Sharfaraz Salam1, Tatiana Mihalova2, Rekha Siripurapu3. 1. Department of Neurology, Salford Royal NHS Foundation Trust, Salford, UK Pennine Acute Hospitals NHS Trust, Manchester, UK. 2. Department of Neurology, Salford Royal NHS Foundation Trust, Salford, UK. 3. Department of Radiology, Salford Royal NHS Foundation Trust, Salford, UK.