D Pfeiffer*1, Z Lu*2, H Miller*3, R Spaulding*4, W Moore*5, (1) Boulder Community Foothills Hospital, Boulder, CO, (2) Columbia Presbyterian Medical Center, New York, NY, (3) Computerized Imaging Ref Systems, Inc, Norfolk, VA, (4) ATS Laboratories, Bridgeport, CT, (5) Sonora Medical Systems, Longmont, CO