Lesson 1 Flashcards
Refers to fidelity with which anatomic structures being examined.
Radiographic Quality
Faithfully produces structures and tissues.
High-quality Radiograph
What are the most important characteristics of radiographic quality?
Spatial Resolution
Contrast Resolution
Noise
Artifacts
Ability to image small objects.
Spatial Resolution
Ability to image 2 objects and visually distinguish one from the other.
Resolution
Spatial Resolution improves what?
Screen Blur Decreases
Motion Blur Decreases
Geometric Blur Decreases
Ability to visualize recorded detail.
Visibility of Detail
Ability to distinguish anatomic structures of similar subject contrast.
Contrast Resolution
A random fluctuation in the OD of the image.
Noise
What are the 4 Components of Noise?
Film Graniness
Structure Mottle
Quantum Mottle
Scattered Radiation
Unwanted image on radiograph.
Artifact
Refers to the distribution in size and space of silver halide in the emulsion.
Film Graniness
Refers to the phosphor of radiographic intensifying screen.
Structure Mottle
Refers to the random nature by which x-ray interacts with image receptors.
Quantum Mottle
What component of Noise that is under control of radiologist technologist?
Quantum Mottle
Connected with Resolution and Noise.
Speed
Connected with resolution and noise.
Speed
What termed also used to measure of screen speed?
Relative Speed
Who first discover the relationship?
Hurter and Driffield Curve
In what year was the relationship discovered?
1890
D log E means?
Density log Exposure
What are the Characteristics of curve?
Hurter and Driffield Curve
Sensitometric Curve
Density log Exposure Curve
Degree of blackening the radiographs.
OD (Optical Density)
What are the parts of the curve?
Base plus fog
Toe
Straight-line portion
Shoulder
Maximum Density (Dmax)
