Erisbeg-backed Medray Imaging Systems, a company that provides hospital equipment and supplies, completed the acquisition of Avista Medical, a Dublin-based medical diagnostics business. Financial terms were not disclosed. “Matt Corcoran and the team have built a leading medical imaging business which complements Medray’s diagnostic portfolio and strengthens the service and support offering to our customers," Siobhan Crowley, Medray Imaging Systems CEO.