Beam parameters

Question 1

How much dose should the PTV get?

Answer 1

cover with min 95% and 107% max of prescribed dose

Question 2

What are hotspots?

Answer 2

Represents a volume outside of PTV which receives a dose higher than 100% of prescribed dose

Question 3

What is a reference point?

Answer 3

A point where 100% of the dose is prescribed

Question 4

What is the isocentre?

Answer 4

Point where rotational axis all intersect