In most cases, cancers of the rectum have a histological pathology of

Lymph is excessive tissue fluid that consists mostly of 

When treating a patient source to axial distance, the isocenter and tumor volume will be located

Before a patient is prescribed any radiation therapy dose, what is the most important thing that must occur before the patient can be considered for treatment?

Which of the following statements best describes radiation treatment depths for a given portal?

In discussing therapeutic ratio, when a tumor can be destroyed but normal tissue suffers severe complications, the tumor is thought to be:

Medical accelerator hazards, which cause the dose to be delivered to the wrong area are caused by all of the following except

Your patient is lying on the treatment table and the doctor orders that the isocenter be shifted or moved caudal in the patient. Which direction would the treatment table (PSA) need to be moved?

Fractionation is best defined as a/an

You have a metastatic brain patient coming to your department to begin whole brain treatments. The doctor orders parallel opposed treatments to depth of midline in the brain. What is the best way to determine depth?