“But Doc, I didn’t hit my head THAT hard” Computed tomography (CT) scans are frequently performed after a head injury to rule out acute intracranial findings. However, most Emergency Department patients with a head injury have no acute CT findings. The Canadian CT Head Rule (CCHR) was developed to help clinicians determine when to order a CT image for patients with minor head injury.1 In 2010, a multi-centre prospective trial implemented the CCHR and …