In the logarithmic equation what is called?

A tumor is treated using an AP field with a high-energy photon beam. The tumor is located at a depth of 6 cm where the percent depth dose is 78.4%. The spinal cord is in the path of the beam and Is located at a depth of 14 cm where the percent depth dose is 35.3%. If 200 cGy is delivered to the tumor, calculate the dose delivered to the spinal cord.

TMR is independent of:

Bragg-Gray cavity theory is used to calculate absorbed dose for any type of radiation. 

Radiochromic films need to be stored in a dry and dark environment.

Every solid-state system needs to be calibrated in a known radiation field before it can be used for the measurement of absorbed dose. 

The dose to air is found to be 1.2 Gy. What is the exposure?

The point of maximum dose is referred to as:

100 rads = 100 cGy.  

If the percent depth dose at a depth of 5 cm using a 6 MV beam (Dmax = 1.5 cm) at an SSD of 100 cm is 77.5%, what is the percent depth dose at the same depth if the SSD is extended to 110 cm?