Virtual Radiologic Corp. (Nasdaq:VRAD), Heartland Financial USA Inc. (Nasdaq:HTLF) and Meritage Homes Corp. (Nasdaq:MTH) are among the biggest percentage gainers in Tuesday's trading among companies with market capitalizations under $1 billion.

Also included among the results: Destination Maternity Corp. (Nasdaq:DEST), Parexel International Corporation (Nasdaq:PRXL), Hexcel Corp. (Nasdaq:HXL), ev3 Inc. (Nasdaq:EVVV), Quaker Chemical Corp. (Nasdaq:KWR) and Intevac Inc. (Nasdaq:IVAC).

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