#$%^&*AU2008203363B220130228.pdf#####ABSTRACT OF THE DISCLOSURE According to this invention, an ultrasound diagnostic apparatus is provided which generates a tomographic image 5 of a subject site in a living body, including a region-ofinterest setting section which sets a region-of-interest in the tomographic image, a data acquiring section which samples, from one piece of sound ray data within the region-of-interest, pieces of data at at least two 10 positions including a piece of data at one position included in the one piece of sound ray data and a piece of data a: at least one position upwardly or downwardly spaced apart from the one position by an interval of a predetermined number of pixels in a depth direction of the 15 one piece of sound ray data, and a blood flow data calculating section which calculates a piece of blood flow data al: the one position by performing spatial averaging on the pieces of data sampled by the data acquiring section. 20 N: Melbourne Case Patent 78000-78999 P78516.AU Specis P78516.AU gh speci.doc 28/07/080/L 0 0 z zu') CI -- (50 z z lO z-z C/C.). C') 0.0. WI-0 S~Z 0 LLLL U)3 0~0 0c0 WLC,- <；U)<； a0 CO
