When treating with a single photon field using higher energies will cause less superficial dose

1/2 the beam energy = what? 

Match the HU with the associated tissue

As the field size is increased, the dose decreases.

The order of progression for target volume is: GTV, CTV, ITV, PTV

MLC leaves have less transmission then cerrobend blocks used in the past for custom fields

Breathhold scan is common to use for left-side breast cancer

Select all true statements about prostate planning: 

In a CT scan pixels are defined in Hounsfield Units (HU)

Non-coplanar beams have table kicks