KR101171852B1 - Bone density measurement device using temperature compensation - Google Patents

Bone density measurement device using temperature compensation Download PDF

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KR101171852B1
KR101171852B1 KR1020120000820A KR20120000820A KR101171852B1 KR 101171852 B1 KR101171852 B1 KR 101171852B1 KR 1020120000820 A KR1020120000820 A KR 1020120000820A KR 20120000820 A KR20120000820 A KR 20120000820A KR 101171852 B1 KR101171852 B1 KR 101171852B1
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bone density
temperature
unit
value
measured
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KR1020120000820A
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Korean (ko)
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안영복
윤귀영
김재진
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주식회사 오스테오시스
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0875—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/5292—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves using additional data, e.g. patient information, image labeling, acquisition parameters

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  • Heart & Thoracic Surgery (AREA)
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  • Orthopedic Medicine & Surgery (AREA)
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  • Ultra Sonic Daignosis Equipment (AREA)
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Abstract

Bone density measuring apparatus using the temperature compensation of the present invention, the thermometer is installed on one side of the bone density measuring device to measure the room temperature; A temperature input unit which provides a room temperature measured by the thermometer to a daily test unit and a patient measurement unit; And a memory unit in which a first table measuring bone density of the phantom according to temperature and a second table representing an error value generated according to temperature in a mean value of bone density of normal people; When the first indoor temperature is provided by the temperature input unit, the bone density of the phantom coated with ultrasonic gel is measured, and the bone density measured value of the phantom is subtracted from the measured value corresponding to the input first indoor temperature of the first table. A daily test unit providing a difference value; When the second room temperature is provided by the temperature input unit, the bone density of the patient is measured, and the resultant value obtained by subtracting an error value corresponding to the input second room temperature of the second table from the measured patient bone density measurement value. Providing patient measuring unit; And a bone density calculation unit for calculating a final bone density value obtained by subtracting the difference value provided by the daily test unit from the result value provided by the patient measuring unit. Diagnostic unit comprising a; It includes.

Description

Bone density measurement device using temperature compensation {.}

The present invention relates to a device for measuring bone density using temperature compensation, and more specifically, to measure the bone density of the phantom when starting to use the measuring device to obtain a difference value depending on the temperature, and to measure the bone density of the patient measured according to the temperature. The present invention relates to a device for measuring bone density using temperature compensation that can accurately calculate a patient's bone density by subtracting the difference from the result.

In general, osteoporosis is a disease in which bone fractures become thin and weak due to bone loss, and fractures are easily caused by small impacts. In postmenopausal women, those who have bone loss due to smoking and drinking, the elderly, and malnutrition It is a disease that can easily occur in people with calcium deficiency.

In addition, osteoporosis comes first without symptoms and progresses slowly, eventually leading to severe pain and fractures.

At this time, osteoporosis is an irreversible disease that cannot be returned to its normal state once it is developed. As a preventive diagnosis is important, as long as the bone loss is found early, it can be sufficiently prevented.

In addition, fractures frequently caused by osteoporosis are the spine, thighs, wrists, etc. In the elderly, fractures of these areas can be life-threatening. Today, osteoporosis is a serious social problem. It is estimated that more than 2 million people in Korea are suffering from osteoporosis, and in the United States there are already 7 to 8 million people with osteoporosis and 17 million people are at risk of developing osteoporosis with low bone mass. There is a risk of fracture.

Accordingly, there is an increasing demand for the development of an osteoporosis diagnostic apparatus that can accurately diagnose osteoporosis in advance.

Recently, bone density is measured through an ultrasonic bone density meter.

Ultrasonic Bone Mineral Density Analyzer is based on the time of flight (TOF) and the change in the amplitude of the ultrasonic wave due to the energy loss caused by the characteristics of the permeable medium (elasticity, density, porosity, homogeneity). A device for evaluating bone density using attenuation due to a difference in acoustic impedance at an incident interface and attenuation due to scattering and absorption in a medium to be transmitted.

However, after the ultrasonic bone density meter described above is produced, the characteristics of the product change over time.

That is, as the characteristics of the ultrasonic bone density meter change, the bone density value measured by the meter itself changes, and the wrong bone density value is calculated.

In addition, after installing the ultrasonic bone density meter in any one place, there was a problem that the bone density value is not measured accurately due to the temperature change of the equipment according to the temperature change of the installation site.

In particular, when the patient is measured, there is a problem in that an incorrect bone density value is calculated because a measurement value of bone density changes with temperature change despite being normal, and the doctor has a bone density according to the current temperature in the incorrectly calculated bone density measurement value. There was a difficulty to calibrate to the measured value.

An object of the present invention devised to solve the above problems is to obtain a difference value generated in the device when the bone density is measured according to the temperature change of the measuring device, and to determine the temperature change when the bone density of the patient is measured. By calculating the result value by subtracting the error value, and calculating the patient's bone mineral density value using the result value and the difference value, the error can be reduced as much as possible to compensate for the error caused by the temperature change in the device and the patient. In order to provide a device for measuring bone density using temperature compensation.

In addition, another object of the present invention, by measuring the bone density of the patient using the data shown in the first table and the second table, the bone density measured in accordance with the change in the device temperature when checking the measurement device or measuring the bone density of the patient The purpose of the present invention is to provide an apparatus for measuring bone density using temperature compensation, which can reduce the error of the value and accurately measure and expect a more reliable measurement result.

According to a feature of the present invention for achieving the above object, the bone density measuring apparatus using the temperature compensation of the present invention, the thermometer is installed on one side of the bone density measuring apparatus to measure the room temperature; A temperature input unit which provides a room temperature measured by the thermometer to a daily test unit and a patient measurement unit; And a memory unit in which a first table measuring bone density of the phantom according to temperature and a second table representing an error value generated according to temperature in a mean value of bone density of normal people; When the first indoor temperature is provided by the temperature input unit, the bone density of the phantom coated with ultrasonic gel is measured, and the bone density measured value of the phantom is subtracted from the measured value corresponding to the input first indoor temperature of the first table. A daily test unit providing a difference value; When the second room temperature is provided by the temperature input unit, the bone density of the patient is measured, and the resultant value obtained by subtracting an error value corresponding to the input second room temperature of the second table from the measured patient bone density measurement value. Providing patient measuring unit; And a bone density calculation unit for calculating a final bone density value obtained by subtracting the difference value provided by the daily test unit from the result value provided by the patient measuring unit. Diagnostic unit comprising a; The first table is characterized in that the normal bone density values of the phantom to be measured according to the temperature, the second table, based on the average value calculated by measuring the bone density of normal people at any one temperature And an error value in which the average value and an error occur according to a temperature when measuring bone density. The temperature input unit may include an input button provided at one side of the bone density measuring apparatus when the thermometer is a digital thermometer. When pressed, the temperature measured by the digital thermometer is provided to the daily test unit and the patient measuring unit, and when the thermometer is an analog thermometer, the temperature input from the user is provided to the daily test unit and the patient measuring unit. .

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According to the present invention as described above, when the bone density is measured according to the temperature change of the measuring device, the difference value generated in the device is obtained, and when the bone density of the patient is measured, the result of subtracting the error value generated according to the temperature change BMD measurement device using temperature compensation that can reduce the error to the maximum by precisely compensating for errors caused by temperature changes in the device and patient by calculating the value and calculating the patient's bone density value using the result value and the difference value Can be provided.

Further, according to the present invention, by measuring the bone density of the patient using the data shown in the first table and the second table, when the inspection of the measuring device or measuring the bone density of the patient, the bone density value measured according to the change in the device temperature It is possible to provide an apparatus for measuring bone density using temperature compensation that can reduce errors and accurately measure and expect more reliable measurement results.

1 is a perspective view showing an apparatus for measuring bone density using temperature compensation according to a preferred embodiment of the present invention,
2 is a block diagram showing an apparatus for measuring bone density using temperature compensation according to a preferred embodiment of the present invention,
Figure 3 is a flow chart showing a method for measuring the bone density of the phantom in the bone density measuring apparatus using the temperature compensation according to an embodiment of the present invention,
Figure 4 is a flow chart illustrating a method for measuring the bone density of the patient in the bone density measuring apparatus using the temperature compensation according to an embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining a bone density measuring apparatus using temperature compensation according to embodiments of the present invention.

Bone density measurement apparatus 100 through the temperature compensation according to a preferred embodiment of the present invention is the body 110, scaffolding 111, measuring position variable member 112, calf support 113, thermometer 115 and diagnostics The unit 200 is included.

1 is a perspective view showing the bone density measuring apparatus 100 using the temperature compensation according to a preferred embodiment of the present invention.

Referring to FIG. 1, in order to measure a bone density of a foot of a subject (a patient), the main body 110 has a space in which a foot of the subject is accommodated, and ultrasonic measurement is performed at both sides of the space. The portions 114 are provided to face each other.

The ultrasonic measuring unit 114 is an ultrasonic transducer that transmits ultrasonic waves to the heel of the subject, and the ultrasonic transducer is widely installed in a general bone density measuring apparatus. The description will be omitted.

And, the bone density measurement position, the heel of the subject's foot is located between the ultrasonic measuring unit 114 is installed opposite to each other, the position of the foot of the subject to be located in this way becomes a position for measuring the bone density of the foot will be.

It is preferable that the footrest part 111 is provided in one side surface of the upper part of the main body 110 so that the angle of a foot and the ground may be 30-50 degrees.

The measuring position variable member 112 is formed to surround the heel and the achilles tendon of the foot positioned at the measuring position.

The calf pedestal 113 is rotatably installed on one side of the body 110 by a hinge (not shown), and when the bone density is not measured, the calf pedestal 113 can be rotated and closed to easily store or move. .

In addition, it is preferable that one surface of the calf pedestal 113, ie, a portion on which the calf of the subject is placed, is formed to be concave so as to correspond to the shape of the calf of the person.

Then, when the subject is placed in the measurement position, and the calf is placed on the concave portion of the calf pedestal 113, the position of the foot and the calf at the measurement position are fixed in a straight line.

Thermometer 115 is installed on one side of the bone density measuring apparatus 100 to measure the room temperature.

The temperature input unit (not shown) provides the temperature measured by the thermometer to the daily test unit and the patient measurement unit.

In addition, when the thermometer is a digital thermometer, when the input button (not shown) installed on one side of the bone density measuring apparatus 100 is pressed, the temperature input unit provides a temperature measured by the digital thermometer to the daily test unit and the patient measuring unit.

On the other hand, when the thermometer is an analog thermometer, the temperature input unit provides a temperature input from the user to the daily test unit and the patient measurement unit.

In particular, when the thermometer is an analog thermometer, when the user inputs the temperature measured by the analog thermometer to the terminal through the terminal electrically connected to the bone density measuring apparatus 100, the information of the input temperature is received at the temperature input unit and In this case, the received temperature is provided to the daily test unit and the patient measurement unit.

The diagnosis unit 200 according to the present invention includes a memory unit 210, a daily test unit 220, a patient measuring unit 230, and a bone density calculator 240.

2 is a block diagram showing an apparatus for measuring bone density using temperature compensation according to a preferred embodiment of the present invention.

1 and 2, the memory 210 stores a first table and a second table in advance.

The 1st table 212 is the table which measured the bone density of the phantom according to temperature.

That is, the first table 212 shows normal bone density values of the phantom to be measured according to the temperature.

The second table 214 is a table showing an error value generated according to temperature in a mean value of bone density of normal people.

That is, the second table 214 is based on the average value calculated by measuring the bone density of normal people at any one temperature, and shows the error value that the average value and the error occurs according to the temperature when the bone density is measured. .

Here, when the bone density of normal people is measured, the temperature at which the optimal bone density is measured is 21.5 ° C., and when the bone density is measured at a temperature other than 21.5 ° C., an error occurs.

For example, the second table 214 is calculated as follows.

First, when the bone density of normal people at 21.5 ℃ is measured, the average value of the measured values is the first reference. And when the bone density of the normal person was measured at the temperature which changed, for example, at 25 degreeC, without measuring bone density at 21.5 degreeC, the average value of the measured values is made into a 2nd reference | standard. Finally, an error value appearing when comparing the first criterion and the second criterion is calculated.

That is, the second table 214 is a table prepared according to the temperature of error values generated as the temperature changes based on the bone density value measured at 21.5 ° C.

The daily test unit 220 provides a difference value by performing a daily check of the bone density measuring apparatus 100.

Here, the bone density measurement apparatus 100 is a daily test is performed by the daily test unit 220, it is possible to check the validity of the bone density measurement value of the measurement device from the daily test and calculate the difference value accordingly.

That is, the daily test unit 220 measures the bone density of the phantom when the first room temperature measured by the thermometer 115 is input while the phantom coated with the ultrasonic gel is positioned between the ultrasonic measuring units 114. The difference value obtained by subtracting the bone density corresponding value corresponding to the input first temperature from the first table 212 is calculated from the measured bone density measurement value of the phantom.

Phantom refers to a model that is used as a substitute for biosystem research, such as investigation and analysis of the distribution of electromagnetic waves within a human body and the specific absorption rate (SAR) of human tissue. The quantitative evaluation of the electromagnetic waves received by the human body is carried out by specific absorptivity, and since it is difficult to actually measure them, it creates a so-called phantom that is the same as the human body. By estimation. The phantom needs to have an appearance similar in size to that of the human tissue structure and to have relative permittivity epsilon, conductivity σ and density ρ of the human tissue at each measurement frequency.

In addition, it is preferable to use the phantom having a specification recommended by the bone density measuring apparatus 100.

Here, the phantom is located between the ultrasonic measuring unit 114 which is installed to face each other, the bone density is measured, it is preferable that the ultrasonic gel is applied to the contact area in contact with the ultrasonic measuring unit 114.

The patient measuring unit 230 measures the bone density of the patient and provides a result value.

That is, the patient measuring unit 230 measures the patient's bone density when the second room temperature measured by the thermometer 115 is input while the patient's bone density measurement site is positioned between the ultrasound measuring units 114. The calculated result is obtained by subtracting an error value corresponding to the input second room temperature from the second table 214 from the measured bone density value of the patient.

In addition, the room temperature input by the daily test unit 220 and the patient measuring unit 230 may be selected by inputting the largest room temperature among the temperatures measured by the thermometer 115.

The bone density calculation unit 240 calculates a final bone density value obtained by subtracting the difference value provided by the daily test unit 220 from the result value provided by the patient measuring unit 230.

Next, a method for measuring bone density through temperature compensation according to the present invention will be described with reference to FIGS. 3 and 4.

Figure 3 is a flow chart showing a method for measuring the bone density of the phantom in the bone density measuring apparatus using the temperature compensation according to an embodiment of the present invention, Figure 4 is a bone density measuring apparatus using the temperature compensation according to a preferred embodiment of the present invention It is a flowchart which shows the method of measuring bone density of a patient.

First, referring to FIG. 3, before measuring bone density of a patient using the bone density measuring apparatus 100, a phantom coated with ultrasound gel is placed on the ultrasonic measuring unit 114 and a daily test is performed.

The first indoor temperature measured by the thermometer 115 is input to the diagnosis unit 200. (S310)

The daily test unit 220 measures the bone density of the phantom (S320).

Then, the difference value is calculated by subtracting the corresponding bone density value corresponding to the first indoor temperature inputted from the first table 212 from the measured bone density value of the phantom (S330).

For example, it is assumed that the first indoor temperature input is 25 ° C., the bone density measurement value of the phantom to be measured is 1640 m / s, and the first table 212 is shown in Table 1 below.

Temperature Bone Mineral Density Reference Value of Phantom with Temperature 20 ℃ 1640 m / s 21 ℃ 1639 m / s 22 ℃ 1638 m / s 23 ℃ 1637 m / s 24 ℃ 1636 m / s 25 ℃ 1635 m / s 26 ℃ 1634 m / s 27 ℃ 1633 m / s 28 ℃ 1632 m / s 29 ℃ 1631 m / s 30 ℃ 1630 m / s

That is, the daily test unit 220 subtracts 1635 m / s of the corresponding bone density value corresponding to 25 ° C. in [Table 1] from the measured bone density measurement value of 1640 m / s, and a difference value of 5 m / s is calculated. .

Therefore, when the bone density measuring apparatus 100 measures the bone density, it can be seen that the difference of about 5 m / s.

Referring to FIG. 4, after the daily test is completed by the daily test unit 220 to measure the bone density of the patient using the bone density measuring apparatus 100, the bone density measurement site of the patient is positioned in the ultrasound measuring unit 114. Afterwards, the bone density of the patient is measured.

The second indoor temperature measured by the thermometer 115 is input to the diagnosis unit 200. (S410)

The patient measuring unit 230 measures the bone density of the phantom (S420).

Then, the resultant value is calculated by subtracting an error value corresponding to the input second room temperature in the second table 214 from the measured bone density value of the patient.

Then, the bone density value of the patient is calculated by subtracting the difference value from the result value (S440).

For example, it is assumed that the input temperature is 25 ° C, the bone density measurement value of the patient to be measured is 1520 m / s, and the second table 214 is as shown in Table 2 below.

In addition, the second table 214 is based on the average value of the bone density measurement values of the normal people at 20 ℃, and shows the error value and the average value and the error occurs according to the changing temperature.

For reference, when the error value is obtained from the second table 214, it is preferable to measure the bone density at 21.5 ℃, Table 1 and Table 2 below are intended to help explain according to an embodiment of the present invention is limited thereto. I never do that.

Temperature Error 20 ℃ 0 m / s 21 ℃ 2 m / s 22 ℃ 4 m / s 23 ℃ 6 m / s 24 ℃ 8 m / s 25 ℃ 10 m / s 26 ℃ 12 m / s 27 ℃ 14 m / s 28 ℃ 16 m / s 29 ℃ 18 m / s 30 ℃ 20 m / s

That is, the patient measuring unit 230 calculates a result value of 1510 m / s by subtracting 10 m / s, which is an error value corresponding to 25 ° C. in [Table 1], from the measured bone density value of 1520 m / s.

In addition, the bone density measuring apparatus 100 generates an error value of about 10 m / s when measuring the bone density of the patient, and more accurately measures the bone density of the patient through the error value.

At this time, the bone density calculator 240 calculates the final patient bone density of 1505 m / s by subtracting the difference value 5 m / s from the result value 1510 m / s.

Therefore, by subtracting the difference value of the bone density measurement device 100 that changes according to the day through the daily test, and the error value generated in the bone density of the patient measured by the bone density measurement device 100 from the measured bone density measurement value of the patient The final bone density of the final patient is calculated.

Therefore, the bone density measuring apparatus using the temperature compensation according to the present invention precisely measures the bone density value of the patient according to the change in the temperature of the bone density measuring apparatus 100, as well as reducing the error generated while measuring as much as possible, more reliable measurement You can expect results.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

110: main body 111: scaffolding
112: variable position measuring member 113: calf support
114: ultrasonic measurement unit 115: thermometer
200: diagnostic unit 210: memory unit
212: First Table 214: Second Table
220: daily test unit 230: patient measurement unit
240: bone density calculator

Claims (3)

A thermometer installed at one side of the bone density measuring device to measure room temperature;
A temperature input unit which provides a room temperature measured by the thermometer to a daily test unit and a patient measurement unit; And
A memory unit storing a first table measuring bone density of the phantom according to temperature and a second table representing an error value generated according to temperature in a mean value of bone density of normal persons; When the first indoor temperature is provided by the temperature input unit, the bone density of the phantom coated with ultrasonic gel is measured, and the bone density measured value of the phantom is subtracted from the measured value corresponding to the input first indoor temperature of the first table. A daily test unit providing a difference value; When the second room temperature is provided by the temperature input unit, the bone density of the patient is measured, and the resultant value obtained by subtracting an error value corresponding to the input second room temperature of the second table from the measured patient bone density measurement value. Providing patient measuring unit; And a bone density calculation unit for calculating a final bone density value obtained by subtracting the difference value provided by the daily test unit from the result value provided by the patient measuring unit. Diagnostic unit comprising a; Including,
The first table,
Characterized in that the normal bone density values of the phantom to be measured according to the temperature,
The second table,
It is based on the average value calculated by measuring the bone density of normal people at any one temperature, characterized in that the error value generated by the average value and the error according to the temperature when measuring the bone density,
The temperature input unit,
When the thermometer is a digital thermometer, when the input button installed on one side of the bone density measuring device is pressed to provide the temperature measured by the digital thermometer to the daily test unit and the patient measuring unit,
When the thermometer is an analog thermometer, the bone density measuring apparatus using the temperature compensation, characterized in that for providing a temperature input from the user to the daily test unit and the patient measuring unit. delete delete
KR1020120000820A 2012-01-04 2012-01-04 Bone density measurement device using temperature compensation KR101171852B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002136518A (en) * 2000-11-02 2002-05-14 Aloka Co Ltd Ultrasonic biotissue evaluation device
JP2002143165A (en) 2000-11-13 2002-05-21 Aloka Co Ltd Calibration tool for ultrasonic living body tissue evaluating instrument and ultrasonic living body tissue evaluating system
JP2008278991A (en) 2007-05-09 2008-11-20 Univ Of Yamanashi Heel bone sound velocity measuring device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002136518A (en) * 2000-11-02 2002-05-14 Aloka Co Ltd Ultrasonic biotissue evaluation device
JP2002143165A (en) 2000-11-13 2002-05-21 Aloka Co Ltd Calibration tool for ultrasonic living body tissue evaluating instrument and ultrasonic living body tissue evaluating system
JP2008278991A (en) 2007-05-09 2008-11-20 Univ Of Yamanashi Heel bone sound velocity measuring device

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