Home > Cancer > Radiation Targeting Tumors Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Apr 06, 2008 by SSpencer, Views: 5256 IMRT or Intensity Modulated Radiation Treatment is a way for doctors to help treat tumors with radiation, but sparing the healthy cells around the tumor. Dr. Sharon Spencer. Univ. of ALabama at Birmingham.