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Synchrotron X-ray microbeams show remarkable tissue sparing in the central nervous system (CNS), allowing high-dose radiation delivery without radionecrosis for brain disorder treatments.

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Area of Science:

  • Physics and Biology
  • Radiation Oncology
  • Neuroscience

Background:

  • Synchrotron X-ray microbeams exhibit unique biological properties.
  • These microbeams demonstrate significant tissue-sparing effects, particularly in the central nervous system (CNS).
  • This allows for the delivery of extremely high radiation doses without causing radionecrosis.

Purpose of the Study:

  • To investigate the potential of synchrotron X-ray microbeam arrays for non-invasive brain network modulation.
  • To explore the tolerance of brain and spinal cord tissues to high-dose microbeam irradiation.
  • To assess the feasibility of microradiosurgery for treating brain disorders.

Main Methods:

  • Utilizing synchrotron-generated X-ray microplanar beams (microbeams).
  • Employing stereotactic designs for precise beam delivery.
  • Irradiating brain and spinal cord tissues with microbeam arrays up to 0.7 mm beam width and doses up to 400 Gy.

Main Results:

  • Demonstrated remarkable tolerance of brain and spinal cord to high-dose microbeam irradiation.
  • Confirmed the ability to deliver doses in the hundreds of Gray to targeted areas without harming surrounding tissues.
  • Showcased the potential for creating cortical transections or subcortical lesions non-invasively.

Conclusions:

  • Synchrotron X-ray microbeam arrays offer a novel microradiosurgical approach for brain disorder treatment.
  • The tissue-sparing effect enables high-dose radiotherapy with reduced side effects.
  • This technology holds promise for treating functional neurological disorders like epilepsy and movement disorders.