Neuroimaging

Question 1

How is a suspected SAH investigated?

Answer 1

CT scan - false negative of 5%, so lumbar puncture require to exclude SAH.
Determination of cause/planning treatment:
Digital subtraction angiography (type of fluoroscopy technique) gold standard
(may also use CTA/MRA)

Question 2

How is an aneurysm treated?

Answer 2

Craniotomy and clipping
or Endovascular (detachable platinum coils dropped into aneurysm - slows blood flow and allows thrombosis to occur)