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

Using your rules of thumb from our slides, what does Energy/2 correspond to?  

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  

True or False:  Rotational therapy (arcs) is best suited for cases where the tumor is large, and the surface contour is irregularly shaped. 

Prone breast treatment can: 

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: A maximum point dose of 60Gy is acceptable for the spinal cord.  

True or False: Potential damage to normal tissue increases with increased Integral dose. 

In which of the following diagrams is the wedge symbol on one or more beams oriented incorrectly?