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%.

A tumor is treated using an AP field with a high-energy photon beam. The tumor is located at a depth of 8 cm where the percent depth dose is 79.8%. The spinal cord is in the path of the beam and Is located at a depth of 16 cm where the percent depth dose is 39.3%. If 250 cGy is delivered to the tumor, calculate the dose delivered to the spinal cord.

1 R = ____.