KR101781896B1 - Handheld bone mineral density measurement device using phalanges - Google Patents
Handheld bone mineral density measurement device using phalanges Download PDFInfo
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- KR101781896B1 KR101781896B1 KR1020160009302A KR20160009302A KR101781896B1 KR 101781896 B1 KR101781896 B1 KR 101781896B1 KR 1020160009302 A KR1020160009302 A KR 1020160009302A KR 20160009302 A KR20160009302 A KR 20160009302A KR 101781896 B1 KR101781896 B1 KR 101781896B1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
- A61B5/4504—Bones
- A61B5/4509—Bone density determination
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0048—Detecting, measuring or recording by applying mechanical forces or stimuli
- A61B5/0051—Detecting, measuring or recording by applying mechanical forces or stimuli by applying vibrations
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4869—Determining body composition
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
- A61B5/6898—Portable consumer electronic devices, e.g. music players, telephones, tablet computers
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/7253—Details of waveform analysis characterised by using transforms
- A61B5/7257—Details of waveform analysis characterised by using transforms using Fourier transforms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7271—Specific aspects of physiological measurement analysis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
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Abstract
A handheld bone densitometer using a phalanx is disclosed. The handheld bone densitometry apparatus according to an embodiment of the present invention includes a body portion having an insertion portion into which a finger or a toe of a subject to be measured is inserted; A vibration applying member which is embedded in the body and is located at one side of the insertion portion and applies vibration to the object to be measured; A vibration measuring member disposed on the other side of the insertion portion to measure a change in vibration of the measurement subject; And a signal processing unit for receiving the vibration change measured by the vibration measuring member, measuring the natural frequency of the measured subject, and calculating the bone density of the measured subject based on the natural frequency.
Description
BACKGROUND OF THE
Aging-related diseases (such as cerebrovascular disease, cardiovascular disease, cancer, and skeletal disease) are increasing in the age of aging. The number of patients diagnosed with osteoporosis, which is a disease with a decrease in bone density, also increased significantly. Osteoporosis is classified as basic diseases such as fractures and back pain of elderly people. Early diagnosis and prevention of osteoporosis is very important.
There are five types of measurement devices for diagnosing existing osteoporosis. (Measurement method using X-ray), DXA (measurement method using dual X-ray), QUS (measurement method using ultrasonic waves), QMR (measurement method using magnetic force), QCT It is.
However, these existing measuring devices are not suitable for high cost (QMR, QCT), excessive installation space (DXA), high measurement accuracy (RA, QUS) And the like. Therefore, research and development are being carried out to improve these disadvantages.
The present invention relates to a hand held bone densitometer which is relatively inexpensive in cost of bone density examination, is formed in a handheld shape, does not require an excessive installation space, is not harmful to health because the subject is not exposed to radiation, Measuring device.
In addition, a body composition analyzing apparatus provided with the bone density measuring apparatus is further provided.
According to an aspect of the present invention, there is provided a blood pressure monitor comprising: a body portion having an insertion portion into which a finger or a toe of a subject to be measured is inserted; A vibration applying member which is embedded in the body and is located at one side of the insertion portion and applies vibration to the measured object; A vibration measuring member disposed on the other side of the insertion portion to measure a change in vibration of the measured object; And a signal processing unit for receiving the change in vibration measured by the vibration measuring member and measuring a natural frequency of the measured subject and calculating a bone density of the measured subject based on the natural frequency, Can be provided.
At this time, a vibration output end for outputting vibration is formed at the end of the vibration applying member, and a center hole may be formed at one side of the insertion unit such that the vibration output end is exposed to the outside.
Further, it may further include a vibration-proof member disposed on both sides of the insertion portion.
Further, the vibration measuring member may be selected from a piezoelectric sensor, a pressure sensor or an accelerometer.
The apparatus may further include at least one guide portion extending from the body portion to surround the insertion portion, the at least one guide portion gripping the measurement object.
According to another aspect of the present invention, there is provided a body measuring apparatus comprising: a body portion including a bottom portion on which a finger or a toe of a subject to be measured is placed, and at least one claw portion coupled to an upper portion of the bottom portion to receive the subject; A vibration applying member located on an outer surface or inside of the bottom portion and applying vibration to the measured object; A vibration measuring member provided on the ring portion to closely contact the measured object and measuring a change in vibration of the measured object; And a signal processor for receiving a change in vibration measured in the electromyographic system and measuring a natural frequency of the measured subject and calculating a bone density of the measured subject based on the natural frequency, .
In this case, the signal processing unit may include: a natural frequency measurement module for performing a fast Fourier transform process on the vibration change received from the accelerometer and measuring a natural frequency through frequency analysis of a waveform; And a bone mineral density calculation module for calculating the bone mineral density based on the natural frequency, the length and the thickness of the subject to be measured.
The signal processing unit may further include a control signal generation module for generating a control signal for driving the vibrator or controlling the magnitude of vibration and transmitting the control signal to the vibrator.
Further, the BMD calculating module can calculate the BMD according to the following equations (1) and (2).
[Formula 1]
E is 25 GPa,? Is 1.875104, d 2 is the height of the middle node constituting the finger or toe, and L is the length of the entire finger or toe.
[Formula 2]
In Equation (2), l 1 , l 2 , and l 3 are the height of the first bar, the middle bar, the end bar, and d 1 , d 2 , and d 3 , respectively, of the finger or toe.
In this instance, the bone density calculation module is the [formula 1] and [formula 2] of the l 1, l 2, l 3 is L / 3, d 1: d 2:
According to another aspect of the present invention, there is provided a power generating apparatus comprising: a main body portion having a power generating pole formed on an upper surface thereof; A bar-shaped hand electrode part connected to the body part by a cable and having a hand electrode formed on a surface thereof; And a hand-held bone mineral density measuring device provided to the body part or the hand electrode part.
The handheld bone densitometry apparatus according to embodiments of the present invention can calculate the bone density with only the natural frequency value measured through the vibration and the length and height (thickness, diameter) of the measured subject, This is easy. In addition, since a bone density generating device can be constituted by a handheld type, an excessive installation space is not required, and it can be used in connection with a conventional body composition analyzer and the like, and the bone density can be measured harmlessly to the human body.
1 is a perspective view schematically illustrating a handheld bone densitometer according to an embodiment of the present invention.
FIG. 2 is a diagram further illustrating a form in which a finger of a subject to be measured is inserted into the handheld bone densitometer of FIG. 1 and a guide unit. FIG.
3 is a block diagram showing the configuration of the signal processing unit.
4 is a diagram showing an example of an FFT graph.
5 is a diagram for explaining input values of [Equation 1] and [Equation 2].
6 is a perspective view schematically showing a handheld bone densitometer according to another embodiment of the present invention.
7 is a schematic view of a body composition analyzing apparatus according to an embodiment of the present invention.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the following description is illustrative of the present invention, and the technical spirit of the present invention is not limited to the following description. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
FIG. 1 is a perspective view schematically showing a handheld bone densitometer 100 (hereinafter, referred to as a BMD) according to an embodiment of the present invention. FIG. 2 is a perspective view of the BMD measuring
1 and 2, the bone mineral
The bone
The
The bone density measurement method based on the method of measuring the natural frequency using the vibration has various advantages. For example, the method of using vibration compared with the method using radiation is harmless to human body. In addition, in the case of using the vibration, it is possible to achieve miniaturization of the apparatus, no space for installing a large measuring instrument is required, and the measurement time is relatively short, so that the bone density test cost can be kept relatively cheap. In addition, since a low frequency (10 kHz or less) is used as compared with the case of using an ultrasonic wave of a high frequency (100 kHz or more), there is little possibility of thermal damage to an object to be measured.
On the other hand, an object to be measured of the bone mineral
Hereinafter, a specific configuration of the
The bone
The
The
The
The
The
A
The
The
When the finger of the subject is inserted into the
The bone
The bone
When the finger of the subject is inserted into the
The
The
3 is a block diagram showing the configuration of the
The control
The natural
The bone
[Formula 1]
[Formula 1] is a method of modeling a finger or a toe of a subject to be measured as a three-stepped beam, and using the beam theory (Euler-Bernoulli, uniform beam and free vibration conditions) As shown in Fig. In this case, Moment of Inertia uses the equivalent inertia. 5 is a diagram for explaining the input values of [Equation 1] and [Equation 2].
In
On the other hand, in
[Formula 2]
The [formula 2] from l 1, l 2, l 3 are each finger (or toe) the structure first words in length, meaning the middle word length, kkeutmadi length and, d 1, d 2, d 3 are each finger (or Toe), the height of the middle node, and the height of the end node (where height is similar to "thickness" or "diameter"). And L is the length of the entire finger (or toe) (see FIG. 5).
[Expression 1], in [Expression 2] l 1, l 2, l 3 are all L / 3, d 1: d 2:
At least one of the control
The
The bone
In addition, the
Hereinafter, a handheld bone densitometer 200 (hereinafter referred to as a BMD measuring apparatus) according to another embodiment of the present invention will be described. However, for the same or similar parts as those of the above-described embodiment, redundant description will be omitted, and differences will be mainly described.
6 is a perspective view schematically showing an apparatus 200 for measuring bone density according to another embodiment of the present invention. Referring to FIG. 6, the bone mineral density measuring apparatus 200 may include a
The
The
The
The
The
The
As described above, the handheld bone densitometry apparatus according to the embodiments of the present invention can calculate the bone density with only the natural frequency value measured through the vibration and the length and height (thickness, diameter) of the measured subject, Measurement time is fast and measurement is easy. In addition, since a bone density generating device can be constituted by a handheld type, an excessive installation space is not required, and it can be used in connection with a conventional body composition analyzer and the like, and the bone density can be measured harmlessly to the human body.
The present invention can additionally provide a body composition analyzing apparatus including the aforementioned handheld bone densitometer. 7 is a schematic view of a body composition analyzing apparatus according to an embodiment of the present invention. 7, the body composition analyzing apparatus comprises a
The
Embodiments of the present invention have been described above. However, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. It will be understood that various modifications may be made in the invention, and that such modifications are also included within the scope of the present invention.
100, 200: Handheld bone densitometer
110, 210:
120, 220: vibration applying member
130, 230: vibration measurement member
140, and 240:
Claims (11)
A vibration applying member which is embedded in the body and is located at one side of the insertion portion and applies vibration to the measured object;
A vibration measuring member disposed on the other side of the insertion portion to measure a change in vibration of the measured object;
A natural frequency measurement module for performing a fast Fourier transform process on the vibration change received from the vibration measuring member and measuring a natural frequency through a frequency analysis of a waveform; And
And a bone density calculation module for calculating a bone density based on the natural frequency, the length and the thickness of the subject to be measured,
The BMD calculation module is expressed by the following equation (1). The handheld bone mineral density measuring apparatus according to claim 2,
[Formula 1]
In the above formula 1, ρ is the bone mineral density of the subject to be measured, E is the elastic modulus (N / m 2 ) of 25 GPa, f is the natural frequency, α is 1.875104, d 2 is the middle node constituting the finger or toe Height, and L is the length of the entire finger or toe.
[Formula 2]
The [formula 2] from l 1, l 2, l 3 are first words that make up the first words, an intermediate node, the length of kkeutmadi, d 1, d 2, d 3 are each finger or toe constituting the finger or toe, respectively , Middle node, height of the end node.
A vibration output end for outputting vibration is formed at an end of the vibration applying member,
And a center hole is formed at one side of the insertion portion such that the vibration output end is exposed to the outside.
And an anti-vibration member disposed on both sides of the insertion portion.
Wherein the vibration measuring member is selected from a piezoelectric sensor, a pressure sensor or an accelerometer.
Further comprising at least one guide portion extending from the body portion to be positioned at the periphery of the insertion portion, the at least one guide portion holding the object to be measured.
A vibration applying member located on an outer surface or inside of the bottom portion and applying vibration to the measured object;
A vibration measuring member provided on the ring portion to closely contact the measured object and measuring a change in vibration of the measured object;
A natural frequency measurement module for performing a fast Fourier transform process on the vibration change received from the vibration measuring member and measuring a natural frequency through a frequency analysis of a waveform; And
And a bone density calculation module for calculating a bone density based on the natural frequency, the length and the thickness of the subject to be measured,
The bone-density calculating module calculates the bone density according to the following equations (1) and (2).
[Formula 1]
In the above formula 1, ρ is the bone mineral density of the subject to be measured, E is the elastic modulus (N / m 2 ) of 25 GPa, f is the natural frequency, α is 1.875104, d 2 is the middle node constituting the finger or toe Height, and L is the length of the entire finger or toe.
[Formula 2]
The [formula 2] from l 1, l 2, l 3 are first words that make up the first words, an intermediate node, the length of kkeutmadi, d 1, d 2, d 3 are each finger or toe constituting the finger or toe, respectively , Middle node, height of the end node.
And a control signal generating module for generating a control signal for driving the vibration applying member or controlling the magnitude of the vibration and transmitting the control signal to the vibration applying member.
The bone density calculation module is the [formula 1] and [Expression 2] to l 1, l 2, l 3 is L / 3, d 1: d 2: d 3 is 0.89d 2: 1.12d to 2: d 2 Thereby calculating a bone density.
A bar-shaped hand electrode part connected to the body part by a cable and having a hand electrode formed on a surface thereof; And
The body composition analyzing apparatus according to claim 1 or 6, wherein the body part or the hand electrode part is provided with a hand-held bone densitometer.
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