BUZZ-Australia's 4DMedical rises after US lawmakers introduce VA pilot programme bill

** Shares of Australia's 4DMedical 4DX.AX rise as much as 7.2% to A$4.18, their biggest intraday pct gain since July 6

** The medtech firm says bipartisan bill introduced in U.S. House of Representatives directing U.S. Department of Veterans Affairs (VA) to establish a pilot programme

** The pilot programme to use 4D's functional lung imaging software to identify respiratory disorders and lung disease in veterans

** Stock has fallen 3.8% this year, including session moves