1
Q
Therapeutic Ratio
A
2
Q
Gap Formula
A
3
Q
Gantry Speed
A
4
Q
Wedge Angle
A
5
Q
Hinge Angle
A
6
Q
Direct Proportion
A
7
Q
Inverse Square Law
A
8
Q
Inverse Square Factor (ISF)
A
(D2/D1)^2
9
Q
Field Weights
A
10
Q
MU Calculations
A
11
Q
Blocked Sterling Square
A
12
Q
Sterling Formula
A
13
Q
Mag Factor
A
Image size\object size OR. SID/SOD
Object size= image size/mag factor
14
Q
Mayneord F
A
15
Q
Collimator and Couch Rotations
A
16
Q
Average Life
A
17
Q
Decay
A
18
Q
Half Life
A
19
Q
Temperature/Pressure Correction
A
20
Q
Applied Dose (dose @ max)
Vs
Dose at depth
A
21
Q
Lead block Thickness Electrons
A
MEV/2 + 1 = mm of lead
X 1.21 for cerrobend
