** Shares of Australia's Pro Medicus PME.AX rise as much as 4% to A$246.760, their highest levels since March 11

** Stock among top gainer in the benchmark index .AXJO

** PME posts its biggest intraday pct gain since April 28

** The medical imaging platforms maker signs a A$20 million ($12.86 million), five-year contract with the University of Iowa Health Care

** Co to provide cloud-based Visage 7 Enterprise Imaging Platform

** Stock has fallen 5.2% so far this year

($1 = 1.5550 Australian dollars)

(Reporting by Roshan Thomas in Bengaluru)

((Roshan.Thomas@thomsonreuters.com))