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Table 1 Conformality Index (CI) of Helical Tomotherapy and Gamma Knife Stereotactic Radiosurgery Plans in Patients with Single Brain Metastasis.

From: Dosimetric comparison of Helical Tomotherapy and Gamma Knife Stereotactic Radiosurgery for single brain metastasis

  TOMOTHERAPY GAMMA KNIFE
Patient #1 0.577 0.597
Patient #2 0.562 0.618
Patient #3 0.603 0.593
Patient #4 0.644 0.696
Patient #5 0.547 0.507
  1. CI = (PTV volume within the prescribed iso-dose line)2/[(tumor volume)*(volume of the prescribed dose)]