What is the greatest limitation of orthovoltage beams for treating deeper tumors?

Name structure “P” of the ear.

Name lobe “B”.

Absorbed dose is maximum at the surface.

If you wanted to pick a dosimeter for an intracavitary application, which of the following would be the most likely choice?

The dose to air is found to be 1.8 Gy. What is the exposure?

How do charged particles primarily interact? 

What is the collection efficiency? 

What is the function of an ion chamber in a linear accelerator? Select all that apply.

If the dose to a target volume is 190 cGy (PDD = 90%), calculate the dose to an underlying structure located at a depth of 13 cm where the PDD is 32%.