Any patient with a neurologic deficit, depressed GCS, palpable skull fracture, or worrisome mechanism will warrant a non-contrast head CT after initial stabilization and resuscitation.
Canadian CT Head Rule for patients with minor head injury
Can be used to decide which minor injuries will require head CT
Findings on CT are, classically, a lens (or lemon-shaped) shaped hyperdense lesion with sharp margins in the temporoparietal region
Blood along the inside of the skull will not cross the sutures.  This helps differentiate acute epidural hematoma from acute subdural hematoma.
Can be used to decide which minor injuries will require head CT
Blood along the inside of the skull will not cross the sutures.  This helps differentiate acute epidural hematoma from acute subdural hematoma.
Consider head CT (rule out intracranial hemorrhage)
Use validated decision rule to determine need
Avoid CT in patients with minor head injury who are at low risk based on validated decision rules.
Consider cervical and/or facial CT
Appropriate trauma resuscitation of all patients with head trauma
A thorough neurological examination of any patient with head trauma BEFORE administration of RSI
Use validated decision rule to determine need
Avoid CT in patients with minor head injury who are at low risk based on validated decision rules.
Epidural hemorrhage
Intra-axial
Subdural empyema
Hemorrhagic stroke 
Epidural abscess 
Traumatic intracerebral hemorrhage
Post-lumbar puncture headache
Extra-axial