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Mobile & Fluoro > Chapter 15 > Flashcards

Chapter 15 Flashcards

1
Q

Typical power source for recharging batteries

A

110-120 volts

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2
Q

Digital receptor with electrical cord

A

Tethered detector

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3
Q

Unpopular and nearly obsolete type of generator for mobile units

A

Capacitor discharge

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4
Q

Should be repositioned after consulting a nurse or physician

A

CVP line

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5
Q

Convenient SID for mobile radiopgraphy

A

56”

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6
Q

First to develop a portable unit

A

Picker corporation

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7
Q

Preferred radiopgrahic grid characteristics for mobile radiography

A

Low ratio and high frequency

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8
Q

X-ray beam quality with current-day portable units

A

High frequency output

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9
Q

The 8 safe radiation protection practice

A
  1. Protecting yourself and patient as well as health workers
  2. Request the public and anyone else around to leave the room in order t take exposure
  3. Announce X-ray
  4. Carry two lead aprons-
  5. never place hand or any other body part in th beam
  6. provide gonadal protection for patient
  7. Achieve maximum distance from patient 6’ radius
  8. Label and handle each cassette carefully to avoid repeats
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10
Q

Give example of the minimum and maximum exposure factors from a standard mobile X-ray unit

A 
KV= 50-125
MAs= .4 - 200
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11
Q

Hand controls

A

Top left- saves the left monitor or image to disk during live or last image hold
Top right-selects regular fluoro & vascular fluoro
Bottom left-fluoro; road mapping
Bottom right-high level fluoro

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12
Q

Mechanical movements

A 
Horizontal cross arm
Wig wag
Wertical lift
L-arm rotation
Flip flop
Orbital rotation
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13
Q

Horizontal cross arm

A

Extends 8”

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14
Q

Wig wag

A

Moves side to side; range varies

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15
Q

Vertical lift

A

Two bottoms located on top of C arm max 18”

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16
Q

L-arm rotation

A

Rotates 180 degrees in either direction

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17
Q

Flip flop

A

Pivots 0-180 & 0-90 in opposite directions, increase versatility by inverting X-ray tube & image intensifier

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18
Q

Orbital rotation

A

115 degree rotation standard 90 degree of understanding & 25 degree over scan . Oblique projection

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19
Q

Magnification mode

A

Tri-mode image intensifier side 9” to 12”

9” field size 9,6 & 4 and 12” is 12,9,6

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20
Q

Pulse mode

A

Generates a preset # of X-ray pulses used in primarily as a dose reduction and reduce heat units

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21
Q

The more advanced, full-power mobile units use____ energy for a power supply

A

Battery

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22
Q

What should a technologist do if the sterile environment is violated during a surgical procedure?

A

Notify a member of the surgical team immediately

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23
Q

With current, state-of-the-art portable units,

A

The batteries provide for exposures and travel

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24
Q

All of the following features are essential to a mobile radiographic unit EXCEPT
A) expandable 6ft exposure cord
B) automatic exposure control with single field
C) dead-man type exposure switch
D)clear display of exposure factors

A

Automatic exposure control with single field

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25
Q

What is the single most effective means of radiation protection for the radiographer performing mobile exam?

A

6’ radius

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26
Q

Trauma patients require

A

Adaptation in positioning & care

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27
Q

Imobilization

A

Use on backboards,cervical collar

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28
Q

Major adaptation of ___ is required

A

CR angle & IR placement

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29
Q

Radiographic equipment

A

Rad bags, lead, Grids

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30
Q

Digital Imaging (CR & DR) provide

A

A wide exposure latitude less repeats

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31
Q

___key for trauma situations

A

Collimation and centering

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32
Q

Self propelled system has a travel speed of

A

2.5 to 3 mph

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33
Q

With what kind of incline

A

7 degree

34
Q

Driving range of up to

A

10m/hr

35
Q

__ that operate on two drive wheels

A

Dual drive motor

36
Q

Forward and reverse

A

Maneuvering close corners

37
Q

Dead mans control

A

Parking brakes are automatically engaged when the control levels are not in use

38
Q

Plugged into ___ for recharging

A

110v

39
Q

Full discharged units take up to _ recharging time

A

8hrs

40
Q

Standard power source, capacitator-discharge,non-motor driven X-ray units, no battery power,

A

Lighter in weight & usually not motor driven

41
Q

Operate on ___ power source

A

110 to 220v

42
Q

Stores electrical charges when plugged in no thendischarges electrical energy across the X-ray tube during exposure

A

Capacitor discharge system

43
Q

Both battery power and plug in electrical power for increase output

A

Dual power source

44
Q

C-arm fluoro forms a C shape with

A

X-ray tube on the bottom and intensifiers or detector on the top

45
Q

Monitor

A

Image processor or display

46
Q

Two monitors are

A

TV monitor and control cart

47
Q

The active monitor will display the lat radiograph image created until the fluoro is used and new image created

A

Last image hold

48
Q

Maneuverability

A

C arm is attached to the base that can be raised, lowered or extended
Cephalaic or caudal angle and rotated 180 degrees

49
Q

180 degree rotation is not recommended bc

A

It increases OID which lowers image resolution and highers exposure to eyes and head and neck area for surgeon or radiologist

50
Q

Common surgical procedures

A

Chalangraphy, open or closed reduction of fractures and hip pinnings

51
Q

Images are recorded in succession while contrast media is injected

A

Cine loop capability

52
Q

Pulse mode

A

Used to create X-ray beam that pulsates at timed increments to reduce exposure

53
Q

Snapshot or digital spot mode

A

Results in a higher quality

54
Q

Subtraction mode

A

Takes out bone only shows blood vessels, technique image in which the initial image is recorded during continuous fluoro

55
Q

Roadmapping

A

Geography studies

56
Q

30 degree tilt will do what to dose?

A

Increase dose by 4

57
Q

Lead apron

A

.5 mm

58
Q

Entrance exposure rate to the patient is around

A

13 R/min

59
Q

Boost can…

A

Boost exp rate for large patients

60
Q 
Before entering a surgical suite, who must be consulted?
A)the unit receptionist
B)the attending physician
C)the surgical technician
D)any of the above
A

B

61
Q 
Output from battery operated units is essentially
A)single phase unrectified
B)single phase fully rectified
C)three phase,6 pulse
D)high frequency
A

D

62
Q

Mobile examinations are difficult to accomplish bc
A)mobile equipment exposure techniques are dependent upon hospital power
B)stationary equipment is more reliable
C)exam conditions can vary widely

A

C

63
Q 
During mobile radiography, it is the radiographer a responsibility to request that\_\_\_ leave the immediate area prior to exposure
A)physicians
B)family members
C)health professionals
D)all of the above
A

D

64
Q

How should the CR be aligned for an AP projection of the chest?

A

Perpendicular to the long axis of the sternum

65
Q

A self propelled, battery driven mobile X-ray unit will generally go up a maximum incline of

A

7 degrees

66
Q

How many lead aprons should be carried to a mobile radiographic exam

A

2

67
Q

The preferred method for demostrating air fluid levels during mobile radiography is to make sure that
A)SID is 60”
B)patient is sitting fully erect
C)x Ray beam is perpendicular to the receptor
D)b & C

A

D

68
Q 
Modern mobile radiographic units possess
A) a flat pane detector for image review
B) disposable, single use battery
C) a cabinet for film cassette storage
D) remote exposure controls
A

D

69
Q

In surgery or in the emergency unit, which situation should be considered?
A)the stress of performing in a high tension environment.
B)limitations due to aseptic conditions
C)the presence of additional critical equipment
D)all of the above

A

D

70
Q

Is used to create an X-ray beam that activates at timed increments to reduce exposure during c arm fluoro

A

Pulse mode

71
Q

When it is determined that air fluid level demonstration is a priority,___ projection may be required for___>
A)one; air fluid levels
B)one; a normal projection of the chest
C) two; one AP and one lateral projection
D)two; air fluid levels and a normal projection of the chest

A

D

72
Q 
Batteries used in mobile radiographic machines
A)are rechargeable
B)provide power for mobility only
C)recharge using 220-240 V AC power
D)all of the above
A

A

73
Q

Which type of grid would permit wide exposure and centering latitude and would therefore be preferred for mobile radiography?

A

6:1

74
Q

Which one of the 3 cardinal rules of radiation protection is the most effective means of reducing exposure during mobile and surgical procedures?
A)time
B)shielding
C)distance
D)none of the above all are equally effective

A

C

75
Q 
For the mobile radiography;radiographic grids should have a 
A)high ratio and low frequency
B)low ratio and low frequency
C)cross hatched design
D)low ratio and high frequency
A

D

76
Q 
During mobile radiography, the radiographer must achieve maximum distance primarily from the 
A)patient
B)mobile patient
C)IR
D)X-ray tube
A

A

77
Q 
A common cause for repeat examinations in mobile radiography is due to 
A)equipment reliability
B)angular ion of grids and grid cutoff
C)inaccurate SID measurements
D)low Image contrast
A

C

78
Q 
Proper tube grid alignment is important during\_\_radiography.
A)mobile
B)stationary
C)portable
D)all of the above
A

D

79
Q

When taking a radiography during an ongoing surgical procedures the c arm mobile unit should be located:
A)same side of the surgical field
B)opposite site of the surgical fields
C)either of the above

A

B

80
Q

During a mobile radiographic exam a radiographer will receive the lowest amount of patient scatter by standing two meters:
A)behind the patient
B)to the side of the patient
C)in front of the patient

A

B

Mobile & Fluoro (1 decks)

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