WO2006080144A1 - X線計測装置 - Google Patents
X線計測装置 Download PDFInfo
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- WO2006080144A1 WO2006080144A1 PCT/JP2005/022522 JP2005022522W WO2006080144A1 WO 2006080144 A1 WO2006080144 A1 WO 2006080144A1 JP 2005022522 W JP2005022522 W JP 2005022522W WO 2006080144 A1 WO2006080144 A1 WO 2006080144A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ray
- filter
- projection data
- measurement apparatus
- thickness
- Prior art date
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- 238000012937 correction Methods 0.000 claims abstract description 68
- 238000005259 measurement Methods 0.000 claims abstract description 60
- 238000006243 chemical reaction Methods 0.000 claims description 52
- 238000012545 processing Methods 0.000 claims description 52
- 238000010521 absorption reaction Methods 0.000 claims description 29
- 238000007689 inspection Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000012935 Averaging Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013213 extrapolation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- A61B6/4035—Arrangements for generating radiation specially adapted for radiation diagnosis the source being combined with a filter or grating
-
- 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
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
- A61B6/4435—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure
- A61B6/4441—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure the rigid structure being a C-arm or U-arm
-
- 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
- A61B6/542—Control of apparatus or devices for radiation diagnosis involving control of exposure
Definitions
- the present invention relates to an X-ray measurement apparatus capable of obtaining a good three-dimensional image with suppressed detector saturation and improved value uniformity.
- an X-ray measurement device in which an X-ray source and a two-dimensional X-ray detector are placed opposite to each other at both ends of a C-shaped support (hereinafter referred to as a C arm).
- a C arm There is a structure that suspends the C-arm from the ceiling, and a structure that supports the floor force of the C-arm.
- an X-ray measuring device installed on the gantry so that the X-ray source and the two-dimensional X-ray detector are opposed to each other. In these devices, by rotating the C-arm or gantry, it is possible to perform X-ray measurements while rotating the X-ray source and detector pair around the subject.
- a plurality of measurement data obtained by rotational measurement are each corrected to obtain one set of projection data for three-dimensional reconstruction, and three-dimensional reconstruction is performed on the obtained one set of projection data.
- a reconstruction algorithm can be used to obtain a 3D image.
- Non-Patent Document 1 New medical care, October 2002, Vol. 29, No. 10, pp. 102-105
- the X-ray dose reaching the detector increases, and a saturation phenomenon occurs in the detector element where the X-ray dose exceeds the detection limit, and the correct value is not shown.
- a filter made of metal or the like is installed between the X-ray source and the subject in order to suppress the saturation of the detector, it will depend on the type and thickness of the filter.
- the energy distribution of X-rays incident on the subject changes. When reconstruction is performed using X-ray images with different energy distributions, there is a problem that the obtained three-dimensional image cannot show positive U values.
- An object of the present invention is to provide an X-ray measuring apparatus capable of correcting a non-uniformity of a value of a three-dimensional image and obtaining a good three-dimensional image with respect to these problems. .
- the above-mentioned purpose is to detect, as measurement data, an X-ray source that generates X-rays to be irradiated on an inspection object, and transmission X-rays of the inspection object that are arranged so as to sandwich the X-ray source and the inspection object.
- An X-ray detector a filter installed between the X-ray source and the inspection object for adjusting the amount of X-ray transmission, a holding device for holding the X-ray source and the X-ray detector, an X-ray source and an X-ray A rotating device that rotates the X-ray detector around the inspection object, and a control processing device that performs calculation processing of measurement data detected by the X-ray detector at a plurality of angles with respect to the inspection object rotated by the rotating device.
- the control processing unit obtains the projection data by logarithmically converting the measurement data, obtains the X-ray absorption coefficient of the filter corresponding to the obtained projection data, and converts it to the obtained X-ray absorption coefficient.
- the filter thickness is calculated using a predetermined conversion formula.
- a correction coefficient corresponding to the projection data obtained by the thickness of the filtered filter is obtained, the obtained correction coefficient is multiplied by the projection data, and the projection data multiplied by the correction coefficient is reconstructed to obtain a three-dimensional image. It can be achieved by obtaining.
- the saturation phenomenon of the X-ray detection element, the energy of the filter and the subject It is possible to obtain a three-dimensional image that excludes the effects of scattered X-rays that cause changes in the distribution or filters and subject forces.
- FIG. 4 is a conceptual diagram showing, in cross-sectional form, a side view of an example of an X-ray measuring apparatus to which the present invention is applied.
- the X-ray measuring apparatus includes an X-ray source 401, a detector 402, a support 403, a rotating device 404, a bed 405, and a control processing device 406.
- the X-ray source 401 and the detector 402 are installed on the support column 403.
- a C-shaped arm, a U-shaped arm, a gantry, or the like is used.
- Figure 4 shows a C-shaped arm.
- a form in which the support 403 is suspended from the ceiling and a form in which the support 403 is supported from the floor are conceivable.
- the support column 403 is rotated around the subject 408 lying on the bed 405 around the rotation axis 407 by the rotation device 404.
- FIG. 4 shows a case where the rotating shaft 407 and the bed 405 are parallel to the floor as the most general form.
- the rotation axis 407 can be set obliquely with respect to the body axis.
- FIG. 4 shows a case where the X-ray source 401 and the detector 402 are rotated around the rotation axis 407 around the object 408 by the force rotating device 404.
- a configuration is also possible in which the X-ray source 401 and the detector 402 are fixed, and the subject 408 is rotated about the rotation axis 407 by the rotation device 404.
- a configuration in which the X-ray source 401, the detector 402, and the subject 408 rotate around the rotation axis 407 is also possible. In either case, the same rotational measurement can be obtained by considering it as a relative rotational motion.
- the detector 402 may be a planar X-ray detector, a combination of an X-ray image intensifier and a CCD camera, an imaging plate, a CCD detector, a solid state detector, or the like.
- Planar X-ray detectors include a pair of photodiodes and amorphous silicon TFTs arranged on a square matrix and a direct combination of this and a phosphor.
- the X-ray generated from the X-ray source 401 passes through the subject 408, is converted into an electrical signal corresponding to the X-ray intensity by the detector 402, and is input as measurement data to the control processing device 406.
- the control processing unit 406 generates X-rays in the X-ray source 401 and stores data in the detector 402.
- the rotation of the column 403 in the acquisition and rotation device 404 is controlled.
- the X-ray measurement apparatus can perform rotation measurement that generates X-rays and acquires measurement data while rotating the support column 403.
- the control processing device 406 can perform logarithmic conversion processing, reconstruction calculation processing, and the like on the measurement data to acquire three-dimensional data.
- the control processing device 406 is provided outside the detector 402, but a form provided inside the detector 402 is also possible. In that case, high-speed processing is possible.
- a filter 410 can be installed between the X-ray source 401 and the detector 402.
- the filter 410 is made of metal such as aluminum, copper, brass, ceramics, and grease. Most simply, it can be made from a liquid in a case such as plastic resin.
- the filter shape is arbitrary, and the data correction processing described later can be applied to any filter shape.
- the control processing device 406 of the present invention executes processing for correcting non-uniformity of the values of the three-dimensional image.
- the control processing device 406 has a storage device 409 inside, and stores a tape and the like necessary for the correction processing.
- the control processing device 406 has a mode for inputting the presence / absence of execution of correction processing, a switch, or the like as an operation menu.
- Sensitivity data acquisition Measurement is performed by irradiating X-rays while the subject is not set up, and sensor sensitivity data is acquired.
- Offset correction processing Measurement is performed without X-ray irradiation, and detector offset data is acquired. A subject is placed and rotation measurement is performed, and multiple subject data corresponding to the rotation are acquired. Each subject data force also subtracts offset data to obtain subject data after offset correction.
- Sensitivity correction processing Sensitivity data power Offset data is subtracted to obtain sensitivity data after offset correction. Divide subject data after offset correction by sensitivity data after offset correction Then, subject data after sensitivity correction is obtained.
- Logarithmic conversion processing is performed on the subject data after sensitivity correction, and the result is multiplied by 1 to obtain projection data.
- Non-uniformity correction processing Multiply the projection data by the correction coefficient G to obtain non-uniformity corrected data.
- FIG. 1 is a flowchart illustrating a procedure of non-uniformity correction processing according to the first embodiment.
- FIG. 2 is a diagram showing a conversion table A used in the non-uniformity correction process of the first embodiment
- FIG. 3 is a diagram showing a conversion table B used in the non-uniformity correction process of the first embodiment.
- u be the horizontal coordinate and V be the vertical coordinate of the projection data.
- a position v is designated for the projection data A s (u, v) of the subject (step 101).
- the position u is designated for the projection data As (u, v) of the subject (step 102).
- * Correct the u / rape position in Fig. 1) Search the conversion table A for the coordinates (u, V) to obtain the X-ray absorption Af (u, V) of the filter (step 103).
- Equivalent filter thickness Ef (u, V) as filter thickness corresponding to filter X-ray absorption Af (u, V) by conversion formula A (described later) for filter X-ray absorption Af (u, V) ) Is calculated (step 104).
- Conversion table B is searched for the calculated equivalent filter thickness Ef (u, V) and subject projection data As (u, v) to obtain a correction coefficient G (Ef, As) (step 105). . * Corrected notation of G in Figure 3. Although it is a notation of G, the force that subscripted Ef as the last correction is not possible. The subscript notation seems to be impossible, so it is revised again to the form of “G (Ef, As)”. In the text and figures, please use the same notation for G as “G (Ef, As)”. ) If conversion table B does not have the expected equivalent filter thickness Ef (u, V) and subject projection data As (u, V), correction coefficient G (Ef , As).
- the object projection data As (u, v) is multiplied by a correction coefficient G (Ef, As) (step 106).
- the process is executed for all coordinates u (step 107).
- the process is executed for all coordinates V (step 108).
- Processing is performed on all subject projection data (step 109).
- a method of obtaining the conversion table A shown in Fig. 2 will be described.
- a filter 410 used for measuring the subject is installed, and X-rays are irradiated without setting the subject to acquire measurement data.
- the projection data is obtained by performing the offset correction, sensitivity correction, and logarithmic conversion processing described above on the measurement data.
- the projection data value at the coordinates (u, V) is the X-ray absorption amount Af (u, V) of the filter.
- the conversion table A it is also possible to calculate the X-ray absorption amount at an arbitrary coordinate by interpolating the coordinates at several points. In that case, the storage capacity of the table can be reduced.
- the conversion table A can also be held as a conversion expression for calculating the X-ray absorption amount using coordinates as variables. In that case, the storage capacity of the table can be reduced.
- a method for obtaining the conversion formula A will be described.
- a filter 410 having a predetermined uniform thickness Ef is installed, and X-rays are irradiated without setting a subject to acquire measurement data.
- the projection data is obtained by executing the offset correction, sensitivity correction, and logarithmic conversion processing described above on the measurement data.
- An average value is calculated from the projection data, and this is set as the X-ray absorption amount Af of the filter 410.
- a plurality of filters having different thicknesses are prepared as the filter 410, and projection data is acquired for each thickness filter, and an X-ray absorption amount Af for each filter thickness Ef is obtained.
- the filter thickness Ef with respect to the X-ray absorption amount Af is approximated by Equation (1), and the coefficients a, a, a, 1- are obtained.
- a filter 410 having a predetermined uniform thickness Ef is installed, an arbitrary subject is installed, X-rays are irradiated, and measurement data is acquired.
- an arbitrary subject a cylindrical container or an elliptic cylinder container filled with water, an acrylic cylinder, or the like is used.
- the offset correction, sensitivity correction, logarithmic conversion described above Execute processing to obtain projection data As (u, v).
- the ideal projection data Ao (u, V) is divided by the subject projection data As (u, V) to calculate a correction coefficient G (Ef, As).
- a plurality of filters with different thicknesses are prepared as the filter 410, and projection data is acquired using the same arbitrary subject for each filter of the thickness Ef, and subject projection at each filter thickness Ef is performed. Find the correction coefficient G (Ef, As) for data As.
- the correction coefficient G (Ef, As) for the object projection data As is approximated by equation (2), and the coefficients b, b, b,-
- the conversion table B it is also possible to calculate the correction coefficient by interpolation calculation with the filter thickness and subject projection data in increments of several points. In that case, the storage capacity of the table can be reduced.
- Conversion table B can also be held as a conversion equation for calculating a correction coefficient using filter thickness and subject projection data as variables. In that case, the storage capacity of the table can be reduced.
- FIGS. 5 (A) to 5 (C) are diagrams showing three examples of a cross-section (left side) and a perspective view (right side) of the filter 410 cut along the rotation surface of the X-ray source 401.
- FIG. . (A) is a cross-sectional view and a perspective view of the filter 410 having a uniform thickness as a whole
- (B) is a filter 410 that also has a combined force of a region having a concave surface and a region having a uniform thickness
- (C) is a combination of a concave area, a convex area, and a uniform thickness area.
- FIG. 6 is a cross-sectional view and a perspective view of the filter 410.
- X-rays are indicated with arrows on the cross-sectional view. It is also possible to make the X-ray incident direction opposite to the arrow.
- Fig. 5 (A)-(C) if the filter shape is bilaterally symmetric, the X-ray absorption amount of the filter is bilaterally symmetric with respect to the center of the filter. A storage capacity can be halved. If the filter shape is the same in the depth direction of the cross section, the X-ray absorption amount of the filter will be the same in every cross section, and the calculation amount of absorption amount and the storage capacity of Table A can be reduced.
- FIGS. 6A to 6C are a cross-sectional view and a plan view showing another shape of the filter 410.
- FIG. Fig. 6 (B) is a plan view of the incident direction force of X-ray
- Fig. 6 (A) is a cross-sectional view at the A-A position in the arrow direction
- Fig. 6 (C) is the B-B position. It is sectional drawing seen in the arrow direction.
- the filter 410 also has a combined force of a region having a concave force and a region having a constant value force at the position A—A.
- the thickness of the filter changes at the top at the BB position.
- the shape of the filter is viewed from the X-ray incident direction, it is the same as in Fig. 6 (B), and in the A-A cross section, as in Fig. 5 (C), a region with concave force and a region with convex surface And a region with a uniform thickness, the thickness changes at the top of the filter in the B-B cross section, and the boundary between the region with a concave surface and the region with a uniform thickness is a convex shape. It is also possible to
- the filter 410 shown in FIG. 5 (A) performs measurement so that the subject is relatively flat in the measurement region (detection region of the detector 402) and prevents saturation of the detector 402 on average.
- the filter 410 shown in FIGS. 5 (B) and 5 (C) is useful for measurement in which the thickness of the subject rapidly decreases on both sides in the measurement region.
- the example in Fig. 6 is also useful for measurements where the thickness of the subject decreases rapidly even at the top of the measurement area.
- the filter 410 shown in FIG. 5 (C) has a configuration in which a cross-sectional shape force of the filter has a convex arc next to the concave arc, and a straight line next to it.
- the tangent line at the intersection of the concave arc and the convex arc has the same inclination
- the tangent line at the intersection of the convex arc and the straight line has the same inclination.
- a good 3D image can be obtained.
- FIG. 6 when the thickness of the filter changes in the direction of the rotation center axis of the rotating device, shapes such as the head having different thicknesses in the body axis direction are formed. A good 3D image can be obtained for the inspection target.
- an average value is calculated in the projection data acquired in a state in which a filter with a predetermined uniform thickness is installed and an inspection target is not installed, and a plurality of filter thicknesses are obtained.
- the average value is obtained for the filter, and the average value is approximated to the filter thickness with a polynomial, and a conversion formula that expresses the relationship between the X-ray absorption amount of the filter and the filter thickness is created. Correction processing is possible for existing filters.
- projection data is obtained in a state where a filter with a predetermined uniform thickness is installed and an arbitrary subject is installed, and the value of the reconstructed image is uniform.
- Find the projection data for the inspection target calculate the correction coefficient by dividing the ideal projection data by the projection data for the inspection target, obtain the correction coefficient for multiple thickness filters, and determine the thickness of the filter and the inspection target.
- correction processing can be performed on an inspection object having an arbitrary shape.
- projection data is obtained in a state where an arbitrary subject is installed by installing a filter having an arbitrary shape instead of a filter having a uniform thickness. Then, the projection data of the ideal inspection object with uniform reconstructed image values is obtained, the ideal projection data is divided by the projection data of the inspection object, the correction coefficient is calculated, and the filter for multiple thicknesses is calculated.
- the correction process is performed by the filter having the shape on the inspection object having an arbitrary shape. It becomes possible.
- the inspection object can be simply and accurately simulated and the correction coefficient can be obtained.
- a conversion table and a conversion formula are prepared one by one. Said about the case.
- the control processing unit 406 stores the plurality of conversion tables and the set of conversion formulas, and selects them according to the photographing conditions and uses them for the correction processing.
- the accuracy of correction can be improved.
- a plurality of sets selected from a plurality of stored conversion tables and conversion formulas according to shooting conditions, and correction that fits any shooting conditions by interpolation or extrapolation of those sets. It is conceivable to calculate the coefficient and use it for correction processing. As a result, it is possible to realize correction with high accuracy for any shooting condition.
- the saturation of the detector is suppressed except for the saturation phenomenon of the X-ray detection element, the change in the energy distribution due to the filter and the subject, or the influence of the scattered X-ray that also generated the filter and subject force. Therefore, it is possible to provide an X-ray measuring apparatus capable of obtaining a good three-dimensional image with improved value uniformity.
- FIG. 1 is a flowchart showing a procedure of non-uniformity correction processing according to a first embodiment.
- FIG. 2 is a diagram showing a conversion table A used in the non-uniformity correction process according to the first embodiment.
- FIG. 3 is a diagram showing a conversion table B used in the non-uniformity correction process according to the first embodiment. ⁇ 4] It is a conceptual diagram showing, in the form of a cross section, a side view of an example of an X-ray measuring apparatus to which the present invention is applied
- FIGS. 5A to 5C are diagrams showing three examples of a cross section (left side) and a perspective view (right side) in which the filter 410 is cut along the rotation surface of the X-ray source 401.
- A is a cross-sectional view and a perspective view of the filter 410 having a uniform thickness as a whole
- (B) is a filter 410 that also has a combined force of a region having a concave surface and a region having a uniform thickness
- (C) is a sectional view and a perspective view of the filter 410 comprising a combination of a concave area, a convex area, and a uniform thickness area.
- FIG. 6 (A)-(C) are a sectional view and a plan view showing another shape of the filter 410, and (B) Is a plan view as seen from the X-ray incident direction, (A) is a cross-sectional view as seen in the arrow direction at the A-A position, and (C) is a cross-sectional view as seen in the arrow direction at the BB position.
- 401 X-ray source
- 402 detector
- 403 support
- 404 rotating device
- 405 bed
- 406 control processing device
- 407 rotating shaft
- 408 subject
- 409 storage device
- 410 filter.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/722,802 US7515689B2 (en) | 2005-01-27 | 2005-12-08 | X-ray measuring instrument |
JP2007500431A JP4599392B2 (ja) | 2005-01-27 | 2005-12-08 | X線計測装置 |
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JP2005-019285 | 2005-01-27 | ||
JP2005019285 | 2005-01-27 |
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WO2006080144A1 true WO2006080144A1 (ja) | 2006-08-03 |
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PCT/JP2005/022522 WO2006080144A1 (ja) | 2005-01-27 | 2005-12-08 | X線計測装置 |
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US (1) | US7515689B2 (ja) |
JP (1) | JP4599392B2 (ja) |
CN (1) | CN100579453C (ja) |
WO (1) | WO2006080144A1 (ja) |
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DE10201321B4 (de) * | 2002-01-15 | 2011-02-24 | Siemens Ag | Computertomographie-Gerät und Verfahren mit aktiver Anpassung der Mess-Elektronik |
JP4512187B2 (ja) * | 2004-07-06 | 2010-07-28 | 株式会社日立メディコ | X線計測装置 |
US8218715B2 (en) * | 2007-05-31 | 2012-07-10 | General Electric Company | Methods and systems to facilitate correcting gain fluctuations in iterative image reconstruction |
DE102009012631B4 (de) * | 2009-03-11 | 2011-07-28 | Bayer Schering Pharma Aktiengesellschaft, 13353 | Filter für einen Computertomographen sowie Computertomograph |
CN101587052B (zh) * | 2009-06-15 | 2011-03-30 | 浙江大学 | 基于x射线的密度、浓度和厚度测试装置及方法 |
WO2012093440A1 (ja) | 2011-01-07 | 2012-07-12 | 株式会社 東芝 | X線ct装置 |
US10667767B2 (en) * | 2014-05-02 | 2020-06-02 | General Electric Company | Systems and methods for selecting bowtie filter configuration |
JP6165695B2 (ja) * | 2014-09-24 | 2017-07-19 | 富士フイルム株式会社 | 放射線画像解析装置および方法並びにプログラム |
CN104475462B (zh) * | 2014-11-24 | 2016-08-24 | 北京金自天正智能控制股份有限公司 | 一种x射线测厚仪的在线校正装置及方法 |
CN105433973B (zh) * | 2015-12-30 | 2018-09-18 | 沈阳东软医疗系统有限公司 | Ct扫描设备、ct系统和控制过滤器组件的方法及装置 |
CN106955118B (zh) * | 2017-04-11 | 2020-04-17 | 沈阳开普医疗影像技术有限公司 | Ct形状过滤器缺陷的单能矫正方法 |
CN107179650A (zh) * | 2017-05-12 | 2017-09-19 | 太仓诚泽网络科技有限公司 | 一种基于射线的摄影方法 |
CN110353712B (zh) * | 2019-07-19 | 2023-07-21 | 深圳安科高技术股份有限公司 | 一种滤波器、调节ct系统射线束的方法及装置 |
JP7249666B2 (ja) * | 2020-10-30 | 2023-03-31 | 株式会社リガク | 蛍光x線分析装置 |
KR102530973B1 (ko) * | 2021-06-25 | 2023-05-16 | (주)아이스트 | 2차 전지 x-선 검사를 위한 보정 데이터 취득 장치 및 방법 |
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US6418193B1 (en) * | 1999-11-01 | 2002-07-09 | General Electric Company | Imaging system including radiation filter for x-ray imaging |
DE10035984C1 (de) * | 2000-07-24 | 2002-01-31 | Siemens Ag | Röntgen-Computertomographieeinrichtung |
JP2002102217A (ja) * | 2000-09-28 | 2002-04-09 | Ge Medical Systems Global Technology Co Llc | X線ctシステム、ガントリ装置、コンソール端末及びその制御方法及び記憶媒体 |
DE10048775B4 (de) * | 2000-09-29 | 2006-02-02 | Siemens Ag | Röntgen-Computertomographieeinrichtung |
US6990171B2 (en) * | 2003-10-27 | 2006-01-24 | General Electric Company | System and method of determining a user-defined region-of-interest of an imaging subject for x-ray flux management control |
-
2005
- 2005-12-08 US US11/722,802 patent/US7515689B2/en not_active Expired - Fee Related
- 2005-12-08 JP JP2007500431A patent/JP4599392B2/ja not_active Expired - Fee Related
- 2005-12-08 WO PCT/JP2005/022522 patent/WO2006080144A1/ja active Application Filing
- 2005-12-08 CN CN200580046148A patent/CN100579453C/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003339686A (ja) * | 2002-05-29 | 2003-12-02 | Shimadzu Corp | X線撮影装置 |
JP2004305349A (ja) * | 2003-04-04 | 2004-11-04 | Ge Medical Systems Global Technology Co Llc | X線ct装置における補正係数算出方法、ビームハードニング後処理方法およびx線ct装置 |
Also Published As
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JPWO2006080144A1 (ja) | 2008-06-19 |
CN100579453C (zh) | 2010-01-13 |
US7515689B2 (en) | 2009-04-07 |
JP4599392B2 (ja) | 2010-12-15 |
US20080043900A1 (en) | 2008-02-21 |
CN101098660A (zh) | 2008-01-02 |
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