International Stereotactic Radiosurgery Society

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The ISRS webinar series began in 2016. We have already delivered over 30 webinars on intracranial and body SRS and from experts around around the world.

A video replay of each past webinar is available to ISRS members.

Next Webinars

May 03, 2018

Radiosurgical management of trigeminal neuralgia by Mojgan HODAIE

1:00 pm (Dublin, Edinburgh, Lisbon, London) - 2:00 pm CET (Amsterdam, Berlin, Bern, Paris, Rome, Stockholm, Vienna) - 8:00 am (Eastern time - New York, Canada) - 9:00 am (Brasilia) - 9:00 pm (Tokyo) - 5:00 am (Pacific time - Los Angeles) - 10:00pm (Brisbane)

This webinar will focus on trigeminal neuralgia, a unique facial neuropathic pain disorder that is highly amenable to radiosurgical treatment. The diagnosis, methods of treatment as well as the role of radiosurgery in the management of this condition will be discussed. Important research studies contributing to our understanding of trigeminal neuralgia and the effect of radiation will be reviewed.

May 24, 2018

The patient QA problem in radiosurgery: what are the most recent recipes in the dosimetry cookbook? by Elena DE MARTIN

1:00 pm (Dublin, Edinburgh, Lisbon, London) - 2:00 pm CET (Amsterdam, Berlin, Bern, Paris, Rome, Stockholm, Vienna) - 8:00 am (Eastern time - New York, Canada) - 9:00 am (Brasilia) - 9:00 pm (Tokyo) - 5:00 am (Pacific time - Los Angeles) - 10:00pm (Brisbane)

Considering the complexities of the dose delivery process in stereotactic radiosurgery, dosimetry verification of patient-specific treatments prior delivery is critical to the clinical outcome. Despite this, there are no single definitive detector or procedure recommended and an overview of the possible different approaches will be given in this presentation. 

June 25, 2018

The challenge of dosimetry in stereotactic radiosurgery: new detectors for machine and patient’s Quality Assurance. by Marco PETASECCA

1:00 pm (Dublin, Edinburgh, Lisbon, London) - 2:00 pm CET (Amsterdam, Berlin, Bern, Paris, Rome, Stockholm, Vienna) - 8:00 am (Eastern time - New York, Canada) - 9:00 am (Brasilia) - 9:00 pm (Tokyo) - 5:00 am (Pacific time - Los Angeles) - 10:00pm (Brisbane)

Use of photon small fields have been an established practice in stereotactic radiosurgery for many years and have more recently been extended to extra‐cranial stereotactic treatments. Large discrepancies in dosimetric measurements amongst institutions have been reported as well as incidents primarily as a result of the use of inappropriate detectors and consequent inadequate modelling of the photon beam in the treatment planning systems. The source of many of the mistreatments is the fact that it's often forgotten that much of the theory, practice and beam modelling in radiation therapy is based on the implicit assumption of the more common broad fields. Small field conditions occur as a result of the initial beam energy, lack of charge particle equilibrium and geometrical source occlusion. Lateral disequilibrium varies the central-axis spectrum while collimation of the beam varies the off-axis spectrum with a strong dependence upon the type and composition of the collimator. Accurate measurement of dosimetric quantities for modelling of the beam in such conditions, strongly depends on the size and technology of the detector adopted with respect to the field dimensions and beam energy. Commercial and state-of-the-art dosimeters and their performance in small field dosimetry are presented in relation to their use in stereotactic radiosurgery.