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PURPOSE OF THE GRID
Grid
Grid Continued
Grid Continued
Grid Continued
Grid Continued
Grid Continued
What is a Grid made of?
Who made the very first grid?
Who is Hollis Potter? and what did he design?
How did Hollis Potter design and upgrade the bucky?
GRID CONSTRUCTION
What kind of materials is the grid made of?
Why is Aluminum used for a Grid?
what are the disadvantages and advantages in using Aluminum for a Grid?
Why are Fiber interspace grids preferred when using low kVp?
Grid ratio
What is the relationship between distance and height of grid strips?
Higher Grid ratios
GRID FREQUENCY
what is the most important thing in determining the grid's efficiency when cleaning scatter?
What does the content of lead do for a grid?
GRID PATTERNS/Linear Grids
Criss-cross or cross hatched grids
Linear Grids
Grid-cutoff
Criss-cross grids
Short-axis grids
GRID TYPES/Parallel grids
Focused grids
grid radius
What does it take for the grid to be properly focused?
Short/long focal range grids
Focused grids
Parallel grids
GRID USES/Stationary grids
Moving grids
moving grids cont
Two movements mechanisms/Reciprocating grid
Two movements mechanisms/Oscillating grid
Grids and scatter
Grids and scatter cont
GRID CONVERSION FACTOR (GCFS)/ look at worksheets and study chart
GRID PERFORMANCE EVALUATION/SELECTIVITY, CONTRAST
Selectivity
Selectivity cont
Contrast
Contrast cont
GRID ERRORS
off-level error
off-level error cont
Off- center error
off-focus error
off-focus error cont
upside down error
The Moire Effect error
The Moire Effect error cont
AN ALTERNATE SCATTER REDUCTION METHOD— THE AIR-GAP TECHNIQUE
AN ALTERNATE SCATTER REDUCTION METHOD— THE AIR-GAP TECHNIQUE cont
