When should an MRI be done for patients with symptoms of sciatica?
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Magnetic resonance imaging (MRI) should be considered in patients with sciatica if "red flag" symptoms are present. MRI should also be considered for patients with sciatica in whom conservative treatment has failed over 4 to 6 weeks and who are potential surgical candidates. (SOR B, derived from evidence- based guidelines.)
Evidence-based practice 11, no. 05 (2008): 04-05