Formulas Flashcards
(27 cards)
Equation for calculating thickness of lead for an electron energy:
E/2
Ex: 9MeV needs 4.5 cm of lead
Equation for calculating thickness of Lipowitz alloy for an electron energy:
E/2 then multiply by 1.2
What is the formula for MU extended distance?
What is the formula for magnification factor?
What is the formula for Maynord “F” factor?
What is the formula for equivalent square?
What is the formula for blocked equivalent square?
What is dose at Dmax or “Applied Dose”?
What is dose at underlying structure (not Dmax)?
What is the wedge angle formula?
2 not 20
What is the hinge angle formula?
What is the gap calculation formula?
What is the inverse square law?
What is the inverse square factor?
What is the formula for the 80% isodose line of electrons?
What is the formula for 90% isodose line of electrons?
What is the formula for useful range of electrons?
What is the formula for cutout thickness (in mm) of electrons?
What is the formula for arc rotation?
What is the formula for therapeutic ratio?
What is the formula for tissue weighting?
What is the formula for mean life ?
What is the formula for mean energy?
What is the formula for block thickness as it relates to desired transmission?
