The Clinical Trials Program at the ESRF Biomedical Beamline ID17: Status and Remaining Steps

For several years the ID17 Biomedical beamline at the ESRF has developed synchrotron radiation therapy preclinical programmes to treat aggressive brain tumours. Two techniques have been developed at the ESRF:a) The Microbeam Radiation Therapy (MRT) using spatially fractionated “white beam” (energies 50–300 keV) irradiation (beam widths 25–100 μm, spacing between beams 200–400 μm ) with extremely high dose rates (up to about 20 kGy/s) and depositing very high doses (300–1000 Gy) in the targeted tissue.b) The Stereotactic Synchrotron Radiation Therapy (SSRT) using spatially homogeneous monochromatic beam with the energy closely above that of the K‐edge of a contrast‐ or chemotherapeutical agent (iodine, gadolinium, platinum) loaded into the tumour volume for obtaining a dose‐enhancement.In 2005 an International review panel of oncology experts has recommended to move to clinical trials on humans in SSRT and on large animals in MRT. The works required for this program were launched in autumn 2007 with constr...