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

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.

July 10, 2018

Stereotactic radiosurgery in vicinity to anterior optic pathways by Vladyslav BURYK

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) - 3:00 pm (Riga)

Treatment of pathological lesions in the zone of the anterior optic pathways still challenges radiosurgery. Visual pathways dose tolerance continues to be the subject of radiobiological and clinical investigations. The webinar will discuss SRS for lesions in vicinity to anterior optic pathways, as well as the risk and prevention of radiation-induced optic neuropathy (RION) depending on the radiation dose to the optical apparatus and the fractionation regime.

July 30, 2018

Management of unruptured AVMs in the post ARUBA era. What is the natural course and should we recommend treatment? by Bengt KARLSSON

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)