Fig 5.

Examples in which additional lesions identified by echo 2 suggested a potential underlying mechanism of stroke and potentially altered diagnostic impression and clinical management. A, A 60-year-old woman with vasospasm after subarachnoid hemorrhage. B, A 65-year-old woman with embolic infarcts who also had lesions in the right cerebral hemisphere more inferiorly (not shown). On both patients, echo 2 showed missed sites of reduced diffusivity on the contralateral hemisphere (arrows), suggesting multiple vascular distribution involvement (vasospasm in multiple vascular territories or embolic source). Note that the lesions were retrospectively observed on echo 1 (but not on the product DWI).