医学超声动态图象的分区压缩技术

The Part Area Compression Technique for Medical Ultrasound Dynamic Images

介绍了医学超声动态图象微小失真压缩研究中采用的分区压缩技术．它根据超声诊断临床经验和图象特征，将超声动态图象划分为病灶、结构图象区域及背景等图象．对病灶区域进行低压缩率的微小失真压缩，对结构图象区域的图象进行高压缩率的有损压缩，对背景则采取简单定时的游程编码压缩．实验证明它可提高超声动态图象的数据压缩比和降低计算运算量。

The Part Area Compression Technique for the lower distortion compression of medical ultrasound dynamic images is introduced. According to the diagnostic experiences and the characteristics of ultrasound image, the ultrasound image is divided into several areas, i.e. the area of focus of a disease, the constructional area and the background area. The compression method with lower distortion and lower compression rate is used for the area of focus of a disease; the compression method with distortion and higher compression rate is used for the constructional area, while the simple runlength limited encode method is used for the background area timing. Experiments show that it can increase the compression rate of ultrasound image and decrease the amount of calculation with same quality of image.