Patent ID: 9301729
Filing Date: 2016-04-05
CPC Classification: A61B,A61N

Claim Text:
1. An ultrasound detecting device which detects an ultrasound irradiation position by irradiating an ultrasound pulse to a living body, comprising: one or a plurality of ultrasound wave irradiation transducers which transmit ultrasound waves and one or a plurality of signal receiving transducers which receive reflective waves of the ultrasound waves irradiated from said ultrasound wave applying transducers; signal storage which stores a received signal received by said signal receiving transducers; an analysis program for analyzing a stored signal stored by said signal storage; a determination program for determining whether or not an obtained reflective wave is obtained from a target of ultrasound wave irradiation by using an analysis result by said analysis program or the stored signal; and a display which displays one or more selected from a group consisting of said stored signal, said analysis result, and said determination result by said determination program, wherein said analysis program calculates a ratio between a high-frequency component and a low-frequency component of the frequency in the received signal of the obtained reflective wave, and said analysis program or said determination program makes analysis or determination by using the fact that a frequency or voltage parameter of the received signal is different depending on a difference of a reflector within the living body, wherein said analysis program makes analysis by using a difference in intensity distribution of a frequency component of the reflective wave caused by a bone characteristic that the high-frequency component included in the propagating ultrasound waves attenuates more than in a soft tissue, wherein in said analysis program, at least one range of time selected from the group consisting of a range of time for analyzing the received signal, a range of time for storing the received signal and a range of time for determination by the determination program is determined by a time range setting program set in advance, wherein said time range setting program takes an envelope line of a voltage of a reflection signal, and with regard to a waveform of the envelope line having a value of a voltage A or more at the top, a point at which the voltage returns to a voltage C when inclination of an envelope line at a voltage B is positive is set to be a detection start time, a relationship of A ≧B>C holds for A, B, and C, and a certain time interval starting at the detection start time is set as an analysis target range, and wherein said time range setting program takes, in a limb section, a ratio of a distance from a point on a limb periphery to a bone directly below to the limb periphery (distance/periphery), for a plurality of individuals a coefficient is set to ((average value of said ratio of the plural individual data) ± (k × standard deviation)), and when a limb periphery of a subject is obtained, a twofold number of a distance range determined by a method for predicting the distance range from the point on the periphery to the bone directly below by multiplying said limb periphery of the subject by said coefficient is divided by a sound speed in the soft tissue so as to determine the time interval, which is set to an analysis target range.