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Planning results in the prostate case. (a), (c), (e) The variations of CN, CN1; and CN2, (b), (d), (f) iso-dose distributions with 80 segments for 7, 15, and 30 beams. CN and visualized dose conformity to the PTV tend to increase as the number of beams increases. Also, the dose distribution with 30 beams is better nearby the femoral heads and normal tissues than that with 7 beams.
