To quantitatively determine temporal changes of the condition in a shunt.
An input section 110 receives the sound of blood flowing in a shunt from a sound collector, and an image generation means 120 creates an wavelet image by changing the signals of the blood flow sound received by the input section 110 by wavelet transform. In addition, a periodic detection means 130 detects one period corresponding to one heartbeat from the signals of the blood flow sound received by the output section 110. A clipping means 140 clips a period of wavelet images, and an image storage means 150 stores the period of the clipped image relating to a patient. When a processing means 160 receives images from the clipping means 140, the images of the patient stored in the image storage means 150 are read out, the images are processed to match the period of one of the images with that of the other image, and a calculation means 170 calculates the correlation of both the images.
TAKASAKI SHINJIRO
KAWASHIMA NORIMICHI
SATO TOSHIO
AGISHI TETSUZO
AKAMATSU MAKOTO
TOIN GAKUEN
| JP2003225218A | 2003-08-12 | |||
| JP2005040518A | 2005-02-17 |
Daisuke Takahashi
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