Patent ID: 8323197

Claim:
An ultrasonic measuring system comprising: an ultrasonic radiation unit for radiating a test specimen with an ultrasonic signal; a reception unit configured to receive an ultrasonic response from said test specimen; an image data processing unit configured to produce a plurality of pieces of image data based on the ultrasonic response received by said reception unit; a pressure applying unit configured to apply pressure to said test specimen, a signal selecting unit configured to extract image data including a first image and a second image from the image data produced with the image data processing unit, wherein each of the first and second images represents an area of blood flow which occupies an inside of a venous blood vessel of said test specimen; a calculating unit configured to perform a Fourier transform respectively on the image data of the first image representing the said area of the blood flow in a pressed state in which a pressure is applied on the blood vessel to stop the blood flow and on the image data of the second image representing the area of the blood flow immediately after the pressure is released; and an evaluation unit configured to evaluate blood flow velocity of said specimen based on a difference between a skirt portion at a high frequency side of a first spatial frequency distribution which is represented in a first Fourier transform result for the image data of the first image and a skirt portion at a high frequency side of a second spatial frequency distribution which is represented in a second Fourier transform result for the image data of the second image.