immage critique - density
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Film density | the degree of overall blackening from the black metallic silver deposited in the emulsion
🗑
|
||||
| Window level | digital processing that produces changes in density/brightness
🗑
|
||||
| In CR and DR “density” refers to: | image density or brightness
🗑
|
||||
| What is the controlling factor of density for screen film? | mAs
🗑
|
||||
| What is the controlling factor of density in digital? | window level
🗑
|
||||
| What does mAs control in digital? | it assures proper exposure of the IR
🗑
|
||||
| What change in mAs is necessary to produce a visible change in density on screen film? | 30%
🗑
|
||||
| How should changes in mAs be determined? | mAs should always be doubled of halved
🗑
|
||||
| FSS can affect density how on an improperly calibrated machine? | 30% increase
🗑
|
||||
| Anode heel effect is what? | 45% greater density on the cathode side of the tube
🗑
|
||||
| How are filtration and density related? | inversely
🗑
|
||||
| Increased tissue thickness affects density how? | increased scatter increases overall density
🗑
|
||||
| Increase in atomic number (Z | ) affects density how?
🗑
|
||||
| Distance and intensity are related how? | ½ distance = ¼ intensity
🗑
|
||||
| “density maintenance formula”? | direct square law
🗑
|
||||
| Beam restriction and density are related how? | inversely
🗑
|
||||
| How are scatter and density related? | increased scatter increases overall film density, any factor increasing scatter increases density.
🗑
|
||||
| Additive pathology and density | additive pathologies are radiopaque, decreasing overall film density.
🗑
|
||||
| Destructive pathology and density | destructive pathologies are radiolucent , increasing overall film density
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
annaluz87
Popular Radiology sets