Hand Calculation Methods

Question 1

Define PDD Formula

Answer 1

DD = Dose@depthd/Dose@depthdmax

Question 2

TAR Formula?

Answer 2

Dose at depth d/dose in air of buildupcap

Question 3

Are %DD curves are SSD dependant whereas TAR/TMR/TPR curves are independent of SSD?

Answer 3

YES IMPORTANT

Question 4

Collimator scatter factor depends on what?

Answer 4

Field size

Question 5

Please select all of the following that may be considered independent of SSD.
TAR
PDD
TMR
TPR

Answer 5

All But PDD