Pregnant patients presenting with neurological symptoms have a higher incidence of certain conditions but are also at unique risks from ionising radiation and contrast agents. Venous sinus thrombosis is a common differential in pregnant patients presenting with headache.Incidence in the general population 3-5/million and accounts for

Data for all pregnant patients in Brighton and Susex NHS trust who had cross-sectional neuroimaging from the period 01/01/12 to 31/10/17was collected retrospectively from CRIS. The clinical indication was established from the request form which was scanned onto CRIS. Imaging reports were reviewed on PACS and the data analysedwas entered into a large excel database and analysed. Patients from both acute and outpatient settings and patiet demographics, type of imagning, thefinal diagnosis and whether repeat imaging was performed was noted.

164 scans (47 CT and 117 MRI) were performed within the 6 year period. The breakdown is shown in Fig 3. 2 CT’s were performed with contrast, which is relatively contraindicated. 8 MRI scans performed during the first trimester – contraindicated as per RCRguidlines (fig. 4). A follow up CT/MRI performed when the first scan is negative had 0% findings The commonest indication for scanning was headache +/- visual disturbance. Acute pathology was detected in 17 scans (13 acute sinusitis/middle ear infection, 3 intraparenchymal haematoma,...

1. The commonest indication for neuroimaging during pregnancy was headache +/- visual disturbance. 2. The majority of the scans were negative with 0% incidence of VST or pituitary apoplexy. 3. There is no added diagnostic value of repeating the CT or MRI when the first scan is negative. 4. In those with chronic pathology predating their pregnancy, no need to scan during pregnancy unless clinical signs of disease progression (some were scanned in third trimester and could have waited) 5. Limited local and national guidelines...

N. Mahmood; Brighton/UK - nothing to disclose A. Vidziunaite; Brighton/UK - nothing to disclose S. Vundavalli; Haywards Heath/UK - nothing to disclose

1.Fink JN, McAuley DL. Cerebral venous sinus thrombosis: A diagnostic challenge.Intern Med J.2001;31:384–90.