Healthcare Network

A system to control operation of a user device configured for use by a radiologist. An association between a medical condition and one or more decision trees is maintained. Each decision tree comprising nodes organised in a tree structure originating at a root node and terminating at leaf nodes via branch nodes. The nodes are linked to each other via outputs and each output causes the system to differently control operation of the user device. Responsive to receiving medical information associated with the patient, identifying, using the association, a decision tree. For the root node of the identified decision tree: responsive to receiving data indicative of a first output regarding the root node, selecting a first node; causing the user device to retrieve medical information from one or more data sources based on the first node; and causing the retrieved medical information to be displayed on the user device.