This is a non-contrast cranial CT from a patient who sustained a fall injury, landing on the back of the head. The CT here shows the cranium utilizing the “bone window”. One can appreciate that the details of the skull bone is shown in greater detail. In contrast, the contents within the skull as well as surrounding soft tissue are now shaded in grey. By utilizing the “bone window”, a vertical ‘hairline’ crack can be seen at the occiput of the skull. The patient has sustained a fracture of the occipital bone.