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Anesthesia 2 > 5/24 Rad Test > Flashcards

5/24 Rad Test Flashcards

1
Q

Number of x-rays traveling from the x-ray tube to the film.

A

Quantity (mA)

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2
Q

What is responsible for accelerating the electrons from the cathode to the anode?

A

kVp

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3
Q

What radiographic setting determines the quality of the x-ray beam and its ability to penetrate tissue?

A

kVp

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4
Q

The higher the kVp, the;

A

Faster electron acceleration, shorter wavelength of x-ray, more penetration, higher percentage of x-rays reach the film, lowers the mAs.

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5
Q

If the kVp is high, the mA is?

A

Low

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6
Q

What is the energy related to motion called?

A

Kinetic energy

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7
Q

What is the formula for Sante’s rule?

A

2 X thickness (cm) + 40 = kVp

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8
Q

What device is used to measure the thickness of an anatomic part, measured in cm?

A

Caliper

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9
Q

What occurs with thermionic emission and where does it occur?

A

Boiling off of electrons from filament from cathode.

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10
Q

What is the measure of the electron current to the filament which determines how many x-rays are produced?

A

mA

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11
Q

How is the mAs calculated?

A

mA X time(seconds) = mAs

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12
Q

Period of time x-rays are permitted to leave the tube?

A

Exposure time

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13
Q

What is the most common radiographic artifact in veterinary medicine?

A

Motion “Murphy’s Law”

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14
Q

What are the 4 advantages of having a high mA setting?

A

Shorter exposure times, decrease motion artifacts, allows examination of thicker anatomical areas, decreased exposure to personnel.

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15
Q

SID?

A

Source Image Distance

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16
Q

FFD?

A

Focal Film Distance

17
Q

FFD is always kept at what distance?

A

40 inches

18
Q

What is the Inverse Square Law?

A

The intensity of radiation varies inversely as the square of the distance from the source.

19
Q

X-rays follow the rules of?

A

Light

20
Q

Measurable distance between two adjacent densities.

A

Contrast

21
Q

Varying degree of blackness.

A

Density

22
Q

What is the formula for calculating new mAs with a new SID?

A

Old mAs X (new SID)^2 divided by Old SID^2 =new mAs

23
Q

Quality of beam is determined by?

A

Penetrating power (kVp)

24
Q

Quantity of the beam is determined by?

A

Number of x-rays traveling from the tube toward film over a given period of time. (mA)

25
Q

How thick does the patient have to be to be considered a table top procedure?

A

10 cm or less

26
Q

How thick does the patient have to be to be considered a film tray procedure?

A

11 cm or more

27
Q

If the SID is decreased..

A

X-ray intensity increases (darker film)

28
Q

If the SID is increased..

A

X-ray intensity decreases (lighter film)

29
Q

The source image distance..

A

Must be considered each time the control panel is set.

30
Q

One percent of the energy produced at the anode is in the form of?

A

X-rays

31
Q

The temperature of the filament within the cathode is controlled by?

A

mA setting

32
Q

Which is a characteristic of x-rays?

A

Their intensity increases as SID decreases.

33
Q

The potential difference between the anode and cathode is measured in?

A

Kilovolts

34
Q

One thousandth of an ampere, # of x-rays

A

Milliampere

35
Q

The difference source of x-rays and image receptor.

A

Source Image Distance

36
Q

Method of estimating kilovoltage in relation to thickness.

A

Sante’s Rule

37
Q

Responsible for acceleration, and electrical difference between cathode and anode.

A

Kilovoltage

38
Q

Variation in intensity of radiation as the distance from the source changes.

A

Inverse Square Law

39
Q

Multiplying milliamperage by the time.

A

mAs

Anesthesia 2 (9 decks)

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