II. Indications: Head Imaging (typically MRI Brain with and without contrast)
- See Headache Red Flags
- Trigeminal autonomic Cephalgia (Cluster Headache, Paroxysmal Hemicrania, Hemicrania Continua, SUNCT Syndrome)
- Headache with new features or neurologic deficits
- Suspected intracranial abnormality
-
Chronic Progressive Headache over weeks to months
- Neuroimaging recommended for organic Headache Evaluation, but yield is 1%
III. Protocol: Imaging selection
-
Immunocompromised
- MRI Head with and without contrast
-
Temporal Arteritis suspected in age >60 years
- MRI Head with and without contrast
- Requires starting Corticosteroids and obtaining temporal artery biopsy
- Suspected Meningitis
- CT Head or MRI Head without contrast
- Start antibiotics and obtain Lumbar Puncture
- Pregnancy and severe Headache
- Suspected carotid dissection with severe unilateral Headache
- MRI Head with and without contrast and MRA of the head and neck OR
- CTA head and neck
- Sudden onset severe Headache (first or worst, thunderclap)
- CT Head without contrast followed by CTA Head or Lumbar Puncture or
- MRI Head with and without contrast and MRA Head