Ultrasound detecting device having function of confirming irradiation position, and method thereof

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.

2. The ultrasound detecting device according to claim 1 , wherein

the high-frequency component and the low-frequency component of the frequency to be used in said analysis program is selected from two types of bands, that is, a central frequency of a transmission ultrasound wave and the band in the vicinity thereof and a second peak frequency and the band in the vicinity thereof.

3. The ultrasound detecting device according to claim 1 , wherein

the high-frequency component and the low-frequency component to be used in said analysis program are maximum values in a band of 1.5±0.1 MHz and a band of 1.2±0.1 MHz.

4. The ultrasound detecting device according to claim 1 , wherein

said determination program makes determination by comparison between the analysis result in said analysis program and a numerical value set in advance.

5. The ultrasound detecting device according to claim 1 , wherein

said determination program makes determination by comparison between the highest voltage in the reflective wave and a numerical value set in advance.

6. The ultrasound detecting device according to claim 1 , wherein

when a plurality of reflective waves are obtained at successively different irradiation angles at one installed position of the ultrasound wave irradiation transducer or at successively different positions on the body surface, said display displays time information, voltage or a ratio between the high-frequency component and the low-frequency component in the frequency included in each of the plurality of reflective waves in color cells of the corresponding time and angles in accordance with numerical values on a map indicating the time information on the vertical axis and the angle on the lateral axis.

7. The ultrasound detecting device according to claim 6 , wherein

if said numerical value exceeds said numerical value set in advance, there are a plurality of angles detected to be highly likely to be the target, and they are set to a target angle range, an angle optimal for treatment is at the center of said target angle range.

8. The ultrasound detecting device according to claim 1 , wherein

said ultrasound wave irradiation transducer also works as said signal receiving transducer.

9. The ultrasound detecting device according to claim 1 , wherein

said ultrasound detecting device detects a bone as a target.

10. The ultrasound detecting device according to claim 1 , wherein

said ultrasound detecting device detects a tumor/or a degenerated tissue within the body as the target.

11. The ultrasound detecting device according to claim 1 , wherein

said ultrasound detecting device is integrated with an ultrasound treatment instrument.

12. The ultrasound detecting device according to claim 1 , wherein

a cured state of the target is determined on the basis of temporal change of said stored signal, said analysis result or the determination result by said determination program at the same irradiation position.