Practice: The authors discussed implications for service provision, but did not state any implications for practice in view of the limited evidence found.
Research: The authors stated several implications for further research.
Studies should be conducted to determine which psychosis patients within each age group are currently referred for CT or MRI and why.
A high-quality diagnostic before-after study incorporating cost analysis should be undertaken to determine whether patients with no signs or symptoms of pathology additional to psychosis should have CT or MRI scans (there are ethical dilemmas to be addressed with this proposal).
A study of the potential benefits of CT or MRI in patients aged over 65 years should be undertaken. Either an RCT comparing CT and MRI scans in patients with psychosis with and without additional pathologies or a diagnostic before-after study of both techniques in this population should be undertaken.
A before-after study in patients with misidentification syndromes is recommended.