Old Intensity/New Intensity = Old Distance squared/New Distance squared
What are the annual occupation limits for Effective Dose? How many mSv are in each rem? What are the limits in mSv? What is the occupational yearly dose limit for students under 18 years of age?
5 rem for the whole body, 50 rem for the skin & extremities, 15 rem for the lens of the eye. 1 rem = 10 mSv. 50 mSv for whole body. 500 mSv for skin/extrmities & 150 mSv for lens of the eye. 0.1 rem (100 mrem or 1 mSv) in given year for students under 18.
What is the formula used to determine the amount of image magnification?
Image size/Object Size = SID/OID
What is the gestational dose equivalent limit for the embryo/fetus of a pregnant radiographer? What is the limit per month?
5 mSv (.5 rem) for the gestational period & not to exceed .5 mSv per month (.005 rem, or 5 mrem).
How can the SID be determined with the OID & SOD? How can the SOD be determined with the SID & OID? How can the OID be determined with the SID & SOD?
SID = OID + SOD. SOD = SID - OID. OID = SID - SOD.
What is the formula for Density (Incident light & transmitted light)?
Density = log x incident light intensity/transmitted light intensity
What is the inverse square law?
Old Intensity/New Intensity = New distance squared/Old Distance squared.
What is the Grid Ratio?
GR = H/D (GR = Grid Ratio, H = Height of Pb stip, D = Distance of the interspace material between the Pb strips).
