

Beam quantity is improved when the _________ is increased, but _________ has no effect on beam quantity.

kilovoltage; milliamperage

Both beam quality and beam quantity are increased by __________.

increasing kVp and using a 3-phase generator

Added filtration has the effect of ________ the beam quality and __________ patient dose.

increasing; reducing

List the following tissues in order from the most radiolucent to the most radiopaque.

Lung, fat, muscle, bone

Which medical condition may require a lower technique?

Emphysema

When only the intensity needs to be changed, only the _______ should be adjusted.

mAs

Sharpness of detail can be improved by increasing _________.

SID

Foreshortening is caused by a(n) ______________.

angled body part when the beam is perpendicular to the image receptor.

With automatic exposure techniques the exposure is terminated when the optimum _____ is reached.