Lesson 1 Flashcards

1
Q

Refers to fidelity with which anatomic structures being examined.

A

Radiographic Quality

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2
Q

Faithfully produces structures and tissues.

A

High-quality Radiograph

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3
Q

What are the most important characteristics of radiographic quality?

A

Spatial Resolution
Contrast Resolution
Noise
Artifacts

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4
Q

Ability to image small objects.

A

Spatial Resolution

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5
Q

Ability to image 2 objects and visually distinguish one from the other.

A

Resolution

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6
Q

Spatial Resolution improves what?

A

Screen Blur Decreases
Motion Blur Decreases
Geometric Blur Decreases

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7
Q

Ability to visualize recorded detail.

A

Visibility of Detail

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8
Q

Ability to distinguish anatomic structures of similar subject contrast.

A

Contrast Resolution

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9
Q

A random fluctuation in the OD of the image.

A

Noise

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10
Q

What are the 4 Components of Noise?

A

Film Graniness
Structure Mottle
Quantum Mottle
Scattered Radiation

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11
Q

Unwanted image on radiograph.

A

Artifact

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12
Q

Refers to the distribution in size and space of silver halide in the emulsion.

A

Film Graniness

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13
Q

Refers to the phosphor of radiographic intensifying screen.

A

Structure Mottle

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14
Q

Refers to the random nature by which x-ray interacts with image receptors.

A

Quantum Mottle

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15
Q

What component of Noise that is under control of radiologist technologist?

A

Quantum Mottle

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16
Q

Connected with Resolution and Noise.

A

Speed

17
Q

Connected with resolution and noise.

A

Speed

18
Q

What termed also used to measure of screen speed?

A

Relative Speed

19
Q

Who first discover the relationship?

A

Hurter and Driffield Curve

20
Q

In what year was the relationship discovered?

A

1890

21
Q

D log E means?

A

Density log Exposure

22
Q

What are the Characteristics of curve?

A

Hurter and Driffield Curve
Sensitometric Curve
Density log Exposure Curve

23
Q

Degree of blackening the radiographs.

A

OD (Optical Density)

24
Q

What are the parts of the curve?

A

Base plus fog
Toe
Straight-line portion
Shoulder
Maximum Density (Dmax)