Patent ID: 9177400
Filing Date: 2015-11-03
Classification: A61B,G06T

Abstract:
1. A non-transitory computer readable medium storing a program for determining vascular disease in a subject, the program when executed causes a processor to perform the steps of: (1) obtaining a wavelet spectrum by performing a discrete wavelet transform on a waveform of a reflected echo that is obtained by transmitting ultrasonic waves to beating blood vessels of a subject; (2) performing mode decomposition of the wavelet spectrum obtained by the step (1) to obtain a plurality of spectrums classified by mode; (3) performing an inverse wavelet transform on the plurality of classified-by-mode spectrums obtained by the step (2) to obtain a plurality of corresponding waveforms classified by mode; (4) calculating, from the plurality of classified-by-mode waveforms obtained by the step (3), a plurality of corresponding norm values; (5) outputting a norm distribution graph by plotting the plurality of norm values calculated by the step (4) for each of corresponding modes; (6) comparing the norm distribution graph output by the step (5) with a norm distribution graph obtained from a normal individual to detect that the norm distribution graphs match, or differ from, each other; and (7) determining that the subject has vascular disease in the case where a difference between the norm distribution graphs is detected by the step (6).