Research valuation CE-MRA 1.5Tesla taken in diagnosis CA - TOF-MRA and CE-MRA1.5Tesla and are of high value and very similar in detecting CA including CA size ≤ 3 mm, location, size medium length pockets, large pocket, neck size, percentage body / neck (RSN), antique pocket size ≥ 4 mm, CA morphology, branching blood vessels going from CA, status and level of parent arterial spasm and disability / aplatic segment A1, P1.