<prompt> The investigation of choice for vestibular schwannoma isContrast enhanced CT scanGadolinium enhanced MRISPECTPET scan  <response>: MRI with gadolinium contrast. It is superior to CT scan and is the gold standard for diagnosis of acoustic neuroma.Intracanalicular tumour, of even a few millimetres, can be easily diagnosed by this method.Dhingra 6e pg: 113 