According to a study by Business Communications Co. (Norwalk, CT), the total US market for diagnostic imaging products is growing at an average annual growth rate (AAGR) of 5.9% from 1999 to 2004. With sales estimated at $4 billion in 1999, diagnostic imaging is expected to generate almost $5.4 billion in 2004. X-ray systems dominate the market in terms of growth and revenue with a 7.8% AAGR and a 47.7% market share. Digital systems are experiencing a 23% AAGR. Together, computed tomography and ultrasound systems are projected at a 4.1% AAGR, with nuclear medicine trailing at a 3.4% AAGR