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 Villabona^1,2, Francesca Benedetta Pizzini³, Thomas Solbach⁴, Giuseppe Ricciardi³, Magdalena Sokolska^5,6, 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 Jäger^4,6

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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