A total of 146 patients without symptomatic intracranial haemorrhage on computed tomography after thrombolysis were allocated to two groups : group A ( n = 72 ) received antiplatelets 24h after recombinant tissue plasminogen activator , regardless of SWI-detected haemorrhage ; group B ( n = 74 ) received antiplatelets for patients without SWI-visualised haemorrhage .