Prac 1 Oesophagus Flashcards
1
Q
What is a typical dose prescription for oesophagus?
A
50.4Gy/ 28 fractions
2
Q
What energy beam is used for oesophagus treatment? and where is dose prescribed?
A
6MV to RP
3
Q
What is the beam arrangement for oesophagus?
A
3-4 beams depending on PTV location
ED wedges
4
Q
What is the PTV to MLC margin?
A
0.7cn
5
Q
What are the OAR for oesophagus?
A
Spinal Cord proper
Spinal cord PRV (0.5cm)
Heart
Rt and Lt Lung
6
Q
What is the max dose to spinal cord?
A
max dose <45Gy
7
Q
What is the max dose to spinal cord PRV?
A
Max dose <50Gy
8
Q
What is the max dose to Lt and Rt Lung?
A
V20 <30-35%
9
Q
What is the max dose to Heart
A
V25 < 10%
mean heart dose <3Gy
10
Q
What is the max dose to Non-target tissue?
A
max dose 50Gy
