Image production review

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55 Terms

1
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Which of the following is a major source of occupational exposure?

Compton interactions

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Which interaction does not involve the removal of an orbital electron?

Classical scattering

3
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Which interactions do not occur within the diagnostic range

Photodisintegration & Pair production

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Which interaction requires 1.02MeV of energy

pair production

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Photodisintegration: 10 mEV

6
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Which exposure would create the greates number of photoelectric interactions

72 kVP 20 mAs

decreased kvp, increased photoelectric interactions

7
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Positive contrast media is administered to increase the number of which type of interactions?

Photoelectric interactions

8
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Which intearction contributes most to image fog

Compton intearctionsT

9
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Total absorption of incident photon

Photoeletric

10
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When a kvp selected is equal or slightly greater than the inner shell binding energy of a target tissue item, which interactioin occurs most often?

Photoelectric interactions

11
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Whch of the following results in a poor quality image because of improper processing due to extreme overexposure of the IR?

Saturation

12
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Which feature provides a numeric value indicating the level of radiation exposure to the IR

EI

13
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Anatomic tissues which attenuate the xray beam equally have

low subject contrast

14
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An imaging system that can resolve 10 l/mm instead of 6 lp/mm (resolve—>resolution)

Increase spatial resolution

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The range of exposure intensities that an IR can accurately detect

Dynamic range

16
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For a given FOV a ___ matrix size will result in _____ pixels

Large, more

17
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Which of the following determines the range of grayscale available for display?

Pixel bit depth

18
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During image display, image contrast can be changed by adjusting

Window width

19
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The ability of an imaging system to distinguish between small objects that attenuate the x-ray beam similarly is

Contrast resolution

20
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the visibility of anatomic structures is increased with

Increased CNR & Increased SNR

21
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An imaging system with a higher DQE

Is more efficient in converting x-ray exposure into a quality image

22
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what type of relationship does mAs have with receptor exposure

Directly proportional

23
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as kvp is increased, the potential difference created inside the x-ray tube is

increased

24
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which of the following is a nucleon

proton and neutron

25
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what is the maxinum number of electrons allowed in the k shel

2

26
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what is the maximum number of electrons allowed in the outermost shell

8

27
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atoms that bind together because of their opposite charges form

ionic

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the number of electrons in an atom’s outermost shell is its

valence

29
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The different forms of electromagnetic radiation do not vary

in velocity

30
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the relationship between wavelength and frequency is

inversely proportional

31
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electromagnetic radiation can exists as packets or bundles of energy termed

photons

32
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what is photon energy measured in

Electron volts

33
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Removal of an orbital electron from an atom is

ionization

34
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which of the following are nonionizing forms of em radiation

infrared and radio waves

35
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which of the following does not originate from raadioactive atoms

x-rays

Gamma rays originate from a radioactive atom,

X-ray originates from a tube. ONLY DIFFERENCE ALL SIMILARITIES SIMILAR

36
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The length of time necessary for an atom to decay to half its original amount is its

half life

37
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Beta particle is comprised of an

electron

38
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Alpha particle is comprised of

2 protons and 2 neutrons

39
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X-ray tube is an example of current flow in a

vaccuum

40
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Which of the following decreases voltage by a fixed amount

transformer

41
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function of the rheostate

vary resistance

42
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which of the following allows electrons to flow only from cathode to anode

rectifiers(one way valves)

43
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The unit of measure for electrical current

ampere

44
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step up transformer

increase voltage decrease current ( HIGH POTENTIAL DIFFERENCE)

45
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Which device uses mutual induction

step down and step transformer

46
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55
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