If you are comparing the PDD of a 6 MV photon beam to a 18 MV photon beam at the same depth beyond dmax, which statement is most likely true?

The _______________ in a linear accelerator increases the uniformity of the intensity of an xray beam.

Which of the following are reasons for safety data sheets in the healthcare setting? I. for employees who are occupationally exposed to a hazard II. for employees to understand proper storage of materials III. for assisting emergency responders IV. for patient instruction about proper use during procedures  

Field A is 10 cm x 10 cm set up at 100 cm SSD, and Field B is 10 cm x 10 cm set up at 90 cm SSD. Which of the following is true regarding geometric beam penumbra of these two fields?

A treatment is prescribe at 80 cm SAD. The field size indicator is set for 14 cm, what would the field size be at the surface of the patient of the SSD is 75 cm?

Which of the following neoplasms is most likely benign?

Radiation work areas that may be potentially hazardous to patients, personnel, and the general public should have signs posted that show:

Which of the following normal tissues is most strongly influenced by the volume effect due to its parallel functional subunit (FSU) organization,  allowing the organ to tolerate high dose to small volumes without complete loss of function?

When treating the upper abdomen, which tissue is likely going to be the most dose limiting?

Which structure is associated with increased risk of cardiac related mortality after irradiation of the left chest?