Abstract: |
Ever since Roentgenõs discovery of x-rays, more than 100 years ago, medical imaging has undergone, and continues to undergo, dramatic advances. It has become one of the important mainstays of modern medicine, indispensable for diagnosis, treatment planning and follow-up. Progress in medical imaging has been driven by the continuing increases in computer power, advances in microinstrumentation, communication technology and, lately, by the impact of molecular biology. The increase in computer power has been most impressive, even exceeding Mooreõs law of doubling the number of transactions per chip every 18 months. The fact that the price for constant computer power has decreased by the logarithmic scale has been responsible for the relative affordability of the advances in computer technology. These advances have made much of cross-sectional imaging as well as PACS and teleradiology possible. PACS has empowered many leading medical centers in the United States, Western Europe and Japan to become òfilm-lessó. Many other countries are in transition. Teleradiology promises access to sophisticated subspecialty imaging interpretation worldwide and may help in overcoming the anticipated shortage of radiologists in the industrialized world. The general forward direction of medical imaging aims toward increasing sensitivity and specificity, while decreasing invasiveness and minimizing cost. |