What gantry angle would be displayed for the following situation on a Varian Truebeam? The patient is supine, head-first. The therapist rotates down the patient’s left side to the PA angle.

Which of the following would not tolerate a dose of 4000cGy to 3/3 of the volume based on TD5/5 guidelines?

____________ occurs around 1600 – 2000 cGy to the skin?  

Each Hounsfield unit (HU) value corresponds to a specific density or shady of gray. Bone would be assigned what HU number and what color would it closest resemble?

Describe in detail (using medical terminology) what is included in the PTV and why it is important to the therapist when aligning a CBCT.

When treating a pelvic patient on a linear accelerator you align your patient to the three markings highlighted green in the diagram.  This is known as:

What is the lateral separation(cm) if you are provided with the following SSDs? Gantry 0: 86 Gantry 65: 85 Gantry 90:  84 Gantry 260: 84 Gantry 270: 83 Gantry 180: 85

The total energy absorbed per unit mass of material (Absorbed dose) is measured with this unit:

Which of the following is not found inside the head of a linear accelerator?

The NRC defines occupational exposure annual effective dose limit as: