KR101743469B1 - X-ray inspection device and its inspection method - Google Patents

X-ray inspection device and its inspection method Download PDF

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KR101743469B1
KR101743469B1 KR1020150159049A KR20150159049A KR101743469B1 KR 101743469 B1 KR101743469 B1 KR 101743469B1 KR 1020150159049 A KR1020150159049 A KR 1020150159049A KR 20150159049 A KR20150159049 A KR 20150159049A KR 101743469 B1 KR101743469 B1 KR 101743469B1
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South Korea
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subject
ray
size
shape
leaves
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KR1020150159049A
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KR20170055806A (en
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권순무
강영한
박병훈
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대구보건대학교산학협력단
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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
    • A61B6/06—Diaphragms
    • 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
    • A61B6/10—Safety means specially adapted therefor
    • A61B6/107—Protection against radiation, e.g. shielding
    • 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
    • A61B6/502—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 breast, i.e. mammography
    • 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
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
    • A61B6/5217—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data extracting a diagnostic or physiological parameter from medical diagnostic data
    • 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
    • A61B6/54—Control of apparatus or devices for radiation diagnosis

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
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  • Radiology & Medical Imaging (AREA)
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  • High Energy & Nuclear Physics (AREA)
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  • General Health & Medical Sciences (AREA)
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  • Oral & Maxillofacial Surgery (AREA)
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  • Computer Vision & Pattern Recognition (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

More particularly, the present invention relates to an X-ray inspection apparatus and method, and more particularly, to an X-ray inspection apparatus for detecting the shape and size of an object to be inspected at a lower portion of an X-ray tube and adjusting a diaphragm accordingly, And to provide an X-ray inspection apparatus and method for enabling a precise photographing and diagnosis to be performed while reducing an exposure dose significantly.

Description

[0001] X-ray inspection apparatus and method [0002]

More particularly, the present invention relates to an X-ray inspection apparatus and method, and more particularly, to an X-ray inspection apparatus for detecting the shape and size of an object to be inspected at a lower portion of an X-ray tube and adjusting a diaphragm accordingly, And to provide an X-ray inspection apparatus and method for enabling a precise photographing and diagnosis to be performed while reducing an exposure dose significantly.

In general, a medical diagnostic x-ray imaging apparatus irradiates an x-ray (X-ray) to a human body to be inspected and detects the difference in energy intensity distribution of the x-ray acquired from the x-ray detector through the human body. , Chest diseases, and so on.

However, in the conventional X-ray photographing apparatus, the X-ray irradiation field is adjusted so as to match the size of the X-ray detector irrespective of the size of the subject. In this case, since unnecessary exposure to radiation is increased, the field of view of the X- .

In this way, the reduction of the field of view makes the structure more clearly observed and the contrast of the image is increased, so that the image of excellent image quality is obtained. This can reduce the unnecessary field to reduce the second scattering line, This is because there are few steps but short-scale contrast and high resolution with clear boundaries.

The adjustment of the X-ray irradiation field is performed by a collimator 20 attached to the lower portion of the X-ray tube 10 for generating X-rays as shown in FIG. 1, Like leafs 22 and 24 made of a material capable of attenuating the X-rays, and the plate-like leaves 22 are arranged in the X-axis (left-right) direction and the Y- And the area irradiated with the X-ray is adjusted in the form of a quadrangle.

According to the conventional iris structure as described above, it is impossible to precisely adjust the irradiation field. Therefore, as shown in FIG. 3, an area deviating from the lesion diagnosis area is included in the irradiation field, thereby generating unnecessary radiation exposure to the patient.

Accordingly, studies have been conducted to adjust the field of view. For example, in Korean Patent Laid-Open Publication No. 10-2014-0091998, a touch sensor is mounted on an X-ray detector for detecting X-rays transmitted through a subject and acquiring X-ray data, A device for calculating the position and size of the object to be inspected based on the output value of the touch sensor and controlling the stop (collimator) according to the result.

However, in the prior art described above, since the touch sensor is provided in the lower part of the object to be inspected, in the case of a subject having a cross-sectional area that is not the same but has a large difference, in the case of a subject having a larger cross- There is a possibility that an accurate diagnosis can not be made because a part of the subject is not photographed, and when the shape and size of the subject are squeezed to check the shape and size of the subject, the shape and size of the subject can not be accurately confirmed, There is a problem in that an accurate image can not be obtained.

Since the X-ray detector is provided with a touch sensor on the X-ray detector, the X-ray is detected by the X-ray detector through the touch sensor, so that the image quality may be negatively affected due to loss of image information or generation of additional scattered rays while passing through the touch sensor.

These problems are common to other mammograms as well as breast examinations.

An object of the present invention is to provide a method and an apparatus for detecting a shape of an object to be inspected and an X-ray tube, The present invention provides an X-ray photographing apparatus and method for positioning an X-ray tube under the X-ray tube at the time of size confirmation and removing the X-ray tube from the bottom of the X-ray tube when the size confirmation of the subject is completed, There is a purpose.

Also, since the diaphragm is constituted by a plurality of leaves and the position of each leaf is made different according to the size of the inspection object obtained by the recognition unit, an irradiation field matching the shape and size of the inspection object can be obtained so that unnecessary scattering is reduced, And to reduce the dose of the human body.

Then, the above-mentioned recognition unit is used to simultaneously read a breast mammogram obtained by an X-ray and a breast thermogram obtained by a thermography camera at the time of diagnosis of a breast disease such as breast cancer, Another goal is to improve the sensitivity and specificity of the lesion diagnosis.

In addition, since the diaphragm has a plurality of leaves arranged therein, the X-ray passes through the gap between the leaves to increase the exposure dose of the subject, so that the boundaries of the leaves are formed so as to overlap each other, Or the leaf is placed vertically and horizontally in a zigzag manner so that the X-ray transmission is blocked, thereby preventing an increase in the dose of radiation even when multiple leaves are used.

According to an aspect of the present invention, there is provided an image processing apparatus comprising: a recognizing unit provided between an object to be examined and an X-ray tube and installed to be movable by a transferring unit to acquire images of the object to be inspected; A diaphragm which is constituted by a plurality of leaves, each diaphragm being independently movable in position, the diaphragm adjusting an irradiation field; In order to recognize the shape and size of the subject according to the image obtained from the recognition unit, the recognition unit is disposed below the X-ray tube, and upon recognition of the shape and size of the subject, And a controller for controlling operations of the X-ray photographing apparatus, including the transferring means and the driving means, for adjusting the amount of movement of the leaves constituting the diaphragm so as to match the shape and size of the object recognized by the recognizing unit Wherein the radiation dose is reduced and an accurate image can be obtained.

In the above, the recognizing unit uses a thermal camera or an image camera.

A plurality of leaves constituting the diaphragm may be formed in a stepped manner so that the boundaries thereof are overlapped with each other, or the edges of the leaves may be inclined, or the leaves may be arranged in an up-down double-zigzag fashion with both end positions shifted vertically.

Another feature of the present invention resides in a subject recognition step of recognizing the shape and size of a subject by disposing a recognition unit capable of being moved between the subject and an X-ray tube so that the recognition unit is placed under the X-ray tube before X- An irradiation field adjusting process of adjusting an amount of movement of the plurality of leaves constituting the iris according to the shape and size of the subject obtained through the carcass recognition process to adjust the x-ray irradiation field to the shape and size of the subject; A recognition unit removing step of moving the recognition unit and removing the recognition unit from the lower part of the X-ray tube when the shape and size of the subject are recognized through the recognition process; And an X-ray imaging method comprising an X-ray imaging process in which an irradiation field is adjusted according to the shape and size of the subject and an X-ray imaging image is acquired after the recognition unit is removed from the X-ray tube.

According to the present invention configured as described above, when recognizing the shape and size of the subject, the recognition unit is moved to the lower portion of the X-ray tube to recognize the shape and size of the subject on the same axis as the X- It is possible to obtain an accurate irradiation field. When the subject is actually photographed, the recognition part is removed from the lower part of the X-ray tube, thereby preventing the recognition part from acting as an obstacle in X-ray imaging.

In addition, by moving a plurality of leaves according to the shape and size of the subject, it is possible to obtain an irradiation field that matches the shape and size of the subject, thereby reducing unwanted scattering, thereby enabling accurate images to be obtained, .

In addition, when the thermography camera is used as the recognition unit, it is possible to simultaneously read the mammogram by the X-ray and the thermogram of the breast obtained by the thermography camera at the time of diagnosis of breast diseases such as breast cancer Sensitivity and specificity of breast lesion diagnosis can be improved.

Further, by controlling the side end shape or the arrangement position of the leaf, transmission of X-rays through the leaf-to-leaf boundary is suppressed, thereby preventing unnecessary exposure to the subject.

1 is a view showing a conventional X-ray photographing apparatus
2 is a view showing a conventional iris configuration;
3 is a view showing an irradiation field by a conventional iris;
4 is a view showing an X-ray photographing apparatus according to the present invention
5 is a view showing an iris configuration according to the present invention
6 is a view showing a leaf cross-sectional structure according to the present invention
Figs. 7 to 9 are views showing a leaf side sectional structure
10 is a view showing another embodiment of an X-ray imaging apparatus according to the present invention
11 to 12 are views showing an irradiation field according to the present invention
13 is a diagram showing an example of outputting a thermographic image according to the present invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 and 5, the X-ray inspection apparatus according to the present invention includes an X-ray tube 110 for generating an X-ray, an X-ray tube 110 disposed between the X-ray tube 110 and the subject, A recognition unit 120 for acquiring an image of a subject to be examined and a plurality of leaves 132 and each leaf 132 is independently movable by a driving means 134, The recognition unit 120 is disposed under the X-ray tube 110 to acquire an image of the subject to recognize the shape and size of the subject, and the recognition of the shape and size of the subject is completed The X-ray tube 110 is removed from the lower portion of the X-ray tube 110 and the X-ray tube 110 is moved to adjust the amount of movement of the leaves 132 constituting the diaphragm 130 according to the shape and size of the X- Constituting the inspection device And a control unit (not shown) for controlling the operation of each device.

In this case, the recognizing unit 120 uses a body-temperature camera for acquiring a body image, or a video camera for acquiring a visual image of a breast.

The conveying means 122 includes a conveying belt 122a provided with a recognition unit 120 at one end thereof, a guide 122b for guiding movement of the conveying belt 122a, And a driving source 122c such as a motor or a cylinder for moving the motor 122b along the motor 122c.

4 and 5, the diaphragm 130 has a plurality of leaves 132 arranged in one direction, and the movement amounts of the leaves 132 are controlled by driving means 134, For this purpose, a guide 134a for guiding the movement of each of the plurality of openings 132 is formed, and a drive source 134b such as a motor or the like may be provided in each of the leaves 132, Various design changes are possible, so a detailed description is omitted.

4, the guide 134a for guiding the movement of the leaf 132 is arranged on the upper and lower sides of each leaf 132, as shown in FIG. 4, So as not to interfere with the positioned, horizontally arranged leaves.

The leaf 132 is formed mainly of tungsten or lead for x-ray shielding. The tungsten is not easily processed, and the abrasion due to the lead is high, so that the leaf is tungsten or lead The stainless steel layer 132b and the stainless steel layer 132b to perform machining such as machining necessary for the stainless steel layer, for example, rack machining when the leaf is moved back and forth by a rack and pinion structure.

Since the plurality of the leaves 132 are arranged, the X-rays must not be transmitted through the boundaries of the leaves 132. Thus, the leaves 132 are formed such that the adjacent side end faces are overlapped with each other, As shown in FIG. 9, the leaves may be arranged in two rows of upper and lower halves as shown in FIG. 9, and the boundary portions of the leaves may be arranged in a zigzag fashion so as to be shifted up and down.

4, the recognition unit and iris structure may be integrally formed with the X-ray tube in one case, or may be formed as a separate module as shown in FIG. 10, so that the X- Or the like.

The control unit monitors the subject by disposing the recognition unit 120 under the X-ray tube 110 before taking the X-ray, and the image is transmitted to the control unit, The shape and size of the subject are recognized. When the shape and the size of the subject are confirmed, as shown in FIGS. 11 and 12, the amount of movement of the plurality of leaves constituting the diaphragm is adjusted, In order to recognize the shape and size of the subject, the recognition part placed under the X-ray tube is removed from the bottom of the X-ray tube.

After the field of view is secured and obstacles are removed, x-ray imaging is performed to obtain x-ray images.

In this process, the body heat image recognized through the recognition unit is transmitted to the medical image information delivery system (PACS) and used for diagnosis. As shown in FIG. 13, the body image obtained in the X- .

110: X-ray tube 120: Recognition unit
130: aperture 132: leaf

Claims (7)

A recognizing unit 120 arranged between the x-ray tube 110 and the subject and moved by the feeding unit 122 to obtain a thermography image of the subject,
A diaphragm 130 disposed below the x-ray tube 110 and having a plurality of leaves 132 arranged vertically and horizontally and each leaf 132 being independently movable by a driving means 134,
The recognition unit 120 is disposed on the same axis as the center axis of the x-ray tube 110 to recognize the shape and size of the subject, The shape and size of the subject are recognized from the image of the subject and the amount of movement of the leaves 132 constituting the diaphragm 130 is adjusted according to the shape and the size of the recognized subject, A control unit (not shown) for removing the recognition unit 120 from the lower portion of the X-ray tube 110 at the time of shooting; And an X-ray detector. delete The X-ray inspection apparatus according to claim 1, wherein the leaf (132) is formed of a dual structure of a tungsten layer or a lead layer (132a) and a stainless steel layer (132b) to process a stainless steel layer. 2. The x-ray inspection apparatus according to claim 1, wherein the leaves (132) are formed at both ends in a step-like manner so that adjacent side end faces overlap each other. The X-ray inspection apparatus according to claim 1, wherein both sides of the leaf (132) are inclined. 2. The x-ray inspection apparatus according to claim 1, wherein the leaves (132) are arranged in two rows in a vertical direction, and the boundary portions of the leaves are arranged in a zigzag fashion in a vertical direction. A recognition unit configured by a thermoregulatory camera that is moved between an object to be examined and an X-ray tube to acquire a thermography image of an object to be examined, and the recognition unit is disposed on the same axis as the axis of the X- A subject recognition process for recognizing the size;
An irradiation field adjustment process for adjusting the X-ray irradiation field to the shape and size of the subject by adjusting the movement amounts of the plurality of leaves constituting the iris, the irradiation field being arranged vertically and horizontally according to the shape and size of the subject obtained through the process of recognizing the subject. ;
A recognition unit removing step of moving the recognition unit and removing the recognition unit from the lower part of the X-ray tube when the shape and size of the subject are recognized through the recognition process;
And an X-ray photographing process in which an irradiation field is adjusted according to the shape and size of the subject, and an X-ray photographing image is obtained after the recognizing unit is removed from the bottom of the X-ray tube.
KR1020150159049A 2015-11-12 2015-11-12 X-ray inspection device and its inspection method KR101743469B1 (en)

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KR102314902B1 (en) 2019-08-20 2021-10-21 한국원자력의학원 The dose adjustment apparatus that can be installed in diagnostic radiology apparatus and the system comprising that

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001509898A (en) 1997-09-29 2001-07-24 アイン−ガル，モシェ Multi-layer multi-leaf collimator
JP2013158431A (en) * 2012-02-03 2013-08-19 Toshiba Corp X-ray diagnostic apparatus
JP2014042732A (en) * 2012-08-28 2014-03-13 Ge Medical Systems Global Technology Co Llc Radiation detector and radiation imaging apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001509898A (en) 1997-09-29 2001-07-24 アイン−ガル，モシェ Multi-layer multi-leaf collimator
JP2013158431A (en) * 2012-02-03 2013-08-19 Toshiba Corp X-ray diagnostic apparatus
JP2014042732A (en) * 2012-08-28 2014-03-13 Ge Medical Systems Global Technology Co Llc Radiation detector and radiation imaging apparatus

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