WO2015060488A1 - Système pour mesurer la densité osseuse par reconnaissance de position automatique et procédé de mesure à cet effet - Google Patents

Système pour mesurer la densité osseuse par reconnaissance de position automatique et procédé de mesure à cet effet Download PDF

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Publication number
WO2015060488A1
WO2015060488A1 PCT/KR2013/009666 KR2013009666W WO2015060488A1 WO 2015060488 A1 WO2015060488 A1 WO 2015060488A1 KR 2013009666 W KR2013009666 W KR 2013009666W WO 2015060488 A1 WO2015060488 A1 WO 2015060488A1
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Prior art keywords
subject
bone density
ray
unit
marker
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PCT/KR2013/009666
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English (en)
Korean (ko)
Inventor
김국세
박정회
이병석
김재학
최무진
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(주)나눔테크
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Priority to CN201380077868.5A priority Critical patent/CN105358061A/zh
Publication of WO2015060488A1 publication Critical patent/WO2015060488A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/505—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A61B6/0492—Positioning of patients; Tiltable beds or the like using markers or indicia for aiding patient positioning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/08—Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/4064—Arrangements for generating radiation specially adapted for radiation diagnosis specially adapted for producing a particular type of beam
    • A61B6/4085—Cone-beams

Definitions

  • the present invention relates to a system for measuring bone density through automatic position recognition and a method of measuring the same, and more particularly, to a cone density (cone-beam) type bone density measuring system capable of irradiating X-rays in units of planes.
  • a cone density (cone-beam) type bone density measuring system capable of irradiating X-rays in units of planes.
  • osteoporosis As a "systemic skeletal disease that is prone to fractures and increased bone fragility due to a decrease in bone mass and changes in the microstructure of bone tissue.”
  • WHO World Health Organization
  • the definition of osteoporosis is based on bone density measured by the T-score standard deviation measured by dual energy X-ray absorptiometry (DXA) of the spine, buttocks or forearms.
  • the basic principle of the dual energy radiation absorption method is to measure the degree of attenuation as it penetrates the soft tissues and bones of the body using two different energy X-ray photons, and the dual energy radiation absorption method is an X-ray beam. It is based on the fact that as it passes through this material, the x-ray intensity is attenuated by the amount determined by the material's basic properties, i.e. thickness, density and atomic composition. There are fan-beam and cone-beam methods.
  • the fan-beam method is used in most cases, and in this case, the scan is performed by the line during the hole-body scan of the patient.
  • Korean Patent No. 10-0886483 (“Ultrasonic Foot Bone Density Measurement Device capable of Correction of Measurement Position”, hereinafter, Reference Document 1)
  • the feet of the subject are measured by the plurality of gap adjusting members installed at both ends of the footrest part.
  • the heel and the achilles tendon can be fixed by the achilles gun cover part, and the calf can be fixed by the calf support. Since it is firmly fixed, it discloses an ultrasonic foot bone density measuring apparatus capable of describing more reliable measurement results.
  • Prior Art 1 is not a whole-body scan, i.e. a systemic bone density measurement system, but only a foot which is a body part of a patient (measured body), and performs bone density measurement after fixing the foot. Problems such as unnecessary physical contact, loss of original data due to image overlap, and unnecessary radiation exposure, which are problems to be overcome in the measurement system, are not mentioned at all.
  • an object of the present invention is a bone density measurement system in the form of a cone-beam (cone-beam) capable of irradiating X-rays in units of plane, the pre-stored patient Recognition of information about the location of the patient's body through the camera to determine the location of the bone density to be measured automatically, and by measuring the bone density, effectively reducing the time taken to minimize the movement of the patient by each part of the body It is to provide a bone density measurement system and automatic measuring method through automatic location recognition that can automatically adjust the X-ray radiation dose to minimize the X-ray exposure of the patient.
  • the X-ray source unit for generating a cone-beam (cone-beam) X-rays (X-ray), and the position recognition camera 10 Recognizing a plurality of markers 20 that can be fixed to the subject by using, the head unit 100 and the x-ray source unit 110 including a position recognition unit 120 for determining the body position information of the subject It is designed to face), and comprises an X-ray detector 210 for detecting the X-rays irradiated from the X-ray source unit 110 and passed through a specific part of the subject, to generate a bone image of a two-dimensional plane form Being connected to the bed unit 200 and the head unit 100 and the bed unit 200 in a wired or wireless manner, according to the body position information determined by the position recognition unit 120, the measurer is trying to photograph Body parts of a measurer And controlling the X-ray source unit 110 to irradiate the X-rays, and including a central control unit
  • the bone density measurement system using the automatic position recognition, using the position recognition camera 10, according to the size of the plurality of the marker 20 is fixed to the subject, the head portion 100,
  • the distance between the markers 20 may be determined to control the amount of X-ray radiation emitted from the X-ray source unit 110.
  • the bone density measurement system using the automatic position recognition further comprises an X-ray control unit 130 including a distance measuring sensor 30 in the head unit 100, the X-ray control unit 130 is The distance between the plurality of markers 20 fixed to the subject and the head unit 100 is determined by using the distance measuring sensor 30 to control the amount of X-ray irradiation irradiated from the X-ray source unit 110. It is characterized by.
  • the head unit 100 is rotated by 90 degrees under the control of the central control unit 300,
  • the bed 200 is moved in the up and down directions under the control of the central control unit 300.
  • the marker 20 may be fixed to at least one of the head, neck, chest, abdomen, or thigh of the subject, and when the bone density of the subject's head is measured according to the determination of the central controller 300.
  • the X-ray source 110 irradiates X-rays to the marker 20 of the head of the subject for 250 ms at 4 mA and measures the bone density of the chest of the subject, 5 mA in the X-ray source unit 110 is measured.
  • the X-ray is irradiated to the marker 20 of the chest part of the subject for 250 ms, and when measuring the bone density of the abdomen of the subject, the X-ray source unit 110 of the abdomen part of the subject for 500 ms for 6 ms.
  • the X-ray is irradiated to the marker 20 and the bone density of the femoral part of the subject is measured
  • the X-ray is irradiated to the marker 20 of the femoral part of the subject for 250 ms at 4 mA from the X-ray source unit 110. And that is characterized.
  • the X-ray detector 210 is characterized in that it comprises a scintillator layer and a camera for photographing the scintillator layer.
  • the X-ray irradiation step (S300) is the central controller is characterized in that the
  • the bone density measurement method using the automatic position recognition before performing the X-ray irradiation step (S300), the distance determination step (S210), the distance determining the distance between the marker fixed to the subject and the head portion According to the distance determined in the determination step (S210), using the obesity degree calculation step (S220) of calculating the obesity degree of the subject and the obesity degree of the subject measured in the obesity degree calculation step (S220) in the central control unit, the X-ray source A dose control step (S230) of controlling the dose of X-rays radiated from the unit may be further performed.
  • Bone density measurement system and method through the automatic position recognition of the present invention by the above configuration and the method is to measure the bone density in the form of cone-beam (cone-beam) that can irradiate X-rays per plane, pre-stored patient information and location recognition
  • cone-beam cone-beam
  • the body region information storage marker of the patient through the camera automatically determines the photographing site to measure the bone density has the advantage that can easily measure the bone density.
  • FIG. 1 is a block diagram schematically illustrating a system for measuring bone density through automatic location recognition according to an embodiment of the present invention.
  • FIG. 2 is an exemplary view showing a head and a bed of the bone density measuring system through automatic position recognition according to an embodiment of the present invention.
  • Figure 3 is an exemplary view showing a marker of the bone density measurement system through automatic location recognition according to an embodiment of the present invention.
  • FIG. 4 is an exemplary view illustrating an X-ray control unit of a bone density measurement system using automatic location recognition according to an embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a method for measuring bone density through automatic location recognition according to an embodiment of the present invention.
  • FIG. 6 is a flowchart illustrating a method for measuring bone density through automatic location recognition according to another embodiment of the present invention.
  • a system is a set of components including devices, instruments, means, and the like that are organized and regularly interact to perform the necessary functions.
  • FIG. 1 is a block diagram schematically illustrating a system for measuring bone density through automatic location recognition according to an embodiment of the present invention. Referring to Figure 1 will be described in detail the bone density measurement system through automatic location recognition according to an embodiment of the present invention.
  • the bone density measurement system using automatic location recognition includes a position where the marker 20 is recognized using the X-ray source unit 110 and the location recognition camera 10.
  • the head unit 100 including the recognition unit 20, the X-ray control unit 130, the bed unit 200 including the X-ray detector unit 210 and the head unit 100 and the bed unit It may be configured to include a central control unit 300 that is connected to the 200 and wireless or wired.
  • the recording time that is, the time required for the subject to minimize movement It takes a long time from a minute and a half to a maximum of 30 minutes, and when applied to a systemic bone density measurement system other than a specific part such as ankle or wrist, there is a lot of unnecessary contact for the measurer to determine the location information of the body part of the subject.
  • the X-ray source unit 110 of the head portion 100 of the bone density measuring system through automatic position recognition is X-ray (cone-beam) type X-rays (cone-beam) May occur.
  • the one-time shooting time is about 1 second and thus, there is an advantage of minimizing unnecessary X-ray exposure.
  • the position recognizing unit 120 of the head unit 100 recognizes the plurality of markers 20 fixed in advance to the subject using the position recognition camera 10 to determine body position information of the subject. can do.
  • the plurality of markers 20 may be recognized through the position recognizing unit 120 according to an embodiment of the present invention to determine accurate body position information of the subject.
  • the body position information means information on the body part to be measured by the subject
  • the bone density measuring system and its measuring method through automatic position recognition according to an embodiment of the present invention are fixed to the subject
  • Two markers 20 are recognized to determine the information about the body part of the subject to be measured, and then the bed 200 is moved up, down, left, and right on a plane to be measured by the X-ray source unit 110.
  • X-rays can be easily irradiated to specific areas to be self-measured.
  • the marker 20 is fixed to the position recognition camera 10 so as to be easily recognized by the position recognition camera 10 in a necessary area such as the subject's head, neck, chest, abdomen and thigh. Marking may be performed, and the marker 20 may be fixed to the body part of the subject.
  • the marker 20 may be fixed to the body part of the subject by one surface is made of an adhesive member, or one surface is made of a friction member that generates friction force.
  • the means for fixing the marker 20 to the body part of the subject is only one embodiment of the present invention.
  • the position recognition unit 120 when receiving the basic information of the subject, that is, the basic body information, such as a key, the marker that is fixed from the head of the subject to the thigh ( 20) can be recognized more quickly to determine the body position information of the subject.
  • the basic body information such as a key
  • the marker 20 is only recognized through the position recognition camera 10 and does not affect X-rays generated by the X-ray source unit 110.
  • the X-ray controller 130 of the head unit 100 may include a distance measuring sensor 30.
  • the X-ray control unit 130 uses the distance measuring sensor 30 to between the plurality of markers 20 fixed in advance to the subject and the distance measuring sensor 30. By determining the distance, the amount of X-ray radiation radiated from the X-ray source unit 110 may be controlled.
  • the subject measures the distance when the bed portion 200 is laid down.
  • the distance between the head part 100 and the marker 20, that is, the subject to be measured may be determined using the recognized size of the marker 20.
  • the body thickness of the subject that is, obesity can be measured, and the amount of X-ray irradiation irradiated from the X-ray source unit 110 can be controlled using this.
  • the bone density measurement system through automatic position recognition according to an embodiment of the present invention, without the X-ray controller 130, that is, the distance measuring sensor 30, the marker 20 in the position recognition camera 10 ),
  • the distance between the marker 20 and the head 10 may also be determined based on the size of the marker 20. That is, when the size of the marker 20 is large, it may be determined that the distance between the subject and the head 100 is close.
  • the obesity degree of the subject can be calculated based on the determined distance, and the obesity degree calculation information can be transmitted to the central control unit 300, and the X-ray control unit 130 irradiates the X-ray source unit 110. It is possible to control the amount of X-ray irradiation.
  • the X-ray detector unit 210 of the bed unit 200 is designed to face the X-ray source unit 110, and detects X-rays radiated from the X-ray irradiator 110 to pass through a specific part of the subject. It is possible to create a bone image in a planar form.
  • the X-ray detector 210 may detect X-rays passing through a specific body part of the subject and generate the detection result as an analog signal, and convert the analog signal into a digital signal to generate a bone image. Done.
  • the X-ray detector 210 transmits the generated bone image to the central control unit 300, and the central control unit 300 may determine the bone density of the subject through the bone image.
  • the X-ray detector 210 may further include a scintillator layer and a camera for photographing the scintillator layer.
  • the scintillator layer emits visible light when X-rays are received, and a bone image, which is an X-ray imaging image, may be obtained by photographing an image of the scintillator layer with a camera that photographs the scintillator layer, that is, a visible light camera. .
  • the bed unit 200 including the X-ray detector unit 210 is operated by a separate lift means (not shown) so that the subject can easily lay on the bed unit 200.
  • the height of the bed 200 may be controlled according to the control of the manager of the central control unit 300, that is, the measurer.
  • the central control unit 300 rotates the head unit 100 by 90 degrees according to the position of the subject under the control of the manager, that is, the measurer of the central control unit 300.
  • the head When the subject is lying on the bed unit 200, the head may be prevented from hitting, and according to the body position information of the subject determined by the position recognizing unit 120, up, down, left, and right on the plane of the bed unit 200.
  • the X-ray source unit 110 By moving to the X-ray source unit 110 can be irradiated X-ray at the correct position to minimize the unnecessary X-ray exposure of the subject.
  • the central control unit 300 is connected to the head unit 100 and the bed unit 200 by wire or wirelessly,
  • the X-ray is irradiated to the body part of the subject to be photographed by the manager (measurer) of the central control unit 300 according to the body position information of the subject determined by the position recognition unit 120 of the head unit 100.
  • the X-ray source unit 110 may be controlled to be controlled.
  • the central control unit 300 moves the position of the bed unit 200 on the plane up, down, left, and right according to the body position information of the subject measured by the position recognizing unit 120 of the head unit 100.
  • the X-ray source unit 110 may be positioned at a specific body part of a subject to be photographed, so that X-rays may be irradiated.
  • the central control unit 300 may control the irradiation amount and time of X-rays differently according to the body part to be photographed by the subject.
  • the position of the marker 20 fixed to at least one of the head, neck, chest, abdomen or thigh of the subject to be recognized
  • the X-ray source unit 110 radiates X-rays to the marker 20 of the head of the subject for 250 ms at 4 mA. Can be controlled,
  • the X-ray source 110 may be controlled to irradiate X-rays to the marker 20 of the chest portion of the subject for 250 ms at 5 mA,
  • the X-ray source 110 may be controlled to irradiate the X-ray to the marker 20 of the abdomen of the subject for 500 ms at 6mA,
  • the X-ray source 110 may be controlled to irradiate X-rays to the marker 20 of the femoral portion of the subject for 250 ms at 4 mA.
  • the central control unit 300 receives the bone image generated by the X-ray detector unit 210 to determine the bone density.
  • the central control unit 300 may further include a database unit (not shown).
  • the database unit may database the X-ray irradiation amount irradiated by the X-ray source unit 110 and the bone image generated by the X-ray detector unit 210 with respect to the body position information of the subject determined by the position recognizing unit 120. Can be stored and managed
  • the database unit may transmit the X-ray dosage data and the bone image data stored and managed according to an external request.
  • the data may be transmitted only to the outside that has been authenticated after performing a separate authentication procedure.
  • the bone density measurement system through automatic location recognition may be configured to include a separate voice means (not shown),
  • FIG. 5 is a block diagram schematically illustrating a method for measuring bone density through automatic location recognition according to an embodiment of the present invention. Referring to Figure 5 will be described in detail the bone density measurement method through automatic location recognition according to an embodiment of the present invention.
  • the method for measuring bone density through automatic location recognition includes a marker fixing step (S100), a location recognizing step (S200), an X-ray irradiation step (S300), and a bone density measuring step ( S400).
  • a manager (measurer) of the central controller 300 may fix the marker 20 to at least one of the head, neck, chest, abdomen, or thigh of the subject.
  • the location recognizing step (S200) may recognize the marker 20 fixed to the subject by using the position recognition camera 10 provided in the head unit 100. Can determine the body position information of the.
  • the X-ray source unit 110 provided in the head unit 100 is provided by using the body position information of the subject determined by the central control unit 300 in the location recognition step S200. X-rays may be irradiated to the specific marker 20 fixed to the subject.
  • the central control unit 300 may move the bed unit 200 up, down, left, and right on a plane. Can be.
  • the bone density measurement step (S400) is X-rays passing through a specific marker 20 that is fixed to a specific body part of the subject, that is, the subject in the X-ray detector unit 210 provided in the bed portion 200 To detect the bone, it is possible to generate a bone image in the form of a two-dimensional plane, by receiving it from the central control unit 300 can measure the bone density.
  • the bone density measurement method through automatic location recognition before performing the X-ray irradiation step (S300), distance determination step (S210), obesity calculation step (S220) and the dose control step (S230) may be further included.
  • the distance between the marker 20 and the head part 100 fixed to the subject may be determined.
  • the X-ray control unit 130 including the distance measuring sensor 30 in the head unit 100
  • the distance between the marker 20 and the head part 100 based on the size of the marker 20. Can be determined.
  • the obesity calculation step (S220) may calculate the obesity degree of the subject, according to the distance determined in the distance determination step (S210),
  • the dose control step (S230) may control the X-ray dose emitted from the X-ray source unit 110 by using the obesity degree of the subject measured in the obesity calculation step S220 in the central control unit 300. .
  • the position of a specific body part of the subject is determined based on direct physical contact or eye mass or a general average in order to determine the specific body part of the subject to be measured by the measurer.
  • X-rays were examined, but in this case, not only the accuracy was lowered but also the risk of excessive X-ray exposure at unnecessary portions was very high.
  • the bone density measurement system and automatic measuring method through automatic position recognition by recognizing a plurality of markers 20 is fixed by using a separate position recognition camera 10
  • the body position information of the subject to be determined is determined based on the movement of the subject, rather than moving the bed portion 200 lying on the plane to move the bone density is easy and accurate measurement can be measured with high accuracy have.
  • the central control unit 300 may move the bed unit 200 up, down, left, and right on a plane such that the marker 20 is positioned at the center of the camera image in the position recognition camera 10.

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Abstract

La présente invention concerne un système pour mesurer une densité osseuse par reconnaissance de position automatique et, plus particulièrement, un système de mesure d'une densité osseuse par reconnaissance de position automatique, comprenant: une unité source de rayons X (110) pour générer un faisceau conique de rayons X; une unité principale (100) incluant une unité de reconnaissance de position (120) pour reconnaître une pluralité de marqueurs (20), qui peut être fixée à un sujet de mesure, au moyen d'une caméra de reconnaissance de position (10) et pour déterminer les informations de position du corps du sujet de mesure; une unité de lit (200) qui est conçue pour faire face à l'unité source de rayons X (110) et inclut une unité détecteur de rayons X (210) pour détecter les rayons X qui sont irradiés par l'unité source de rayons X (110) et passent à travers un site spécifique du sujet de mesure, et pour générer une image de l'os à deux dimensions; et une unité de contrôle centrale (300), qui est connectée par le biais d'un câble ou sans fil à l'unité principale (100) et à l'unité de lit (200), pour contrôler l'unité source de rayons X (110) de telle sorte qu'une partie du corps du sujet de mesure à photographier par un élément doseur soit irradiée par les rayons X selon les informations de position du corps déterminées par l'unité de reconnaissance de position (120) et pour déterminer une densité osseuse en recevant l'image de l'os générée par le détecteur de rayons X (210).
PCT/KR2013/009666 2013-10-25 2013-10-29 Système pour mesurer la densité osseuse par reconnaissance de position automatique et procédé de mesure à cet effet WO2015060488A1 (fr)

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CN201380077868.5A CN105358061A (zh) 2013-10-25 2013-10-29 利用自动识别位置的骨密度测量系统及其测量方法

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