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 

The difference in gantry angle position for a wedged pair of photon fields is 150°. Assuming the surface is perpendicular to the beam axes, the most appropriate wedge angle, to achieve a uniform distribution is:  

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  

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

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

Prone breast treatment can: 

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

What is the term for margin added to CTV to compensate for expected physiologic movements and variations in size, shape, and position of the CTV during treatment? 

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

In order to improve image resolution, would we increase or decrease the thickness of out CT slice?