MRI Imaging for 2-Month Headache History

Primary Recommendation

• The American College of Radiology recommends ordering an MRI brain without IV contrast and MRI complete spine without IV contrast to evaluate for both general intracranial pathology and spontaneous intracranial hypotension in adults with orthostatic headache from suspected spontaneous intracranial hypotension (SIH) without recent spinal intervention 1, 2, 3, 4, 5, 6, 7, 8
• The American College of Radiology states that both MRI brain and MRI complete spine are required to assist in localizing a potential CSF leak in adults with orthostatic headache from suspected SIH without recent spinal intervention 1, 2, 3, 4, 5, 6, 7, 8

Rationale for Dual Imaging

Brain MRI Component

• Brain MRI detects intracranial pathology including masses, hemorrhage, vascular abnormalities, and inflammatory conditions that could cause chronic headaches 9
• Brain MRI is more sensitive than CT for detecting subtle abnormalities including microbleeds, white matter lesions, and focal encephalomalacia 9

Spine MRI Component

• No relevant facts to report

Contrast Administration Decision

• The American College of Radiology recommends starting with non-contrast protocols for both brain and spine, as contrast is not necessary for initial evaluation of suspected SIH 1, 2, 3, 4, 5, 6, 7, 8, 9

Clinical Context Considerations

Red Flags Requiring Urgent Imaging

• The American College of Radiology recommends urgent imaging if the patient exhibits progressive worsening of headache severity or frequency, new focal neurological deficits, altered mental status, or severe refractory headache not responding to treatment 10

Common Pitfalls to Avoid

• The American College of Radiology advises against ordering brain imaging alone when SIH is suspected, as spine imaging is necessary to localize the leak for potential treatment 1, 2, 3, 4, 5, 6, 7, 8
• The American College of Radiology recommends against using CT as initial imaging for chronic headache evaluation, as MRI is far more sensitive for the relevant pathology 9
• The American College of Radiology advises against adding contrast routinely, as it increases cost, time, and contrast-related risks without established benefit for typical evaluation 9

Expected Findings and Follow-Up

If Imaging is Normal

• The American College of Radiology recommends monitoring for red flag symptoms, considering symptomatic management with NSAIDs or acetaminophen, and reassessing in 2-4 weeks if imaging is normal 10
• The American College of Radiology recommends repeat imaging (MRI preferred) only if headaches worsen, pattern changes, or new neurological findings emerge 10