“…Numerous methods have been developed to increase the biological dose to the tumor area while sparing surrounding normal tissue. These include the use of neutrons [9,14], heavy particles [6], boron neutron capture therapy [2], radiosensitizers [21,26], hyperthermia [33], modified fractionation schemes [23], conformal radiation therapy [16], high-dose-rate interstitial brachytherapy [29], iodine-125 seeds [13,32], stereotactic radiosurgery [4,8], and -last but not least -IORT [7,20,25]. The vast majority of these studies showed an increased rate of radiation necrosis without an improvement in overall survival.…”