1. 
   Isocenter
   Isocenter in aerial photography: A point where a line meets at 90-angle of tier/2. It is the point on the aerial photo platform that falls on a line half-way between the Principal point and the Nadir point. In imaging physics and radiation oncology, the isocenter is the point in space through which...
   Found op http://en.wikipedia.org/wiki/Isocenter
   
   
2. 
   Isocenter
   One of two points in space defined by alignment fixtures in the NTF set-up and treatment rooms. Patient set-up is usually done on the premise that the area to be treated will lie at the isocenter.
   Found op http://www-bdnew.fnal.gov/operations/accgloss/gloss.html
   
   
3. 
   Isocenter
   One of two points in space defined by alignment fixtures in the NTF set-up and treatment rooms. Patient set-up is usually done on the premise that the area to be treated will lie at the isocenter.
   Found op http://www-bdnew.fnal.gov/operations/accgloss/gloss.html#A
   
   

Tip: double click on a word to show its meaning.