LEXINGTON, Mass.--(BUSINESS WIRE)--Imprivata®, (NYSE: IMPR), the healthcare IT security company, today announced it has acquired HT Systems, the market leading provider of palm-vein based biometric patient identification systems, to enter into the emerging patient identification market, which Imprivata estimates to be approximately $2.0 billion globally. The acquisition of HT Systems and its PatientSecure® biometric patient identification technology supports Imprivata’s long-term vision to be t