WO2019202722A1 - Appareil de radiographie numérique - Google Patents

Appareil de radiographie numérique Download PDF

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Publication number
WO2019202722A1
WO2019202722A1 PCT/JP2018/016240 JP2018016240W WO2019202722A1 WO 2019202722 A1 WO2019202722 A1 WO 2019202722A1 JP 2018016240 W JP2018016240 W JP 2018016240W WO 2019202722 A1 WO2019202722 A1 WO 2019202722A1
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WO
WIPO (PCT)
Prior art keywords
ray
unit
body thickness
parameter
input
Prior art date
Application number
PCT/JP2018/016240
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English (en)
Japanese (ja)
Inventor
知宏 中矢
和義 西野
大介 能登原
Original Assignee
株式会社島津製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社島津製作所 filed Critical 株式会社島津製作所
Priority to CN201880092579.5A priority Critical patent/CN111989043B/zh
Priority to PCT/JP2018/016240 priority patent/WO2019202722A1/fr
Priority to JP2020514880A priority patent/JP7147842B2/ja
Publication of WO2019202722A1 publication Critical patent/WO2019202722A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment

Definitions

  • the present invention includes an X-ray irradiation unit that irradiates a subject with X-rays, a detection unit that detects X-rays irradiated from the X-ray irradiation unit and passed through the subject, and a plurality of parameters.
  • the present invention relates to an X-ray imaging apparatus including a control unit that controls an X-ray irradiation unit under predetermined imaging conditions, and particularly relates to a technique for setting imaging conditions according to body thickness.
  • the conventional X-ray imaging apparatus 100 includes an X-ray irradiation unit 110 that irradiates a subject M with X-rays, a detection unit 120 that detects X-rays that have passed through the subject 180, and a detection output from the detector 120.
  • An image processing unit 133 that forms an X-ray image based on the signal, an input unit 130 to which imaging conditions are input, an X-ray tube control unit 111 and an apparatus drive control unit based on the imaging conditions input to the input unit 130
  • the control part 170 which controls 112 is provided.
  • the X-ray tube control unit 111 controls the intensity (irradiation time, X-ray tube current) and characteristics (X-ray tube voltage) of the X-rays irradiated to the subject by sending a control signal to the X-ray irradiation unit 110.
  • the apparatus drive control unit 112 controls the distance (SID) between the X-ray irradiation unit 110 and the subject M by driving the X-ray irradiation unit 110 and the detection unit 120.
  • the setting value of the SID or the X-ray irradiation unit 110 is changed by setting appropriate imaging conditions at the input unit 130. It was. Since the change of the setting value depends on the user's experience, there are a plurality of types of parameters that can be changed, but the user conventionally changes only a specific type of parameter. It is not easy for the user to come up with a parameter other than a specific parameter.
  • the tube current increases the load on the X-ray generator and the bulb, so even if the subject's body thickness is large, the tube current increases depending on the type of imaging and the specifications of the X-ray imaging device. You may want to avoid. In that case, it is possible to take measures by changing the SID and exposure time.
  • the best imaging conditions vary depending on the specifications of the X-ray imaging apparatus, the type of imaging, the condition of the subject, the measurement environment, and the like. That is, the parameters automatically changed by the machine do not always constitute the optimum shooting conditions.
  • an X-ray imaging apparatus includes an X-ray irradiation unit that irradiates a subject with X-rays, and a detection that detects X-rays that have been irradiated from the X-ray irradiation unit and passed through the subject.
  • At least X-ray irradiation unit with predetermined imaging conditions composed of a plurality of types of X-ray condition parameters set in the X-ray irradiation unit and position parameters indicating a positional relationship between the X-ray irradiation unit and the detection unit
  • a parameter that should be changed from the first imaging condition in accordance with the input of body thickness information which is an X-ray imaging apparatus that includes a control unit that controls the body thickness and an input unit that inputs body thickness information of the subject.
  • a display unit that displays a plurality of types of options, and a selection unit configured to be able to select one of a plurality of parameter types displayed on the display unit, and the control unit has a body thickness input to the input unit Based on the information and the type of the selected parameter, the second imaging condition Determined, and performs control based on the second imaging condition.
  • imaging can be performed under more optimal conditions in consideration of the specifications of the apparatus, the condition of the subject, the measurement environment, and the like. Therefore, it is possible to reduce the burden on the user and reduce unnecessary exposure of the subject due to re-imaging.
  • the first imaging condition in the X-ray imaging apparatus of the present invention may be configured by an X-ray condition parameter and a position parameter that are set when body thickness information is input.
  • the first imaging condition in the X-ray imaging apparatus of the present invention may be configured by an X-ray condition parameter and a position parameter set assuming imaging of a subject having a standard body thickness.
  • the display unit in the X-ray imaging apparatus of the present invention may display an estimated value indicating the degree of parameter change together with the parameter type. If comprised in this way, the user can determine an imaging condition more easily.
  • the parameters are the current input to the X-ray irradiation unit, the voltage input to the X-ray irradiation unit, the time for which the X-ray irradiation unit irradiates X-rays, and the metal filter to be used May be included.
  • the input unit in the X-ray imaging apparatus of the present invention may be configured to be manually input. With this configuration, the configuration of the apparatus can be simplified as compared with a case where the input is automatically performed from an external apparatus.
  • the input unit in the X-ray imaging apparatus of the present invention may be configured to be automatically input from an external device. If comprised in this way, compared with the case where a user inputs manually, imaging
  • the information on the body thickness may be an X-ray imaging image. If comprised in this way, body thickness information can be acquired automatically, without adding an additional structure to an X-ray imaging apparatus.
  • control unit in the X-ray imaging apparatus of the present invention may have a storage table, and may determine the second imaging condition based on information in the storage table.
  • bone density may be measured by a DEXA (dual-energy X-ray absorptiometry) method.
  • the X-ray imaging apparatus of the present invention it is possible to consider a parameter change that the user has not conventionally thought of.
  • imaging can be performed under more optimal conditions in consideration of the specifications of the apparatus, the condition of the subject, the measurement environment, and the like. Therefore, it is possible to reduce the burden on the user and reduce unnecessary exposure of the subject due to re-imaging.
  • FIG. 1 is a schematic diagram illustrating a configuration of an X-ray imaging apparatus according to Embodiment 1.
  • FIG. 3 is a flowchart illustrating the operation of a control unit in the X-ray imaging apparatus according to Embodiment 1. It is a figure explaining the aspect of the display part in the X-ray imaging apparatus which concerns on Example 1, and a selection part.
  • 3 is a flowchart illustrating the operation of a control unit in the X-ray imaging apparatus according to Embodiment 1.
  • 3 is a diagram illustrating a storage table in the X-ray imaging apparatus according to Embodiment 1.
  • FIG. 6 is a schematic diagram illustrating a configuration of an X-ray imaging apparatus according to Embodiment 2.
  • FIG. FIG. 6 is a schematic diagram illustrating a configuration of an X-ray imaging apparatus according to Embodiment 3. It is the schematic explaining a prior art.
  • Embodiment 1 of the present invention will be described below with reference to the drawings.
  • the X-ray imaging apparatus 1 includes an X-ray tube 10, a detector 20, and a top plate 80 as shown in FIG.
  • the top plate places the subject M in a horizontal posture.
  • the X-ray tube 10 irradiates the subject M with X-rays.
  • the X-ray tube 10 and the detector 20 are disposed to face each other with the top plate interposed therebetween.
  • the detector 20 detects X-rays that have been irradiated and transmitted from the X-ray tube 10 toward the subject M, converts them into electrical signals, and outputs them as X-ray detection signals.
  • a flat panel detector is used as the detector 20.
  • the X-ray tube control unit 11 is connected to the X-ray tube 10 and controls the tube voltage, tube current, pulse width and the like of the X-ray tube 10 based on the output of the control unit 70. By performing these controls, the X-ray tube control unit 11 can control the X-ray dose irradiated from the X-ray tube 10, the timing of X-ray irradiation, and the like.
  • the device drive control unit 12 changes the position of the X-ray tube in the Z-axis direction based on the output of the control unit 70. That is, the distance (SID) between the X-ray tube 10 and the subject M and the distance from the detector 20 can be changed.
  • the X-ray imaging apparatus 1 further includes a touch panel display TD and a control unit 70.
  • the touch panel display TD includes an input unit 30, a display unit 50, and a selection unit 60.
  • the input unit 30 receives body thickness information of the subject M by the user. In the first embodiment, the body thickness information of the subject M is the measured body thickness of the subject M.
  • the display unit 50 displays a plurality of types of parameters to be changed as options based on the output of the control unit 70.
  • the selection unit 60 selects one of a plurality of options by the user.
  • the control unit 70 calculates the type of parameter to be changed based on the output from the input unit 30 and outputs the result to the display unit 50. Thereafter, based on the output from the selection unit 60, a control signal is output to the X-ray tube control unit 11 and the device drive control unit 12.
  • the control unit 70 has a storage table 41.
  • the storage table 41 stores numerical values of various parameters referred to for control of the X-ray control unit 11 and the apparatus drive control unit 12 in association with body thickness information. These numerical values are desirably obtained in advance by experiments, simulations, or the like.
  • Step S0 It is assumed that the X-ray imaging apparatus 1 is set to standard imaging conditions when bone density measurement by the DEXA method is performed.
  • the standard imaging condition is an imaging condition corresponding to the standard body thickness, and each parameter of the imaging condition is set to a value that is considered optimal in consideration of the specifications of the apparatus.
  • the standard body thickness is a reference value for the body thickness of an adult subject having a standard body type.
  • the set values of the parameters of the standard photographing conditions in the present embodiment are shown at 54 in FIG.
  • the standard shooting conditions in this embodiment are an example of the first shooting conditions in the present invention.
  • the user measures the body thickness of the subject M and inputs the result to the input unit 30.
  • the measuring method of body thickness is not limited, For example, measuring using a tape measure etc. can be considered.
  • Information on the body thickness input to the input unit 30 is output to the control unit 70.
  • the step S0 is completed.
  • the body thickness of the subject input to the input unit 30 is 26 cm will be described.
  • Step S1 (Judgment of necessity of changing shooting conditions)
  • the controller 70 compares the input body thickness with the standard body thickness.
  • the standard body thickness is desirably set in advance. Here, the case where the standard body thickness is stored as 15 to 25 cm will be described. If the input body thickness is within the range of the standard body thickness, the processing by the control unit is terminated and imaging is started. At this time, you may display on a display part so that a user may understand that it is not necessary to change imaging
  • Step S2 (calculation of changeable parameters and estimated values)
  • the control unit 70 refers to the type of imaging, the body thickness of the subject, and the storage table 41 to calculate the type of parameter to be changed. Further, the control unit 70 refers to the storage table 41 and calculates an estimated value.
  • FIG. 5 shows estimated values associated with parameter types and body thicknesses stored in the storage table 41.
  • the storage table 41 stores parameters that can be changed according to the type of shooting.
  • the storage table 41 stores estimated values according to the type and body thickness of the parameter to be changed. All the options with the same body thickness are stored so that the X-ray doses that pass through the subject and enter the detector are substantially the same.
  • the control unit 70 indicates from the storage table 41 that the types of parameters that can be changed are tube current and SID. read out.
  • the tube current when changing the SID, or when changing both the tube current and the SID, respective estimated values are read from the storage table 41.
  • the read information about the changeable parameter type and estimated value is output to the display unit 50.
  • the exposure time is set as short as possible in order to shorten the time required for the entire imaging as much as possible and to suppress blurring of the X-ray image due to the movement of the subject.
  • Step S3 (display shooting conditions)
  • the display unit 50 displays the parameters to be changed (tube current 52a, SID 52b, tube current and SID 52c) so that the user can recognize them.
  • FIG. 3 shows how the parameter types to be changed are displayed on the display unit 50 as options 51a, 51b, and 51c, respectively.
  • estimated values 53a, 53b, and 53c are displayed for each parameter type.
  • Step S4 selection of shooting conditions by the user
  • the user uses the selection unit 60 to select an optimum parameter to be changed from the plurality of options 51a, 51b, 51c.
  • the option 51a for increasing the tube current will be described.
  • the imaging condition in which the tube current is changed to 250 mA in this embodiment is an example of the second imaging condition in the present invention.
  • Step S5 obtaining information selected by the user
  • the control unit 70 acquires information on the parameter to be changed from the options selected by the user. In this case, since the user has selected the option 51a, the control unit 70 acquires information “change the tube current to 250 mA”.
  • Step S6 change of shooting conditions
  • the control unit 70 appropriately outputs control signals to the X-ray tube control unit 11 and the apparatus drive control unit 12 based on the information obtained in step S5.
  • a control signal is output to the X-ray tube controller 11 and the tube current is changed from 125 mA to 250 mA.
  • the control unit 70 outputs a control signal to the device drive control unit 12 based on the information obtained in step S5.
  • the apparatus drive control unit 12 may be configured to automatically change the position of the X-ray tube 10 in the Z-axis direction. Moreover, it is good also as a structure which changes the position of the Z-axis direction of the X-ray tube 10 by a user pressing down the operation switch which is not shown in figure. In this case, the user selects an option in step S4 and then presses the operation switch.
  • step S8 the user may manually change the position of the X-ray tube 10 in the Z-axis direction after confirming the estimated value.
  • Step S7 A display is made on the display unit 50 so that the user can know that all the processes have been completed. By performing the display, all the processes related to the examination operation of the imaging conditions of the X-ray imaging apparatus 1 are completed.
  • Embodiment 2 of the present invention will be described with reference to FIG.
  • movement process of the X-ray imaging apparatus which concerns on Example 2 is the same as that of the X-ray imaging apparatus which concerns on Example 1 shown in FIG. 2 and FIG. Therefore, the same reference numerals are given to the respective components and operation steps, and detailed description thereof is omitted, and a characteristic method for obtaining the body thickness of the subject M in the second embodiment will be described.
  • the body thickness calculation unit 32 is based on the information on the distance H1 from the X-ray tube 10 to the body surface of the subject M that is sequentially transmitted from the distance calculation unit 27.
  • the body thickness is calculated. Specifically, the body thickness is calculated by obtaining the distance H2 between the top plate and the X-ray tube 10 from the apparatus drive control unit 12 and calculating H2-H1.
  • the subject M is placed on the top board in step S0, and the body thickness is automatically measured and calculated by the distance calculation unit 31 and the body thickness calculation unit 32.
  • the calculated body thickness is output to the control unit 70, and the step S0 is completed.
  • the body thickness is automatically measured and calculated by the distance calculation unit 31 and the body thickness calculation unit 32.
  • the body thickness of the subject M can be acquired more accurately.
  • the user's work burden related to body thickness acquisition is reduced. Since the posture at the time of measuring the body thickness of the subject M and the posture at the time of X-ray image photographing are the same, it is possible to shift to photographing more smoothly.
  • the user is configured to measure the body thickness of the subject M using a tape measure or the like, but is not limited thereto.
  • the body thickness is obtained from the height and weight (for example, Non-Patent Document 1)
  • the user may be configured to input the height and weight of the subject M.
  • Non-Patent Document 1 “Method for Determining Body Thickness from Weight and Height”, Journal of Japanese Society of Radiological Technology, 65th No. 1, pages 50-56
  • the signal is output from the distance calculation unit 27 to the body thickness calculation unit 32, but is not limited thereto.
  • a signal may be output from the image processing unit 33 to the body thickness calculation unit 32. That is, test imaging is performed on the subject M, and the body thickness is calculated from the X-ray imaging image obtained by the test imaging.
  • the detection signal output from the detector 20 is configured to be input to the image processing unit 33, and the image processing unit 33 forms an X-ray image based on the input signal.
  • the X-ray image is input to the body thickness calculation unit 32, and the body thickness calculation unit 32 estimates the body thickness of the subject M from the X-ray image.
  • a configuration is adopted in which photographing using a phantom is performed in advance, and a storage table of pixel values for the phantom thickness (body thickness) is provided.
  • the body thickness is estimated from the average pixel value of the X-ray image obtained by the test image and the storage table.
  • the test imaging is performed and the body thickness is estimated from the X-ray image.
  • the present invention is not limited to this. That is, a test fluoroscopy may be performed to estimate the body thickness from the current value.
  • the parameters to be changed are only the tube current and SID, or both, but are not limited thereto.
  • the parameter type and value are changed. It can be set appropriately.
  • parameter types include the type of metal filter 21 to be used, the X-ray exposure time, the X-ray voltage, and the like.

Abstract

Le problème décrit par la présente invention concerne un appareil d'imagerie à rayons X qui permet à un utilisateur de prendre en compte la modification d'un paramètre qui n'est généralement pas pris en considération lors de la modification de conditions d'exposition et un appareil d'imagerie à rayons X qui peut effectuer une imagerie dans des conditions plus optimales par la prise en compte des spécifications ou similaires de l'appareil. La solution selon l'invention porte sur un appareil d'imagerie à rayons X qui affiche une pluralité d'options pour des classes de paramètres qui devraient être modifiées sur la base des informations d'épaisseur de corps d'un sujet en cours d'examen et qui commande, lors de la sélection de l'une des options affichées par l'utilisateur, au moins une unité d'irradiation de rayons X dans les conditions d'exposition déterminées sur la base du signal de sortie provenant d'une unité de sélection.
PCT/JP2018/016240 2018-04-20 2018-04-20 Appareil de radiographie numérique WO2019202722A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201880092579.5A CN111989043B (zh) 2018-04-20 2018-04-20 数字放射线摄像装置
PCT/JP2018/016240 WO2019202722A1 (fr) 2018-04-20 2018-04-20 Appareil de radiographie numérique
JP2020514880A JP7147842B2 (ja) 2018-04-20 2018-04-20 デジタルラジオグラフィー装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/016240 WO2019202722A1 (fr) 2018-04-20 2018-04-20 Appareil de radiographie numérique

Publications (1)

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WO2019202722A1 true WO2019202722A1 (fr) 2019-10-24

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JP (1) JP7147842B2 (fr)
CN (1) CN111989043B (fr)
WO (1) WO2019202722A1 (fr)

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2001008930A (ja) * 1999-07-02 2001-01-16 Shimadzu Corp Ｘ線ｃｔ装置
JP2010172362A (ja) * 2009-01-27 2010-08-12 Fujifilm Corp 放射線画像処理方法および装置、並びに放射線画像処理プログラム
JP2013048746A (ja) * 2011-08-31 2013-03-14 Fujifilm Corp 撮影条件決定支援装置及び撮影条件決定支援方法
US20160374637A1 (en) * 2015-06-23 2016-12-29 Samsung Electronics Co., Ltd. X-ray apparatus and controlling method of the same

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JP3554129B2 (ja) * 1997-01-17 2004-08-18 キヤノン株式会社 放射線撮影装置
JP4601446B2 (ja) * 2005-02-14 2010-12-22 株式会社日立メディコ Ｘ線撮影装置
JP4648783B2 (ja) * 2005-07-14 2011-03-09 株式会社日立メディコ Ｘ線画像撮影装置
JP2011067333A (ja) * 2009-09-25 2011-04-07 Fujifilm Corp 放射線画像撮影装置及び撮影制御装置
CN107708564B (zh) * 2015-07-07 2021-11-05 富士胶片株式会社 放射线图像摄影装置、放射线图像摄影装置的控制方法以及记录介质
TWI621870B (zh) * 2016-09-21 2018-04-21 高雄醫學大學 Ｘ光機輻射劑量攝影參數估測系統及其估測方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001008930A (ja) * 1999-07-02 2001-01-16 Shimadzu Corp Ｘ線ｃｔ装置
JP2010172362A (ja) * 2009-01-27 2010-08-12 Fujifilm Corp 放射線画像処理方法および装置、並びに放射線画像処理プログラム
JP2013048746A (ja) * 2011-08-31 2013-03-14 Fujifilm Corp 撮影条件決定支援装置及び撮影条件決定支援方法
US20160374637A1 (en) * 2015-06-23 2016-12-29 Samsung Electronics Co., Ltd. X-ray apparatus and controlling method of the same

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CN111989043B (zh) 2024-03-26
JP7147842B2 (ja) 2022-10-05
CN111989043A (zh) 2020-11-24
JPWO2019202722A1 (ja) 2021-04-22

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