JP2002143164A - Ultrasonic bone evaluating instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately correct variance of reception signals in one instrument and the variance of the reception signals between the instruments with the same configuration. SOLUTION: A test signal obtained by using an ultrasonic bone evaluating instrument 10 is processed by comparison with a previously decided reference signal so as to decide a correction coefficient and the reception signals obtained by measuring a testee body such as a calcaneum are corrected by using the correction coefficient. The reception signals obtained by measuring the testee body are arithmetically processed by a frequency component and corrected based on the test signal which is obtained by using the instrument 10. The attenuation amount and the sound velocity of ultrasonic wave in the testee body are obtained by the frequency component of the reception signals after correction or a time waveform so that the state of the subject is evaluated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic bone evaluation apparatus for evaluating the state of a subject using ultrasonic waves.

[0002]

2. Description of the Related Art In an ultrasonic bone evaluation apparatus, for example, an ultrasonic wave is applied to a human calcaneus, which is a subject, and an ultrasonic wave is transmitted to the subject (calcaneus). The sound speed and attenuation of the sound wave are obtained, and the state of the subject is evaluated.

[0003]

By the way, in the ultrasonic bone evaluation apparatus, even if the reception signals obtained by measuring the same subject with the same apparatus are used, the measurement environment at the time of measuring the temperature, the atmospheric pressure, etc. There is a problem that a variation (measurement error) is generated accordingly.

[0004] On the other hand, the applicant of the present invention has disclosed Patent
No. 571 proposes an ultrasonic bone evaluation apparatus capable of correcting an error of a measured value due to an influence of a measurement environment and thereby performing accurate bone evaluation.

[0005] The ultrasonic bone evaluation apparatus disclosed in the publication discloses a pair of opposed transducer units having an ultrasonic transducer and a coupling balloon provided on the front side thereof and containing a coupling liquid. A calibration wave transmitting and receiving step of transmitting and receiving ultrasonic waves in a state where the pair of transducer units are in direct contact with each other, and a ultrasonic wave transmitting and receiving step of transmitting and receiving ultrasonic waves with the subject sandwiched between the pair of transducer units. In the ultrasonic bone evaluation apparatus in which the sample transmitting and receiving step is performed, the transmission characteristic of the apparatus is obtained based on the time waveform of the received signal obtained by performing the calibration transmitting and receiving step, and the subject transmitting and receiving step is performed. The transmission characteristics of the subject are obtained based on the time waveform of the received signal obtained by the above, the temperature of the coupling liquid in both processes is obtained by the temperature sensor, and the transmission characteristics of the apparatus are obtained based on the temperature difference between both processes. To compensate for The transmission characteristics of the body by correcting a transmission characteristic of the device after correction is obtained by to obtain the transmission characteristics of a true subject.

Thus, according to the ultrasonic bone evaluation apparatus disclosed in the publication, it is possible to obtain an accurate value in which the error of the measurement value due to the influence of the measurement environment is corrected. According to the ultrasonic bone evaluation device disclosed in the publication,
By limiting the driving force applied from the moving means of the pair of vibrator units to a predetermined value or less, the pressure acting on the coupling balloon can be made substantially equal, and more accurate measurement becomes possible. .

However, the ultrasonic bone evaluation apparatus disclosed in the above publication uses a plurality of devices having the same configuration, and receives signals obtained by measuring the same subject in accordance with individual differences between the devices. The correction of the resulting variation is not considered.
In addition, there is a need for an apparatus that can more accurately correct variations occurring between received signals obtained by measuring the same subject with the same apparatus according to the measurement environment at the time of measurement of temperature, atmospheric pressure, and the like. ing.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ultrasonic bone evaluation apparatus capable of more accurately correcting variations in received signals in the same device and variations in received signals between a plurality of devices having the same configuration. It is in.

[0009]

This and other objects are achieved by the present invention which is defined below as (1) to (10).

(1) The subject is irradiated with ultrasonic waves, and the amount of attenuation and / or the amount of ultrasonic waves in the subject is determined based on the frequency component or time waveform of the reception signal of the ultrasonic waves transmitted through the subject.
Or to determine the speed of sound, an ultrasonic bone evaluation device that evaluates the state of the subject, by performing a comparison process between a test signal obtained using the ultrasonic bone evaluation device and a predetermined reference signal. An ultrasonic bone evaluation apparatus, comprising: a correction unit that determines a correction coefficient and corrects the received signal using the correction coefficient.

(2) The ultrasonic bone evaluation apparatus according to the above (1), wherein the comparison processing is an arithmetic processing on the frequency component.

(3) The reference signal is a test signal obtained by using a plurality of ultrasonic bone evaluation apparatuses having the same configuration or a test signal obtained by using a reference ultrasonic bone evaluation apparatus. The ultrasonic bone evaluation device according to the above (1) or (2), wherein

(4) The reference signal is a signal obtained by converting a test signal obtained by using a plurality of ultrasonic bone evaluation apparatuses having the same configuration into the frequency components and averaging the test signal, or a reference ultrasonic bone. The ultrasonic bone evaluation device according to the above (2), which is a signal obtained by converting a test signal obtained by using an evaluation device into the frequency component.

(5) The apparatus according to any one of (1) to (4), further comprising a storage unit for storing the reference signal, wherein the reference signal stored in the storage unit is readable and rewritable. Ultrasonic bone evaluation device.

(6) The device according to any one of (1) to (5), wherein the correction means is configured to correct the received signal by performing an arithmetic processing on the received signal with the frequency component using the correction coefficient. Ultrasonic bone evaluation device.

(7) The apparatus according to any one of (1) to (6), further comprising a storage unit for storing the correction coefficient, wherein the correction coefficient stored in the storage unit is readable and rewritable. Ultrasonic bone evaluation device.

(8) The subject is irradiated with ultrasonic waves, and the amount of attenuation and / or the amount of attenuation of the ultrasonic waves in the subject is determined based on the frequency component or time waveform of the reception signal of the ultrasonic waves transmitted through the subject.
Or an ultrasonic bone evaluation apparatus for determining the speed of sound and evaluating the state of the subject, wherein the received signal is calculated with the frequency component based on a test signal obtained using the ultrasonic bone evaluation apparatus. An ultrasonic bone evaluation device, comprising: a correction unit that performs processing and correction.

(9) There is provided storage means for storing the test signal or a signal obtained by converting the test signal into a frequency component. The test signal or the signal obtained by converting the test signal into a frequency component is stored in the storage means. The ultrasonic bone evaluation device according to the above (8), which is readable and rewritable.

(10) The ultrasonic bone evaluation apparatus according to any one of (1) to (9), wherein the correction by the correction means includes performing a smoothing process on the received signal.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an ultrasonic bone evaluation apparatus according to the present invention.

FIG. 1 shows a first embodiment of the ultrasonic bone evaluation apparatus of the present invention.
FIG. 2 is a block diagram showing the embodiment, and FIG. 2 and FIG. 3 are flowcharts showing a control operation in the first embodiment of the ultrasonic bone evaluation device of the present invention.

The ultrasonic bone evaluation apparatus 10 shown in FIG. 1 irradiates an ultrasonic wave to a human calcaneus, for example, a subject, and based on a received signal of the ultrasonic wave transmitted through the subject (calcaneus), The measuring unit 12 measures the sound velocity and attenuation of the ultrasonic wave in the subject, evaluates the state of the subject, and measures the subject.
And a personal computer (hereinafter, referred to as a personal computer) 14 which is a control unit for controlling the operation of the measuring unit 12.

The measuring unit 12 includes a pair of transmitting and receiving vibrators 16 and 18, a transmitting unit 20 connected to the transmitting vibrator 16, and a receiving unit 22 connected to the receiving vibrator 18. , An MPU unit 24, a storage unit (storage unit) 26, an interface unit 28, and a power supply unit 34 connected to a power cable 32 via a power switch 30.

The transmission unit 20, the reception unit 22, the storage unit 26, and the interface unit 28 are connected to the MPU unit 24. The measuring unit 12 is connected to the personal computer 14 of the control unit via the interface unit 28. Although not shown, the power supply unit 34
After that, electric power is supplied to each part configuring the measuring unit 12.

The personal computer 14 has a correcting means for correcting the received signal, and a storage unit (storage means).

The control unit is not limited to the personal computer 14, and other control means having equivalent functions may be used.

Next, the operation (operation) of the ultrasonic bone evaluation apparatus 10 will be described. In the ultrasonic bone evaluation apparatus 10, before measuring the subject, a correction coefficient for correcting the variation of the ultrasonic reception signal obtained by measuring the subject is calculated and stored in the storage unit 26 of the measuring unit 12. It is memorized. The step of calculating this correction coefficient and storing it in the storage unit 26 may be performed before each object is measured, or may be performed before measuring a plurality of objects, for example, every time the object is measured. It may be performed once a day.

When calculating the correction coefficient, as shown in the flowchart of FIG. 2, the user (operator) of the ultrasonic bone evaluating apparatus 10 uses the pair of vibrators 1 of the measuring unit 12.
6 and 18 are brought into direct contact with each other (step S101), and an instruction to start measurement is given via a program running on the personal computer 14. The pair of transducers 16 and 18 may not be in direct contact with each other, but a phantom, which is a member to be measured, may be interposed between them.

When the measurement section 12 receives a measurement start instruction from the personal computer 14, under the control of the MPU section 24, ultrasonic waves are emitted from the transmitting transducer 16 via the transmission unit 20 (step S 102). Vibrator 18 for
(Step S103). When a phantom is sandwiched between the pair of transducers 16 and 18, the ultrasonic wave transmitted through the phantom is received by the receiving transducer 18. The ultrasonic test signal (time waveform) received by the receiving transducer 18 is transmitted to the receiving unit 22 via the receiving unit 22.
The data is transmitted to the PU unit 24 and transmitted from the MPU unit 24 to the personal computer 14 via the interface unit 28.

When the personal computer 14 receives the test signal from the measuring section 12, the test signal is subjected to a smoothing process to remove unnecessary frequency components such as high-frequency components including noise (step S104).

Subsequently, the test signal is converted to a frequency component X1 (ω) by Fourier transform (step S10).
5).

Thereafter, the frequency component X1 of the test signal
(Ω) is compared with the reference signal S (ω), and the error between the two is corrected by the following formula (1) so that the frequency component X1 (ω) of the test signal becomes the reference signal S (ω). The correction coefficient C1 (ω) is calculated (Step S106). C1 (ω) = S (ω) / X1 (ω) (1)

Here, the reference signal S (ω) may be a signal obtained by converting test signals obtained by using a plurality of ultrasonic bone evaluation apparatuses having the same configuration into frequency components and averaging them as described above. Good or a standard ultrasonic bone evaluation device (for example,
A signal obtained by converting a test signal obtained by using one of a plurality of ultrasonic bone evaluation apparatuses having the same configuration into a frequency component may be used, or a signal similar to these signals may be used. .

This reference signal S (ω) is obtained in advance by measurement and stored in a storage unit built in the personal computer 14. The reference signal S (ω) can be read and rewritten.

The correction coefficient C1 calculated by the personal computer 14
(Ω) is transmitted to the measurement unit 12 and stored in the storage unit 26 via the interface unit 28 and the MPU unit 24 (Step S107).

The correction coefficient C stored in the storage unit 26
1 (ω) can be read out and rewritten to the personal computer 14 under the control of the above-described program on the personal computer 14 side.

When measuring the state of the subject, FIG.
As shown in the flowchart, the measurement is performed with the calcaneus portion, which is the subject, sandwiched between the pair of transducers 16 and 18 of the measurement unit 12.

That is, ultrasonic waves are irradiated from the transmitting transducer 16 to the calcaneus portion as the subject (step S20).
1) The ultrasonic wave transmitted through the calcaneus is transmitted to the transducer 18 for reception.
(Step S202).

Next, the received ultrasonic signal (time waveform) obtained by measuring the subject is smoothed (step S203), and the frequency component X2 is obtained by Fourier transform.
(Ω) (step S204).

Thereafter, the frequency component X2 (ω) of the received signal
Is corrected using the correction coefficient C1 (ω) stored in the storage unit 26 according to the following calculation formula (2), and the corrected received signal Y1 (ω) is obtained (step S205). Y1 (ω) = X2 (ω) · C1 (ω) or = X2 (ω) / C1 (ω) (2)

Then, parameters such as the amount of attenuation of the ultrasonic wave are calculated based on the frequency characteristics of the corrected received signal Y1 (ω), and the state of the calcaneus as the subject is presented. Alternatively, the corrected received signal Y1 (ω) is subjected to inverse Fourier transform to be converted into a time waveform, and parameters such as the half width (attenuation) of the first maximum value of the ultrasonic wave and the speed of sound are calculated. The state of the calcaneus may be presented.

In the first embodiment, it is possible to accurately correct the variation of the received signal among a plurality of devices having the same configuration based on the correction coefficient calculated by comparing the test signal and the reference signal. Thereby, an accurate measurement value is obtained, and the state of the subject can be accurately evaluated.

Therefore, it is effective to apply the first embodiment to a case where the variation of the received signal between the devices is large.

Next, a second embodiment will be described. FIGS. 4 and 5 are flowcharts showing the control operation in the second embodiment of the ultrasonic bone evaluation device of the present invention.

Hereinafter, the ultrasonic bone evaluation apparatus 1 according to the second embodiment will be described.
0 will be described focusing on the differences from the first embodiment described above, and the description of the same items will be omitted.

Since the second embodiment differs from the first embodiment only in that a test signal is used as a correction coefficient instead of using a reference signal, the procedure will be briefly described below. .

That is, when calculating the correction coefficient, as shown in the flowchart of FIG. 4, for example, after the pair of vibrators 16 and 18 of the measuring section 12 are brought into direct contact with each other (step S301), the vibration for transmission is transmitted. Ultrasonic waves are emitted from the transducer 16 (step S302), and the receiving transducer 18
(Step S303).

The test signal received by the receiving oscillator 18 is transmitted to the personal computer 14 and subjected to a smoothing process (step S304). The test signal is converted into a frequency component by Fourier transform to obtain a correction coefficient C2 (ω) (step S304). S
305). Then, the correction coefficient C2 (ω) is
2 and stored in the storage unit 26 (step S3
06).

When measuring the state of the subject, FIG.
As shown in the flowchart, after the calcaneus portion, which is the subject, is sandwiched between the pair of transducers 16 and 18 of the measurement unit 12, ultrasonic waves are applied to the calcaneus portion from the transmitting transducer 16 ( In step S401, the ultrasonic wave transmitted through the calcaneus is received by the receiving transducer 18 (step S40).
2).

The received signal obtained by measuring the subject is subjected to smoothing processing (step S403), and is converted into a frequency component X3 (ω) by Fourier transform (step S404).

Thereafter, the frequency component X3 (ω) of the received signal
Is corrected using the correction coefficient C2 (ω) according to the following formula (3), and the corrected received signal Y2 (ω) is obtained (step S405). Y2 (ω) = X3 (ω) / C2 (ω) (3)

Then, parameters such as the amount of attenuation of the ultrasonic wave are calculated based on the frequency characteristics of the corrected received signal Y2 (ω), and the state of the calcaneus as the subject is presented. Alternatively, the corrected received signal Y2 (ω) is converted into a time waveform by performing an inverse Fourier transform, and parameters such as a half-value width (attenuation) of the first maximum value of the ultrasonic wave and a sound velocity are calculated. The state of the calcaneus may be presented.

In the second embodiment, the test signal is used as a correction coefficient to accurately correct the variation of the received signal in the same device, whereby an accurate measurement value is obtained and the state of the subject is accurately evaluated. can do.

Therefore, it is effective to apply the second embodiment to a case where the variation of the received signal between a plurality of devices is small and the variation of the received signal of the same device is large.

Next, a third embodiment will be described. 6 and 7 are flowcharts showing a control operation in the third embodiment of the ultrasonic bone evaluation device of the present invention.

Hereinafter, the ultrasonic bone evaluation apparatus 1 according to the third embodiment will be described.
0 will be described focusing on the differences from the first and second embodiments described above, and the description of the same items will be omitted.

In the third embodiment, both the correction coefficient C1 (ω) calculated in the first embodiment and the correction coefficient C2 (ω) calculated in the second embodiment are used. The procedure is briefly described below.

The procedure for calculating the correction coefficients C1 (ω) and C2 (ω) is as shown in the flowcharts of FIGS. These correction coefficients C1 (ω) and C2 (ω) are both stored in the storage unit 26.

When measuring the state of the subject, the received signal obtained by measuring the subject is, for example, a correction coefficient C2
(Ω), and subsequently, the correction coefficient C1 (ω)
And the corrected received signal Y3 (ω) is obtained.

That is, as shown in the flow chart of FIG. 6, after the calcaneus portion, which is the subject, is sandwiched between the pair of vibrators 16 and 18 of the measuring section 12, the transmission oscillating member 16 and the calcaneus portion Is irradiated (step S501), and the ultrasonic wave transmitted through the calcaneus is received by the receiving transducer 18 (step S502).

The received signal obtained by measuring the subject is subjected to a smoothing process (step S503), and is converted into a frequency component by Fourier transform (step S50).
4).

Thereafter, the frequency component of the received signal is corrected by using the correction coefficient C2 (ω) according to the above-mentioned equation (3) (step S505), and subsequently, the correction coefficient C1 is calculated according to the above-mentioned equation (2). The correction is performed using (ω) (step S505), and the corrected received signal is obtained.

Then, parameters such as the amount of attenuation of the ultrasonic wave are calculated based on the corrected frequency characteristics of the received signal, and the state of the calcaneus as the subject is presented. Alternatively, the received signal after the correction is converted into a time waveform by performing an inverse Fourier transform, and parameters such as a half value width (attenuation amount) of the first maximum value of the ultrasonic wave and a sound velocity are calculated, and the state of the calcaneus as the subject is calculated. May be presented.

When measuring the state of the subject, as shown in the flowchart of FIG. 7, the correction coefficient C3 (ω) obtained from the correction coefficients C1 (ω) and C2 (ω) is used.
The received signal obtained by measuring the subject may be corrected using (ω).

The correction coefficient C3 (ω) is calculated by the following equation (4).
Thus, the correction coefficient C1 (ω) and the correction coefficient C2 (ω) are used for calculation and are stored in the storage unit 26. The procedure for calculating the correction coefficients C1 (ω) and C2 (ω) is as shown in the flowcharts of FIGS. C3 (ω) = C1 (ω) / C2 (ω) or = 1 / C1 (ω) · C2 (ω) (4)

In measuring the state of the subject, the received signal obtained by measuring the subject is corrected using the correction coefficient C3 (ω), and the corrected received signal Y3 (ω) is obtained.

That is, as shown in the flow chart of FIG. 7, after the calcaneus portion, which is the subject, is sandwiched between the pair of transducers 16 and 18 of the measuring section 12, the transmission transducer 16 is moved from the calcaneus portion. Is irradiated (step S601), and the ultrasonic wave transmitted through the calcaneus is received by the receiving transducer 18 (step S602).

The received signal obtained by measuring the subject is subjected to a smoothing process (step S603), and is converted to a frequency component X1 (ω) by Fourier transform (step S604).

Thereafter, the frequency component X1 (ω) of the received signal
Is corrected using the correction coefficient C3 (ω) according to the following formula (5), and the corrected received signal Y3 (ω) is obtained (step S605). Y3 (ω) = X1 (ω) · C3 (ω) (5)

Then, parameters such as the amount of attenuation of the ultrasonic wave are calculated based on the frequency characteristic of the corrected received signal Y3 (ω), and the state of the calcaneus as the subject is presented (step S606). Alternatively, the corrected received signal Y3 (ω) is subjected to inverse Fourier transform to be converted into a time waveform, and parameters such as a half-width (attenuation) of the first maximum value of the ultrasonic wave and a sound velocity are calculated. The state of the calcaneus may be presented.

When measuring the state of the subject,
According to the calculation formula (4), the correction coefficient C3 (ω) is calculated by performing an arithmetic operation on the correction coefficients C1 (ω) and C2 (ω), and the subject is determined using the correction coefficient C3 (ω). The received signal obtained by the measurement may be corrected. In this case, the correction coefficients C1 (ω) and C2 (ω) calculated before the measurement of the state of the subject are stored in the storage unit 26.

In the third embodiment, the variation in the received signal in the same device and the variation in the received signal between a plurality of devices having the same configuration are accurately corrected, whereby an accurate measured value is obtained. The state of the subject can be accurately evaluated.

The present invention has been described based on the illustrated embodiments. However, the present invention is not limited to these embodiments, and the configuration of each unit may be replaced with any configuration having the same function. can do.

[0074]

As described above, according to the present invention,
Variations in received signals in the same device can be corrected more accurately, and bone evaluation can be performed accurately.

Further, it is possible to more accurately correct the variation of the received signal among a plurality of devices having the same configuration, and to accurately perform the bone evaluation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of an ultrasonic bone evaluation device of the present invention.

FIG. 2 is a flowchart showing a control operation in the first embodiment of the ultrasonic bone evaluation device of the present invention.

FIG. 3 is a flowchart showing a control operation in the first embodiment of the ultrasonic bone evaluation device of the present invention.

FIG. 4 is a flowchart showing a control operation in a second embodiment of the ultrasonic bone evaluation device of the present invention.

FIG. 5 is a flowchart showing a control operation in a second embodiment of the ultrasonic bone evaluation device of the present invention.

FIG. 6 is a flowchart showing a control operation in a third embodiment of the ultrasonic bone evaluation device of the present invention.

FIG. 7 is a flowchart showing a control operation in a third embodiment of the ultrasonic bone evaluation device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ultrasonic bone evaluation apparatus 12 Measurement part 14 Personal computer 16, 18 Transducer 20 Transmission unit 22 Receiving unit 24 MPU part 26 Storage part 28 Interface part 30 Power switch 32 Power supply cable 34 Power supply part S101-S107 Step S201-S206 Step S301 Steps S401 to S406 Steps S501 to S507 Steps S601 to S606 Step

Claims (10)

[Claims] An object is irradiated with an ultrasonic wave, and an attenuation and / or a sound speed of the ultrasonic wave in the object are obtained from a frequency component or a time waveform of a reception signal of the ultrasonic wave transmitted through the object, and An ultrasonic bone evaluation apparatus for evaluating the state of a sample, wherein a correction coefficient is determined by comparing a test signal obtained using the ultrasonic bone evaluation apparatus with a predetermined reference signal, An ultrasonic bone evaluation apparatus, comprising: a correction unit that corrects the received signal using a correction coefficient. 2. The ultrasonic bone evaluation device according to claim 1, wherein the comparison process is a calculation process using the frequency component. 3. The test signal obtained by using a plurality of ultrasonic bone evaluation devices having the same configuration, or the reference signal,
The ultrasonic bone evaluation device according to claim 1, wherein the test signal is a test signal obtained using the ultrasonic bone evaluation device serving as a reference. 4. The reference signal is a signal obtained by converting a test signal obtained by using a plurality of ultrasonic bone evaluation apparatuses having the same configuration into the frequency components and averaging the test signal, or an ultrasonic bone evaluation used as a reference. 3. The ultrasonic bone evaluation device according to claim 2, wherein the test signal is a signal obtained by converting a test signal obtained by using the device into the frequency component. 5. The ultrasonic bone evaluation according to claim 1, further comprising a storage unit for storing the reference signal, wherein the reference signal stored in the storage unit is readable and rewritable. apparatus. 6. The ultrasonic bone according to claim 1, wherein said correction means is configured to correct the reception signal by performing arithmetic processing on the frequency component using the correction coefficient. Evaluation device. 7. The ultrasonic bone evaluation according to claim 1, further comprising a storage unit configured to store the correction coefficient, wherein the correction coefficient stored in the storage unit is readable and rewritable. apparatus. 8. An object is irradiated with an ultrasonic wave, an attenuation amount and / or a sound velocity of the ultrasonic wave in the object are obtained from a frequency component or a time waveform of a reception signal of the ultrasonic wave transmitted through the object, and An ultrasonic bone evaluation device that evaluates a state of a sample, and a correction unit that performs arithmetic processing on the received signal with the frequency component based on a test signal obtained using the ultrasonic bone evaluation device and corrects the received signal. An ultrasonic bone evaluation device, comprising: 9. A storage unit for storing the test signal or a signal obtained by converting the test signal into a frequency component, wherein the test signal stored in the storage unit or the signal obtained by converting the test signal into a frequency component is: 9. The ultrasonic bone evaluation device according to claim 8, wherein the ultrasonic bone evaluation device can read and rewrite. 10. The ultrasonic bone evaluation apparatus according to claim 1, wherein the correction performed by the correction unit includes performing a smoothing process on the received signal.