IMRT and Nasal Tumors


Canine and feline nasal tumors  should derive great benefit from IMRT.  These tumors have always presented a treatment challenge because of the complex geometry of the head and the shape of the tumor. 

The beam sculpting provided by the sliding leaves of the multileaf collimator allows the eyes and skin to be spared, greatly minimizing acute effects. 

Total dose can be increased while still minimizing acute effects.  This should lead to improved tumor control.

IMRT allows dose to be delivered to tumor (left) while minimizing side effects

Beam's eye views (BEVs) of all fields, showing intial collimator positions.


Isodose curves are like topography maps showing specific doses to each region.


Doses can also be shown as a color wash.


A dose volume histogram demonstrating the vast difference between the dose of radiation administered to the tumor and the dose administered to the normal tissue structures.


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Updated: May 12, 2008