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Rad Spring Final > Physics Unit 4 > Flashcards

Physics Unit 4 Flashcards

1
Q

What is the appropriate voltage needed for x-ray machines in the United States

A

220

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2
Q

What type of generator system allows the potential difference to drop to zero

A

Single phase

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3
Q

Which phase generator operates at 360 pulses per second

A

Multi phase

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4
Q

Supplies the tube with properly modified power, boosts voltage, sets length of exposure, activates, rotor, contains the KVP selector, contains the step up transformer, contains the rectification circuit

A

Main circuit

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5
Q

Boost amperage, surprise, filament with properly modified power, contains the step down transformer

A

Filament circuit

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6
Q

Which of the following actions initiates the rotation of the anode/rotor?

A

First 1/2 of the depression of the exposure switch

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7
Q

Which type of exposure timer utilizes ion chambers?

A

Automatic timers

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8
Q

The typical volts applied to the filament circuit after the transformer is approximately____

A

6–12 V

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9
Q

What device has major and minor settings?

A

Auto transformers

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10
Q

The MA setting on the console signifies what setting

A

The anticipated MA needed at the filament

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11
Q

A 3-phase, 6 pulse generator has an approximate voltage ripple of_____ percent

A

13–25

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12
Q

A high frequency generator has an approximate voltage ripple of_____ percent

A

3–4

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13
Q

A 3 phase, 12 pulse generator has an approximate voltage ripple of_____ percent

A

4–10

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14
Q

What type of generator are typically equivalent to battery operated units?

A

3-phase, 12 pulse

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15
Q

What MA setting does the following word generator begin?

A

The highest MA possible for the exposure

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16
Q

Which of the following is not set by the technologist when using AEC

A

Timer

17
Q

What setting is used to control detail?

A

mA

18
Q

Where are the ion Chambers located?

A

Between the patient and the IR

19
Q

The back up timer should be set at_____ of the anticipated manual exposure

A

150%

20
Q

Tomographic images are typically obtained in the____ plane

A

Coronal

21
Q

The_____ is the pivot point of the connection between the tube and the IR on a tomographic unit

A

Fulcrum

22
Q

Which of the following has movement during the exposure on a tomo unit?

A

Tube and IR

23
Q

Amplitude and thickness are_______ proportional

A

Indirectly

24
Q

Which statement is true regarding recorded detail, while using a tomo unit

A

The wider, the arc, the better the detail

25
Q

Zonography utilizes a_____

A

Small angle arc

26
Q

How many chambers are in a typical radiographic, ion chamber configuration?

A

3

27
Q

_____ is the total distance traveled by the tube during exposure phase of a tomo exposure?

A

Exposure angle

28
Q

The distance from the table top to the fulcrum is known as the_____

A

Fulcrum level

29
Q

_____ describes the total distance the tube travels when making an exposure

A

Tube shift

30
Q

Where is the area of interest located when performing tomo exams?

A

Focal plane

31
Q

What type of tomo unit allows the fulcrum to be changed while the patient is stationary

A

Adjustable fulcrum

32
Q

What should be adjusted one more blurring is needed for the object of interest

A

Exposure angle

33
Q

What is used to simulate tomo exposures?

A

Digital tomosynthesis

34
Q

What exposure angle provides the best radiographic detail

A

90°

35
Q

What happens to blur when the OID is increased?

A

Increases

36
Q

What exposure factor should be set at first when performing a tomo exam?

A

Time

37
Q

What type of mA station is set for tomogram?

A

As low as possible

38
Q

Why is tomography not utilized much anymore?

A

Other modalities like CT and MRI can obtain better, more efficient images

Rad Spring Final (9 decks)

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