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Imaging 2 Problem Solving

Describe the formula to calculate geometric unsharpness. P = FSS x OID / SOD
Describe the formula to calculate magnification based on distances. %M = SID - SOD / SOD x 100
Describe the formula to calculate magnification based on object and image. MF = IW / OW
Describe the relationship between the formulas to calculate magnification factor. MF = SID / SOD = IW / OW
Describe the formula to calculate the percentage of magnification based on distance. % magnification = SID - SOD / SOD x 100
Describe the formula to calculate the percentage of magnification based on object and image. % magnification = IW - OW / OW x 100
Describe the formula to calculate grid ratio. GR = Height (lead strips) / Distance ( between lead strips)
What is the relationship of the generator to beam creation? 1 phase 1 pulse generators are much less efficient than the latest 3 phase 12 pulse generators. 1 phase 1 pulse = output factor 1 1 phase 2 pulse = output factor 2 3 phase 6 pulse = output factor 3 3 phase 12 pulse = output factor 4
Describe the grid conversion factor based on grid ratio. a) No Grid = 1 b) 5:1 = 2 c) 6:1 = 3 d) 8:1 = 4 e) 10:1 and 12:1 = 5 f) 15:1 and 16:1 = 6
How do you maintain receptor exposure when adding, changing, or omitting a grid? mAs1 / mAs 2 = GF1 / GF2
Created by: Larobbins