A single field delivers a dose D1 at a reference depth of d1. The TMR values at the depths d1 and d2 are TMR (d1) and TMR (d2), respectively. The dose at the depth of d2, D2, can be calculated from _____.

The best electron energy to treat a target that is between 1.5 cm and 2.5 cm below the surface while sparing other tissue is _____.

What is the main source of the signal in MRI?

As compared to conventionally fractionated IMRT plans, SBRT plans usually have ________.

As compared to 3DCRT, what is a key advantage of IMRT?

Intensity-modulated proton therapy (IMPT) _____.

In current practice, which type of motion is characterized by 4DCT for gated radiotherapy?

Which imaging study is used to delineate brain metastasis for SRS?

A patient is treated with a single field, SSD = 100 cm. The prescription is 300 cGy/fraction at 5 cm depth. What is the dose (cGy)/fraction at 10 cm depth? Given PDD (5 cm) = 87.0; PDD (10 cm) = 67.0.

Which of the following parameters affect the photon percent depth dose?