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The change in the target position during treatment delivery is termed 

When choosing gantry angles during treatment planning, which of the following is not a valid consideration? 

Extra Credit: Image Guided Radiation Therapy  The maximum target dose is the part of the target area receiving the highest amount of radiation. What is the minimum volume considered to have received the maximum target dose. 

A(n) __________ is a reproduction of an external body shape, usually taken through the transverse plane of the central axis of the treatment beam.

The sinuses that form the floor of the orbit are the:

Intrapulmonary nodes are involved first, followed by the spread to the

Shoulder retractors are feasible for positioning and immobilization when treating the 

The patient has a metastatic lesion from T-12 due to metastatic lung disease. The oncologist orders that the patient be treated to a depth of 6.75 cm using a non-isocentric technique. The field is 9.25 cm x 15.4 cm. The patient is able to lie supine and the AP/PA separation is 32.6 cm.  The dosimetrist has produced a treatment plan that calls for a single field to the PA on the Varian Trilogy at the machine’s isocenter, which is 100 cm. What is the AP SSD?

The simulation therapist will use which of the following anatomical structures to alleviate pelvic rotation, which aids in treatment planning and reproducibility? 

Foaming agents, such as __________________________, have become widely used as an immobilization device.