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Abstract #2451

Triple Magnetic Resonance Angiography (triple-MRA) for confirmation of obliteration following Gamma Knife Radiosurgery for Arterial-Venous Malformations of the brain

Alvaro Rojas Villabona1,2, Francesca Benedetta Pizzini3, Thomas Solbach4, Giuseppe Ricciardi3, Magdalena Sokolska5,6, Christos Lemonis3, Enrico De Vita6, Yuriko Suzuki7, Matthias JP Van Osch7, Roberto Israel Foroni3, Stefania Montemezzi8, David Atkinson9, Michele Longhi10, Elisa Ciceri3, Neil Kitchen2, Antonio Nicolato10, Xavier Golay6, and Hans Rolf Jäger4,6

1The Gamma Knife Centre at Queen Square, National Hospital for Neurology and Neurosurgery, London, United Kingdom, 2Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, United Kingdom, 3Neuroradiology Unit, Department of Diagnostic and Pathology, University Hospital of Verona, Verona, Italy, 4The Lysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, London, United Kingdom, 5Medical Physics and Bioengineering, University College London Hospital, London, United Kingdom, 6Academic Neuroradiological Unit, Department of Brain Repair and Rehabilitation, Institute of Neurology, University College London, London, United Kingdom, 7C. J. Gorter Center for High Field MRI, Department of Radiology, Leiden University Medical Center, Leiden, Netherlands, 8Radiology Unit, Department of Diagnostic and Pathology, University Hospital of Verona, Verona, Italy, 9Centre for Medical Imaging, University College London, London, United Kingdom, 10Department of Neuroscience, University Hospital of Verona, Verona, Italy

This study assesses whether a combination of three Magnetic Resonance Angiography (MRA) techniques, referred to as triple-MRA, can be used as an alternative to DSA for confirmation of AVM obliteration following GKR and to characterise residual AVMs in case of incomplete response.

The follow up DSA and triple-MRA of twenty-four patients were independently reviewed by two observers regarding the presence/absence of a residual AVM. Triple-MRA consistently agreed with DSA regarding the absence or presence of residual AVMs and proved to be highly suitable for characterisation of residual AVMs.

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