Filtration

Question 1

The purpose of reason filtration is used is to

Answer 1

Protect the patient

Question 2

Filtration is the process of eliminating undesirable _____ energy x-ray, photons by insertion of absorbing materials into the primary beam.

Answer 2

Low

Question 3

Filtration _____ the x-ray beam.

Answer 3

Hardens

Question 4

Filtration _______ the average energy of the x-ray beam.

Answer 4

Increase

Question 5

Filtration ______ the peak energy of the x-ray beam.

Answer 5

Doesn’t affect

Question 6

Filtration _____ the x-ray beam intensity.

Answer 6

Decreases

Question 7

A filter made of more than one material is called…

Answer 7

Compound

Question 8

An x-ray machines that operate above 70 KVP the minimum amount of required filtration is

Answer 8

2.5mm aluminum equivalent

Question 9

Not only does filtration reduce patient exposure dose by eliminating low energy photos from the primary x-ray beam. It also removes a portion of the usual beam. To compensate for the loss of film density when filtration is increased, technical factors must be _____ to maintain the same radiographic density.

Answer 9

Increased

Question 10

In order to produce a uniform density radiograph of anatomy that has different thicknesses and/or different subject densities a ____ filter should be used.

Answer 10

Compensating

Question 11

The filtration that is a result of the composition of the tube and housing is called.

Answer 11

Inherit filtration

Question 12

A filter that reduces the intensity of an x-ray beam to half its initial amount is called…

Answer 12

Half value layer

Question 13

The sum of inherent and added filtration is called…

Answer 13

Total filtration

Question 14

Any filtration that occurs outside the tube and housing and before the image receptor is called…

Answer 14

Added filtration

Question 15

Which of the following can be used as a compensating filter material?

Answer 15

1) saline
2) aluminum
3) ClearPb or Plastic

Question 16

What kind of compensating filter can be used when radiographing the lungs and mediastinum?

Answer 16

Trough

Question 17

Increasing the thickness of a filter will ____ patient dose.

Answer 17

Decrease

Question 18

Filtration is the process of eliminating undesirable ____ by the insertion of absorbing materials into the primary beam.

Answer 18

Low energy x-ray photons

Question 19

Filtration permits, the radiographer to ____ the photon emission spectrum into a more useful beam.

Answer 19

Narrow

Question 20

Beam filtration does want to the patient dose?

Answer 20

It decreases patient dose.

Question 21

Beam filtration affects patient dose by

Answer 21

Removing low energy photons

Question 22

In general, low energy, x-ray photons..

Answer 22

Are absorbed by the patient

Question 23

What are considered filter media as the beam treverses towards the patient?

Answer 23

1) glass
2) dielectric oil
3) aluminum

Question 24

The most common diagnostic x-ray being filter material is

Answer 24

Aluminum

Question 25

All filtration can be expressed in terms of the thickness of ____ equivalency

Answer 25

Aluminum

Question 26

The amount of material that will reduce the intensity of the primary beam to 1/2 it’s original value is termed the

Answer 26

Half value layer

Question 27

And the half value layer is typically expressed in

Answer 27

Al/Eq

Question 28

If the half value layer is diagnostic, radiographic equipment is too low. It may be corrected by.

Answer 28

In increasing the primary beam filtration

Question 29

Which of the following is affected by half layer value?

Answer 29

Patient skin exposure

Question 30

What term describes filtration that is part of the x-ray tube the two housing and the combination device?

Answer 30

Inherent

Question 31

How many half value layers must be added to the primary beam to reduce its intensity to less than 20% of its original value?

Answer 31

3

Question 32

What filtrations would result in the lowest entrance skin exposure to the patient?

Answer 32

1.0 Al/Eq

Question 33

And mammography to the glass window and the tube is replaced with ____ to reduce patient skin exposure

Answer 33

Beryllium

Question 34

Most of the inherent filtration of a typical x-ray equipment comes from the

Answer 34

Window of the glass envelope

Question 35

A kilometer device is considered part of the ___ filtration

Answer 35

Added

Question 36

A Thoreau filter combines all the following materials, except

Answer 36

Silver

Question 37

The problem of uneven image receptor exposure to the heel effect is solved by a

Answer 37

Compensation filter

Question 38

What compensating filters is used most commonly in the radiography of femur?

Answer 38

Wedge

Question 39

The thickest portion of the wedge filter is placed over the ____ dense part of the patient.

Answer 39

Less

Question 40

Total pain filtration is equal to the sum of ___ filtration.

Answer 40

Inherent and added

Question 41

When filtration is ____, technical factors must be ____ to maintain the same density.

Answer 41

Increased; increased

Question 42

When looking to purchase an x-ray tube, output of tubes can be measured by looking at the tubes published

Answer 42

HVL

Question 43

For an x-ray beam operated at 80 KVP…

Answer 43

The HVL should be 3.8mm of Al

Question 44

For an x-ray beam operated at 90 KPP required minimum filtration must be

Answer 44

1.0mm Al/Eq inherent plus 1.5mm Al/Eq added

Question 45

A compensating wedge filter would be appropriate for

Answer 45

AP foot radiography

Question 46

The build up of tungsten deposits on the inside of an aged X-ray tube adds to the

Answer 46

Inherent filtration