PRI Summary of Mathematical Application
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Calulating mAs | mAs = mA x sec
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| 15% Rule to increase density | kVp x 1.15
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| 15% Rule to decrease density | kVp x .85
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| 15% Rule to maintain density when increasing kVp by 15% | mAs/2
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| 15% Rule to maintain density when decreasing kVp by 15% | mAs x 2
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| Inverse Square Law Formula | I1/I2 = (D2)^2/(D1)^2
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| Density Maintenance Formula | mAs1/mAs2 = (SID1)^2/(SID2)^2
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| Inverse square law | The intensity of the x-ray beam is inversely proportional to the square of the distance from the source
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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.
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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.
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Created by:
dawn2000
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