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Final Exam Rad III Study Prep. > Mobile Imaging #1 > Flashcards

Mobile Imaging #1 Flashcards

1
Q

Who invented the first portable x-ray machine?

A

Frederick Jones

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2
Q

Who was a mechanical engineer who focused on coolant systems dealing with refrigeration?

A

Frederick Jones

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3
Q

Who was the first to use a portable x-ray?

A

The military in WW1; on the the field

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4
Q

Who used their own money to put portable x-ray machines in ambulances during WW1?

A

Marie Curie

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5
Q

Willhelm Conrad Roentgen invented what?

A

The first x-ray machine in Nov. 8, 1895

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6
Q

What technical controls are typically found on a mobile x-ray machine?

A

kVp and mAs

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7
Q

What is the typical range of milliampere-seconds (mAs) available on mobile x-ray machines?

A

mAs range is 0.04 to 320

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8
Q

What is the typical range of kilovolt peak (kVp) available on mobile x-ray machines?

A

kVp range is 40 to 130

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9
Q

What is the total power of units range from on a mobile x-ray machine?

A

Total power range is 15 to 25 kilowatts (kw)

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10
Q

Stationary radiography units can reach to?

A

150 kilowatts (kw)

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11
Q

Battery operated units contain what?

A

2 sets of batteries, 10 to 16, 12 volt batteries connected in a series

  1. One controls x-ray power output
  2. Other provides power for self-propelling driving
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12
Q

What is the average walking speed of a battery operated unit?

A

2.5 to 3 mph
Maximum incline is 7 degrees
When fully charged, can make 10 to 15 exposures and go 10 miles on level ground.
Takes 8 hrs to fully recharge

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13
Q

What are the advantages of Battery operated units?

A

Cordless and Constant kVp and mAS

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14
Q

Capacitor Discharge units do what?

A

Stores electrical energy and charges briefly before each exposure. Does NOT operate on batteries!

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15
Q

What are the disadvantages of Capacitor Discharge?

A

kVp drops constantly during exposure

Ex. kVp may start at 100 and drop to 80 after exposure.

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16
Q

What are the considerations of mobile x-rays?

A

Grid, Anode Heel Effect, SID

17
Q

If a grid is tilted transversely, what is the result of that?

A

Image density is lost and/or grid cutoff

18
Q

If a grid is tilted longitudinally, what is the result?

A

Image is distorted

19
Q

If the CR is directed transversely from the mid-line of a grid by more than 1 to 1 1/2 inches, then grid cutoff will result. True of False?

A

True

20
Q

Grid ratio is what?

A

6:1 or 8:1 with a focal range of 36 to 44 inches

21
Q

Anode heel effect cause what?

A

A decrease of image density under the anode side of the tube. It is more defined with Short SID, Large field size, and small anode angle.
( Thicker part at cathode and thinner at anode)

22
Q

What side of the tube has more intensity,

Cathode or Anode?

A

Cathode

23
Q

Longer SID requires what?

A

An increase in mAs to compensate for distance, mA makes for longer exposure times

24
Q

Mobile imaging produces some of the highest occupational radiation exposure for radiographers, True or False?

A

True, recommend distance is 6 feet

25
Q

What is the single most effective means of radiation protection?

A

Distance, stand at a right angle to primary beam will have the least scatter radiation

26
Q

SSD means?

A

Source to Skin Distance, cannot be less than 12 inches

27
Q

Who removes a traction device?

A

Nurse or Physicians, x-ray techs should never remove a traction device

28
Q

A true lateral decubitus (recumbent) position is with the coronal plane?

A

Vertical, with the patient elevated 2-3 inches
* Before exposure, patient needs to have been in position for at least 5mins, this is so air can rise and fluids can settle

29
Q

Florida Hospital does not include chest/abdomen as 1 view, True or False?

A

True

30
Q

Cathode placement does not apply to neonates, True or False?

A

True

31
Q

Exam for C-spine on a mobile x-ray requires what?

A

Image from right to left at 40 SID only

32
Q

For drainage secretion what are some precautions?

A

Wear gloves and place IR in a non-permeable cover (Rad Bag)

33
Q

For a mobile chest exam, if the kVp is above 90 what should you use?

A

Grid

34
Q

The infant does not need to be elevated for a dorsal decubitus position, True or False?

A

False

35
Q

Straightening the head and neck of a neonatal infant may advance the endotracheal tube too far into the trachea, True or False?

A

True

Final Exam Rad III Study Prep. (6 decks)

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