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Formulas
Imaging 2
Question | Answer |
---|---|
Inverse square law | MR1 over MR2 = D2(squared) over D1 (squared). (up, down) |
Direct square law | i1 over i2 = SID1(squared) over SID2(squared). (up, up) i=mAs |
Grid conversions | 0=1, 5:1=2, 6:1=3, 8:1=4, 10:1=5, 16:1=6 |
Grid conversion formula | mAs1 over mAs2 = GCF1 over GCF2. (up, up) |
Relative/screen speed | mAs1 over mAs2 = RS2 over RS1. (up, down) |
*Relative speed* High speed has ____ crystals, so ____ mAs is needed than with slow speeds. | more crystals, less mAs. (has less detail though) |
Magnification | MF= SID/SOD |
SID= ____ + _____ | SOD + OID |
kVp... 15% increase? | Decrease mAs by 50% or 1/2 |
kVp.... 15% decrease? | Increase mAs by 100% or 2 |