Spatial Pulse Length
   
prostorska dolžina pulza
   
prostorna dužina impulsa
   
空間パルス長
  Organ at risk

Any normal tissue whose radiosensitivity significantly influences the treatment planning or prescribed dose, is known as an Organ At Risk (OAR).  As for the target volume, it is important to consider the physiological movement and set up errors, and incorporate this variability within a margin. 
 
The use of OARs as planning volumes was proposed by the ICRU in Report 50 (with addendum 62).  This report provided a common framework on prescribing, recording and reporting ther...
 
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