Strategy for EArly Recognition of Cancer, COPD & Heart Failure in the Emergency Department

Inclusion Criteria: Unconsented Use of Harrison CXR Algorithm in Emergency Department (ED): * Frontal Chest X-Ray (CXR) (AP or PA) acquired in the Queen Elizabeth University Hospital (QEUH) ED * Patients aged 18 or over * Appropriate meta data (DICOM) to allow for Harrison CXR processing and secondary capture report provision. Patient Focus Groups: * Aged 18 or over * Able to provide written, informed consent in English. Clinician Focus Groups: * Aged 18 or over * Able to provide written, informed consent in English. * Working as a doctor, advanced nurse practitioner or advanced clinical practitioner in ED, radiology or downstream medical specialties * For post-implementation focus groups only, must have at least 4 months experience of working with Harrison CXR algorithm. Diagnostic Clinic: * Patients without terminal illness or advanced frailty * Usual healthcare provider based in NHS GGC Exclusion Criteria: Applies to use of unconsented CXRs: \- Patient has requested that they are removed from the study, or has objected to the use of AI in their routine clinical care and this has been subsequently upheld by the health board. Applies to invitation to combined diagnostic clinic: * Patients not available to follow up, including patients i.e. whose the patient's usual care (or onward care following index admission) is out-with NHS GGC. * Patients who have been referred to palliative care for end-stage disease, or patients with severe frailty (i.e. bedbound) will not be invited to the combined diagnostic clinic For Patient and Clinician Focus Groups: * Unable to provide informed written consent in English * Aged \<18