Computed tomographic angiography (CTA) is recommended as a screening tool in selected patients after blunt cervical trauma who meet the modified Denver Screening Criteria for suspected vertebral artery injury (VAI).
Modified Denver Screening Criteria for blunt cerebrovascular injuries: Lateralizing neurologic deficit (not explained by CT head)
Infarct on CT head scan
Cervical hematoma (nonexpanding)
Massive epistaxis
Anisocoria/Homer’s syndrome
Glasgow Coma Scale score <8 without significant CT findings
Neither spinal angiography nor myelography is recommended in the evaluation of patients with spinal cord injury without radiographic abnormality (SCIWORA). (CNS-SCIWORA 2013, p.227; Level C)