Which of the following statements are TRUE regarding the use of hand blocks?  Hand blocks are pre-made with a diverging cut that matches field divergence Hand blocks are pre-made non-divergently cut Hand blocks generate less penumbra than custom blocks Hand blocks generate more penumbra than custom blocks 

During Inverse planning, which of the following parameters are NOT set by the dosimetrist?   Field Gantry Angle  Field Apertures and MLC Blocking   Field Energy  Field Weighting  

From an AP beam in an IMRT Prostate plan, which intensity pattern would you expect to see to spare the rectum? (Fig. 1) 

How is the field size defined geometrically? 

Which electron cutout is likely to have the biggest loss of lateral scatter equilibrium and most significant high-isodose constriction?  

True or False: If a patient has had a complete surgical resection, you can still draw a GTV on the CT. 

What is a more modern method to correct for surface irregularities?

Which of the following were direct innovations that led to the availability of IMRT treatment planning?  Introduction of Motorized Multi-Leaf Collimation (MLC) Enhanced computing capabilities to support complex inverse planning algorithms Enhanced Image Guidance capabilities on the Linear Accelerators Introduction of Computed Tomography (CT) into radiation treatment planning  

True or False: Dose rate is decreased by blocking because of decreased scatter. 

What is the formula for finding the couch rotation needed when treating a CSI patient?