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California Fluoroscopy Exam > Exam > Flashcards

Exam Flashcards

1
Q 
An image intensifiers photocathode causes \_\_\_\_\_ to be given off in direct proportion to the intensity of the fluorescent light:
A. Remnant Radiation
B. Electrons
C. X-Rays
D. Light Photons
A

Electrons

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2
Q 
What fluoroscopic television system device decodes the video signal into a visible image? 
A. Vidicon Camera
B. Camera Control Unit
C. Television Monitor
D. Electrons Gun
A

Television Monitor

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3
Q 
Which of the following materials are used in the construction of a fluoroscopic table? 
A. Lead
B. Aluminum 
C. Bakelite
D. Carbon Fiber
A

Aluminum
Bakelite
Carbon Fiber

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4
Q

If the entrance skin dose is measured from the surface of the tabletop, then the xray source is located _______

A

Under the table

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5
Q

The mottle level of an image can be adjusted by:
A. Changing mA
B. Changing kVp
C. Changing the exposure factors
D. Increasing the number of available xray photon

A

A, B, C, D

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6
Q 
During a fluoroscopic exam the main source of scattered radiation produced comes from \_\_\_\_\_
A. Patient
B. XRay production
C. Tabletop
D. Leakage radiation
A

Patient

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7
Q

Excessive lighting in the fluoroscopy room:
A. Helps perceive a dim image as brighter
B. Helps properly adjust the overall luminance of the TV image
C. May result in increasing the technical operating factors

A

May result in increasing the technical operating factors

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8
Q

Suitable gonad shields must be used:
A. Whenever gonads are within the useful beam
B. When it does not interfere with diagnostic imaging
C. On all potentially procreative patients
D. All times

A

When it does not interfere with diagnostic imaging

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9
Q

The exposure rate at the tabletop may not exceed five ARS per minute EXCEPT:
A. When using the ABC on large patients
B. During magnification mode
C. Where higher exposure rates are allowed

A

All of he above

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10
Q 
The ability of an image system to differentiate small objects that are closely spaced as separate objects is referred to as:
A. Differentiation
B. Resolution
C. Statistical Fluctuation 
D. Detector Contrast
A

Resolution

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11
Q

The photoconductive target in a television camera pick up tube:
A. Conducts electrons across the target
B. Allows a proportional electron charge to be generated at the particular position
C. Creates video signal

A

Allows a proportional electron charge to be generated at the particular position

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12
Q

Size of distortion is primarily caused by:
A. Focal film distance
B. Geometric factors in the shape of the image intensifier tube
C. Magification
D. Object to Distance

A

OID

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13
Q

The overall luminescence of the TV image may be properly adjusted by: (more than one)
A. Increasing room lighting
B. Adjusting the contrast control on the TV monitor
C. Adjusting the brightness control on the TV monitor

A

B and C

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14
Q

Which of the following statements is true about fluoroscopic grids?
A. Reduces scatter radiation produced in the image intensifier
B. Typical grid ration is 12:1
C. High ratio grids are preferred
D. Located between the patient and the input layer of the image intensifier

A

Located between the patient and the input layer of the image intensifier

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15
Q 
One of the most important actions a fluoro tech can take to avoid unnecessary radiation exposure to the pt is to utilize:
A. Collimation
B. Magnification
C. Primary beam filtration
D. Lead curtains
A

Collimation

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16
Q 
The increase in effective brightness due to the size reduction of the output image size is referred to as:
A. Total Gain
B. Minification gain
C. Output gain
D. Electronic gain
A

Minification gain

17
Q 
In a TV camera the proportional electron charge is converted into a proportional voltage which is sent to the:
A. Camera control unit
B. Electron gun
C. TV monitor 
D. Output phosphor
A

Camera control unit

18
Q

The greatest limiting factor concerning resolution for fluoro systems is the:
A. Output phosphor
B. Video monitor
C. Input phosphor

A

Video monitor

19
Q 
Since the Bucky tray is directly in line with the fluoroscopic gonads the opening must be automatically covered with \_\_\_\_\_ equivalent material:
A. 2.5 mm aluminum
B. 2.5 mm lead
C. .025 aluminum 
D. .025 lead
A

2.5 mm lead

20
Q 
What recent age of incident photons will emerge unaffected by the patients tissue?
A. 50%
B. 10%
C. 5%
D. 1%
21
Q

The primary purpose of protective drapes or sliding panels is to:
(More than one)
A. Reduce score to patient
B. Reduce scatter to operator
C. Reduce scatter to image intensifier
D. Reduce radiation coming timely from patient

22
Q 
The components of the closed circuit tv system are: (more than one)
A. Vidicon camera
B. Image intensifier 
C. Camera control unit
D. TV monitor

California Fluoroscopy Exam (1 decks)

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