Local Activity Levels Guided Adaptive Scan Conversion Algorithm

Digital scan converter in ultrasound machine prepares data in display buffer for displaying ultrasonic echo signals on monitor with interpolating missed pixel values. The popular bilinear interpolation and bicubic interpolation in scan conversion blurred image edges and detail regions. An adaptive scan conversion algorithm was proposed with applying warped distance interpolation to enhance image edges. And local activity level threshold distinguished smooth regions from detail regions to preserve sharpness in smooth regions. Simulation result indicated that result ultrasound images were superior to other common algorithms.