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Three dimensional rotational angiography (3DRA) is a powerful method for depicting intracranial vascular lesions because of its 3D imaging capability. The purpose of this study was to analyse if 3DRA had reduced the incidence of angiogram-negative subarchnoid haemorrhage (SAH) and which type of aneurysm tended to be overlooked with conventional digital subtraction angiography.Angiogram-negative SAH...
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