New Three-dimensional Moving Field Radiation Therapy for Brain Tumors

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  • MITSUYAMA Fuyuki
    Departments of Neurosurgery, Fujita Health University School of Medicine
  • KANNO Tetsuo
    Departments of Neurosurgery, Fujita Health University School of Medicine
  • JAIN Vijanbra K.
    Department of Neurosurgery, National Institute of Mental Health and Neurosciences
  • NAGATA Yutaka
    Departments of Physiology, Fujita Health University School of Medicine
  • KOGA Sukehiko
    Departments of Radiology, Fujita Health University School of Medicine

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A new modified rotation radiation method called “three-dimensional moving field radiation therapy” is described. The new method uses rotation in many planes while maintaining the same isocenter to achieve a good spatial dose distribution. This delivers a high dose to tumors and spares the surrounding normal structures. This easy method can be carried out using the equipment for conventional rotation radiation therapy.<BR> The new method was superior to the one plane rotation radiation therapy using a physical phantom with film, a chemical phantom using the iodine-starch reaction, and a new biological model using tumor cells. Treatment of six brain tumors irradiated with total air doses of 50-60 Gy caused no hair loss or radiation necrosis.

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