Penguins for exam 3 Flashcards

1
Q

____ determines quality of the x-ray beam

A

kVP

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2
Q

Most exposure timers are ____ and are controlled by a ____

A
  1. Electronic

2. Microprocessor

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3
Q

____ is the process of converting AC to DC

A

Rectification

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4
Q

_____ controls screen film radiographic contrast

A

kVp

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5
Q

An increase in kVp will results in ____ Quantity, ___ Qauluty

A

Increase in both

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6
Q

An increase in mA will result in ____ Quantity , ___ Quality

A
  1. Increase Quantity

2. No change in Quality

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7
Q

An increase in Exposure time will ____ Quantity, ___ Quality

A
  1. Increase Quantity

2. No change Quality

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8
Q

An increase in mAs will ____ Quantity, ___ Quality

A
  1. Increase Quantity

2. No change Quality

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9
Q

An increase in Distance will ____ Quantity, ___ Quality

A
  1. Decrease Quantity

2. No change Quality

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10
Q

An increase in filtration will ____ Quantity, ___ Quality

A
  1. Decrease Quantity

2. Increase Quality

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11
Q

with constant exposure time ____ controls the x-ray quantity and therefore pt. radiation dose

A

mA

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12
Q

____ controls OD

A

mAs

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13
Q

Define QA

A

Quality management that focuses on the person rather than the process

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14
Q

Define QC

A

Subdivision of QM that focuses on the equipment function

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15
Q

Define noise

A

Grainy or uneven appearance of an image caused by insufficient number of xrays

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16
Q

Define resolution

A

Measure of the ability of the system to image 2 separate objects and visually distinguish one from the other

17
Q

Define speed

A

Sensitivity of film to x-rays

Influences: Resolution and noise

18
Q

Term for “Fidelity with which the anatomical structure that is being imaged is rendered on the radiograph

A

Image Quality

19
Q

List the 3 characteristics of image quality

A
  1. Spatial resolution
  2. Contrast resolution
  3. Noise
20
Q

____ is the random fluctuations in OD of the image

A

Noise

21
Q

The relationship between OD and radiation exposure is called ____

A
Characteristic curve
Ranges from (.25-2.5)
22
Q

What are the geometric factors that affect image quality

A
  1. Magnification
  2. Distortion
  3. Focal Spot blur
23
Q

Name the subject factors that affect image quality

A
  1. Subject contrast
  2. Pt. thickness
  3. Tissue mass density
  4. Effective atomic #
  5. Object shape
  6. kVp