2004 AAPM Annual Meetin 1 Diagnostic Ultrasound Physics Diagnostic Ultrasound Physics and QC Workshop and QC Workshop Randell Kruger, Ph.D., Randell Kruger, Ph.D., Marshfield Clinic, Marshfield, WI Marshfield Clinic, Marshfield, WI Zhengfeng Zhengfeng Lu, Ph.D., Lu, Ph.D., Columbia Presbyterian Medical Center, New York, NY Columbia Presbyterian Medical Center, New York, NY Heather Miller, Engineer Heather Miller, Engineer CIRS Inc., Norfolk, VA CIRS Inc., Norfolk, VA