Figure 4From: Cerebrospinal fluid leakage after radioisotope cisternography is not influenced by needle size at lumbar puncture in patients with intracranial hypotensionRelationship between time after injection and calculated residual radioisotope activity in the CSF space among 22 G, 23 G and 25 G patient groups. X axis shows time after RI injection. Y axis shows percentage RI residual activity. No significant differences between groups were identified at any time point.Back to article page