JP6110342B2 - Radiation dose management apparatus, radiation dose management method, and radiation dose management program - Google Patents

Description

  The present invention relates to a radiation dose management apparatus, a radiation dose management method, and a radiation dose management program, and in particular, a radiation dose management apparatus, a radiation dose management method, and a radiation dose management method for managing a radiation dose of an X-ray imaging apparatus in which a target dose index is set. It relates to radiation dose management program.

  According to the DICOM (Digital Imaging and Communication in Medicine) standard, conventionally, two tags of (0018, 1405) Relative X-Ray Exposure and (0018, 6000) Sensitivity have been called “Exposure Index”, and this is an imaging dose. It has been used as an indicator.

  However, with regard to the conventional “Exposure Index” using these two tags, only the “tag number” was defined, and it was left up to the modality manufacturer to actually use the “index”, so each modality manufacturer , S-value, REX value, IgM value and other unique indexes are stored in two tags and used as dose management indexes. As a result, various indicators were mixed up in the clinical site, and the site was confused.

Therefore, standardization activities began in IEC (International Electrotechnical Commission) in 2006, and (0018, 1411) Exposure Index (hereinafter referred to as “EI”) and (0018, 1412) Target Exposure Index (2008, Correction Package 1024). In the following, three tags of “EI _T ” and (0018, 1413) Deviation Index (hereinafter referred to as “DI”) are newly defined.

  In 2011, it was officially defined in the DICOM standard part 6: Data Dictionary, and it was decided that in the future it would be possible to manage imaging doses using DI values rather than S and REX values.

For reference, EI is a physical index calculated according to Equation 1, and EI _T is a value of EI that should be aimed for each imaging region. With the introduction of EI _T, it is possible to use the EI as the shooting dose index. DI is calculated according to Equation 2 based on the EI and EI _T.
[Equation 1]
EI = 100 × g (Vcal)
g (Vcal): Inverse calibration function measured at the time of device calibration [Expression 2]
DI = 10 × log (EI / EI _T )

Kunitomo Hiroshi, “1. Concept and application of new index“ exposure index: EI ”for dose evaluation between devices”, Monthly Inner Vision October 2012 issue, p. 14-p. 18 Yuichiro Yamamoto, “2. What can be done to optimize image quality and dose from the IT standpoint-focusing on the possibility of management using EI”, Monthly Inner Vision October 2012 issue, p. 19-p. 21

However, EI, will also EI _T and DI, but the meaning of the "tag number" and "index" has been defined, the "operation method" has not yet been defined. To be more specific, or a unique calculation method is the modality manufacturer of EI value, or an undecided is a method of determining the _{EI T, RIS (Radiology Information System} ) problems such or not items such as inspection purposes to the master of There is. For this reason, it is also difficult to manage the radiation dose of the X-ray imaging apparatus using the new Exposure Index.

  Therefore, a main object of the present invention is to provide a radiation dose management apparatus, a radiation dose management method, and a radiation dose management program that can more easily manage the radiation dose of an X-ray imaging apparatus.

The radiation dose management apparatus according to the present invention (10: reference numeral corresponding to the embodiment, the same applies hereinafter) is used for the radiation transmitted through the patient at the time of imaging by the X-ray imaging apparatus (40) in which the target dose index (EI _T ) is set. A first acquisition means (S15, S35) for acquiring a plurality of dose indices (EI) each representing a dose, and a deviation index indicating a deviation of each of the plurality of dose indices acquired by the first acquisition means from the target dose index ( The second acquisition means (S19, S35) for acquiring (DI), and a first graph representing the relationship between each of the plurality of dose indices acquired by the first acquisition means and the deviation index acquired by the second acquisition means is displayed. First display means (S39, S41), a second graph showing the frequency distribution of the plurality of dose indexes acquired by the first acquisition means is displayed in parallel with the first graph displayed by the first display means 2 display means (S37, S41), and the index to update the target dose indicator Comprising a first receiving means for receiving associated new operation process of the first display means (S49).

  Preferably, a first update means (S53, S55) for updating the deviation index acquired by the second acquisition means in response to the index update operation is further provided, and the first display means is updated by the first update means. Graph updating means (S39) for updating the first graph with reference to the deviation index is included.

  Preferably, the index update operation corresponds to an operation for designating a desired dose index value on the first graph displayed by the first display means.

  Preferably, a second receiving means (S71) for receiving a confirmation operation for confirming the target dose index, and a second updating means (S77) for updating the setting of the X-ray imaging apparatus in response to the confirmation operation are further provided.

  Preferably, a third receiving means (S57) for receiving a coordinate selection operation for selecting any one of a plurality of coordinates on the first graph displayed by the first display means, and a plurality of pieces of information acquired by the first acquiring means. Third display means for displaying, in parallel with the first graph displayed by the first display means, an X-ray image related to the coordinate selected by the coordinate selection operation among the plurality of X-ray images respectively corresponding to the dose index ( S59, S61) and highlighting means (S63) for highlighting the coordinates selected by the coordinate selection operation.

  Preferably, classification means (S13) for classifying an X-ray image created by the X-ray imaging apparatus into one of a plurality of groups according to a predetermined rule, and group selection for selecting any one of the plurality of groups Fourth receiving means (S33) for receiving the operation in relation to the processing of the first acquiring means is further provided, the target dose index indicates a plurality of values respectively corresponding to a plurality of groups, and the first acquiring means performs a group selection operation. The dose index belonging to the group selected by is acquired.

The radiation dose management method according to the present invention is a radiation dose management method executed by the radiation dose management device (10) for managing the radiation dose of the X-ray imaging apparatus (40) in which the target dose index (EI _T ) is set. A first acquisition step (S15, S35) for acquiring a plurality of dose indices (EI) each representing a dose of radiation transmitted through the patient at the time of imaging by the X-ray imaging apparatus, and a plurality of acquired by the first acquisition step A second acquisition step (S19, S35) for acquiring a deviation index (DI) representing a deviation of each dose index from each target dose index, and a plurality of dose indexes acquired in the first acquisition step and a second acquisition step A first display step (S39, S41) for displaying a first graph representing the relationship with the acquired deviation index, and a second graph indicating the frequency distribution of a plurality of dose indices acquired by the first acquisition step are first displayed. Table by step Comprising a reception step (S49) for accepting a second display step of displaying in parallel with the first graph is (S37, S41), and an index update operations for updating a target dose indicator in connection with the processing of the first display step .

The radiation dose management program according to the present invention provides an X-ray imaging to the processor (14) of the radiation dose management device (10) that manages the radiation dose of the X-ray imaging device (40) for which the target dose index (EI _T ) is set. A first acquisition step (S15, S35) for acquiring a plurality of dose indexes (EI) each representing a dose of radiation transmitted through the patient at the time of imaging by the apparatus, and each of the plurality of dose indexes acquired by the first acquisition step A second acquisition step (S19, S35) for acquiring a deviation index (DI) representing a deviation from the target dose index, each of a plurality of dose indexes acquired in the first acquisition step, and a deviation index acquired in the second acquisition step The first display step (S39, S41) for displaying the first graph representing the relationship between the first and second graphs, and the second graph indicating the frequency distribution of the plurality of dose indexes acquired by the first acquisition step are displayed by the first display step. With the first graph A second display step of displaying by column (S37, S41), and for the index update operation for updating the target dose indicator to execute a reception step of receiving in connection with the processing of the first display step (S49), the radiation dose It is a management program.

According to the present invention, the dose index represents the dose of radiation that has passed through the patient during imaging by the X-ray imaging apparatus in which the target dose index is set, and the deviation index represents the deviation of such a dose index from the target dose index. The first graph shows the relationship between the dose index and the deviation index, and an index update operation for updating the target dose index is accepted in connection with the display of the first graph. The operator can update the target dose index based on the relationship between the dose index and the deviation index. As a result, the operability when setting the target dose index to an appropriate value is improved, and the radiation dose of the X-ray imaging apparatus can be easily managed.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is a block diagram which shows an example of a structure of the X-ray image management system applied to this Example. It is an illustration figure which shows the relationship between the maximum variable range of the radiation dose irradiated to a test subject, and the range of the radiation dose which can be adjusted by an X-ray engineer. It is an illustration figure which shows an example of the structure of a DICOM file. It is an illustration figure which shows an example of a structure of the register | resistor provided in the main memory of the radiation dose management apparatus. It is an illustration figure which shows an example of a structure of the database provided in the main memory unit of the radiation dose management apparatus. It is a flowchart which shows a part of operation | movement of CPU provided in the radiation dose management apparatus. It is a flowchart which shows a part of other operation | movement of CPU provided in the radiation dose management apparatus. It is an illustration figure which shows an example of the image displayed on the screen of the display apparatus provided in the radiation dose management apparatus. It is an illustration figure which shows an example of the change of EI / DI graph before and behind dot selection / change operation. It is a flowchart which shows a part of other operation | movement of CPU provided in the radiation dose management apparatus. It is a flowchart which shows further another part of operation | movement of CPU provided in the radiation dose management apparatus. It is a flowchart which shows a part of other operation | movement of CPU provided in the radiation dose management apparatus.

  Referring to FIG. 1, the X-ray image management system according to this embodiment includes a radiation dose management device 10, a RIS 30, and an X-ray imaging device (modality) 40 connected to each other via a communication network 50. In the radiation dose management apparatus 10, a communication I / F 12, a CPU 14, a keyboard 16, a mouse pointer 18, a display device 20, a DRAM 22, and a main storage device 24 are connected to the bus BS1. The main storage device 24 is provided with a register RGST and a database DB.

In this embodiment, X-ray images of patients (subjects) are grouped as shown in Table 1 according to age, sex, and imaging region.

  That is, if the patient is an adult male and the imaging region is the front of the chest, the X-ray image of this patient is classified into group 1. If the patient is an adult male and the imaging region is other than the front of the chest, the X-ray image of this patient is classified into group 2. If the patient is an adult female and the imaging site is the front of the chest, the X-ray image of this patient is classified into group 3. If the patient is an adult female and the imaging region is other than the front of the chest, the X-ray image of this patient is classified into group 4.

  If the patient is a minor male and the imaging region is the front of the chest, the X-ray image of this patient is classified into group 5. If the patient is a minor male and the imaging region is other than the front of the chest, the X-ray image of this patient is classified into group 6. If the patient is a minor woman and the imaging site is the front of the chest, the X-ray image of this patient is classified into group 7. If the patient is a minor woman and the imaging site is other than the front of the chest, the X-ray image of this patient is classified into group 8.

The X-ray imaging device 40, eight EI _T values corresponding to the 8 group is set in advance. When the X-ray technician inputs patient information (patient name, age, sex) and imaging condition information (imaging site) to the RIS 30, the input patient information and imaging condition information are transmitted to the X-ray imaging apparatus 40 via the communication network 50. Transferred.

X-ray imaging device 40 identifies the EI _T values of a group conforming to the transferred patient information and the photographing condition information, the reference dose values Reit a reference value of the radiation dose irradiated to the patient for X-ray imaging Calculation is based on this EI _T value. Calculation when the calculation equation is used with different coefficients for each group, the reference dose value Reit is uniquely calculated from EI _T value. The X-ray technician manually adjusts the radiation dose irradiated to the patient within a range of ± α centered on the reference dose value Reit thus calculated. When the radiation dose is determined by manual adjustment, X-ray imaging according to the determined radiation dose is executed by the X-ray imaging apparatus 40.

  The maximum variable range of the radiation dose irradiated to the patient depends on the performance of the X-ray imaging apparatus 40, and the upper limit value and the lower limit value thereof indicate “Rmax” and “Rmin”, respectively (see FIG. 2). On the other hand, the range “Reit ± α” that can be manually adjusted by the X-ray technician is much narrower than the maximum variable range. Thereby, it is possible to avoid a situation where an excessive dose of radiation is irradiated to the patient due to an erroneous operation of the X-ray technician.

  An X-ray image of a patient obtained by X-ray imaging is stored in a DICOM file as shown in FIG. 3 together with patient information, imaging condition information, and EI value. Here, the EI value is calculated based on the output of a detector that detects the dose of radiation that has passed through the patient. Patient information, imaging condition information, and EI value are stored in a DICOM file as part of the tag. Further, each DICOM file is given an identification number that is consecutive in the order of creation. The DICOM file created in this way is stored in a main storage device (not shown) provided in the X-ray imaging apparatus 40.

  The CPU 14 provided in the radiation dose management apparatus 10 acquires the DICOM file stored in the X-ray imaging apparatus 40 and completes the register RGST and the database DB provided in the main storage device 24 with reference to FIGS. The registration process according to the flowchart shown in FIG. A program corresponding to this flowchart and flowcharts shown in FIGS. 10 to 12 (described later) is stored in the main storage device 24 as a radiation dose management program.

First, in step S1, to obtain eight EI _T value set in the X-ray imaging apparatus 40. Specifically, it issued X-ray imaging apparatus 40 EI _T transfer request via the communication I / F12, obtaining eight EI _T value transferred from the X-ray imaging apparatus 40 in response through the communication I / F12 to To do. The acquired EI _T value is registered in the register RGST shown in FIG.

According to FIG. 4, the register RGST has 8 columns each corresponding to the 8 groups described above. Eight EI _T values obtained from the X-ray imaging apparatus 40, each of which is described in this eight columns.

  In the subsequent step S3, the variable N is set to the reference value REF. The reference value REF is a value obtained by adding “1” to the identification number of the DICOM file acquired last by the previous registration process (however, the initial value is “1”). When the setting of the variable N is completed, the process proceeds to step S5, and the Nth DICOM file is acquired from the X-ray imaging apparatus 40. Specifically, a file transfer request in which the value of the variable N is embedded is issued to the X-ray imaging apparatus 40 through the communication I / F 12, and the DICOM file transferred from the X-ray imaging apparatus 40 in response to this is transmitted to the communication I / F. Obtained through / F12. The acquired DICOM file is expanded in the DRAM 22.

  In step S7, an X-ray image is extracted from the DICOM file on the DRAM 22, and the extracted X-ray image is registered in the database DB. The database DB is configured as shown in FIG. 5, and the X-ray image is stored in the Nth column. In steps S9 and S11, patient information and imaging condition information are extracted from the DICOM file tag on the DRAM 22, respectively. The extracted patient information and imaging condition information are also described in the Nth column of the database DB.

  In step S13, the group to which the patient belongs is identified with reference to the age and sex forming the patient information and the imaging site forming the imaging condition information, and the identification number indicating the identified group, that is, the group number is displayed in the Nth column of the database DB. Describe in. For example, if the patient is a 28-year-old woman and the imaging region is the front of the chest, the group number “3” is written in the Nth column.

In step S15, the EI value is extracted from the tag of the DICOM file on the DRAM 22, and the extracted EI value is registered in the Nth column of the database DB. In step S17, it detects the EI _T value of the specified group in step S13 from the register RGST.

In step S19, the DI value is calculated by applying the EI value extracted in step S15 and the EI _T value detected in step S17 to Equation 3. Expression 3 is the same mathematical expression as Expression 2 described above, and the DI value is a logarithmic expression of the deviation of the EI value from the EI _T value. The calculated DI value is registered in the Nth column of the database DB.
[Equation 3]
DI = 10 × log (EI / EI _T )

  In step S21, it is determined whether or not the variable N has reached the maximum value Nend (Nend: identification number of the latest DICOM file stored in the X-ray imaging apparatus 40). If the determination result is NO, the variable N is incremented in step S23 and then the process returns to step S3. If the determination result is YES, "N + 1" is set to the reference value REF in step S25 and the registration process is terminated.

CPU14 provided dose management unit 10 also, in order to update the EI _T value set to the X-ray imaging device 40 for each group according to the operation of the radiologist, set according to a flowchart shown in FIGS. 10 to 12 Execute the change process.

  First, in step S31, the group menu is displayed on the screen SCR of the display device 20. Specifically, a graphic image representing the group menu is created on the DRAM 22 and the display device 20 is requested to display the created graphic image. The display device 20 reads a graphic image from the DRAM 22 according to the request, and displays the read graphic image on the screen SCR. On the group menu displayed in this way, in addition to the group number, adult / minor distinction, gender, and imaging region are listed.

  In step S33, it is repeatedly determined whether or not a desired group has been selected by the keyboard 16 or the mouse pointer 18 (whether or not a group selection operation has been performed). When the determination result is updated from NO to YES, the process proceeds to step S35, and a plurality of EI values and a plurality of DI values belonging to the group selected by the group selection operation, that is, the target group are acquired from the database DB. In step S37, an EI frequency distribution graph is created based on the plurality of obtained EI values, and in step S39, an EI / DI graph is created based on the obtained plurality of EI values and a plurality of DI values. Both the EI frequency distribution graph and the EI / DI graph are represented by graphic images and created on the DRAM 22.

  In step S41, the display device 20 is requested to display the EI frequency distribution graph and the EI / DI graph thus created. The display device 20 reads the EI frequency distribution graph and the EI / DI graph from the DRAM 22 according to the request, and displays the read EI frequency distribution graph and EI / DI graph on the screen SCR in the manner shown in FIG.

  According to FIG. 8, the EI frequency distribution graph is displayed at the lower left of the screen SCR, and the EI / DI graph is displayed at the upper left of the screen SCR. Both the EI frequency distribution graph and the EI / DI graph have the EI value on the horizontal axis, and the arrangement of numerical values on the horizontal axis is consistent between the EI frequency distribution graph and the EI / DI graph. However, the number of DICOM files having a common EI value is assigned to the vertical axis of the EI frequency distribution graph, and the DI value is assigned to the vertical axis of the EI / DI graph. Further, the frequency distribution is drawn by a curve on the EI frequency distribution graph, and dots are displayed at coordinates indicating the EI value and the DI value related to each other on the EI / DI graph.

By referring to the EI frequency distribution graph, it can be determined how much the dose of radiation transmitted through the patient during X-ray imaging varies between DICOM files belonging to the target group. Further, by referring to the EI / DI graph, the dose of radiation transmitted through the patient at the time of X-ray photography or is found for each DICOM files belonging to the target group are offset degree from dose corresponding to EI _T value.

At step S43, it acquires the EI _T value of the target group from the register RGST. The acquired EI _T value is written in the DRAM 22. In a succeeding step S45, a slider SLD pointing the acquired EI _T value is displayed on the screen SCR of the display device 20. Specifically, a graphic image representing the slider SLD is drawn on the DRAM 22 and the display device 20 is requested to display this graphic image. The display device 20 reads a graphic image from the DRAM 22 in accordance with the request, and displays the read graphic image on the screen SCR in the manner shown in FIG.

According to FIG. 8, the slider SLD is displayed in such a manner that it can slide in the horizontal direction at a position between the EI frequency distribution graph and the EI / DI graph. Further, the position of the slider SLD in the horizontal direction is matched with the EI _T value acquired in step S43.

In step S47, the auxiliary line L1 extending in the vertical direction at the position of the acquired EI _T value and the auxiliary line L2 extending in the vertical direction at the position of the recommended EI _T value (= EI value corresponding to the vertex of the EI frequency distribution graph) are displayed. And displayed on the screen SCR of the display device 20. Specifically, graphic images representing the auxiliary lines L1 and L2 are drawn on the DRAM 22 and the display device 20 is requested to display the graphic images. The display device 20 reads a graphic image from the DRAM 22 in accordance with the request, and displays the read graphic image on the screen SCR in the manner shown in FIG.

  In step S49, it is determined whether or not an operation for moving the slider SLD with the mouse pointer 18 has been performed (whether or not a slider movement operation has been performed). In step S57, it is determined whether or not a desired dot on the EI / DI graph is designated by the mouse pointer 18 (whether or not a dot selection / change operation has been performed).

Question of the step S49 proceeds to step S51 if YES, the the EI _T value of the target group that are described in the register RGST updated by EI _T values specified by the slider movement operation. In step S53, the column of the target group is detected from the database DB. In step S55, the DI value is calculated again by applying the EI value described in the detected column and the EI _T value updated in step S51 to Equation 3 described above. The calculated DI value is described in the reference source column. As a result, the DI value described in the target group column is updated. When the process of step S55 is completed, the process returns to step S35.

In step S39 executed after step S35, an EI / DI graph is created with reference to the updated DI value, and the created EI / DI graph is displayed on the screen SCR by the process of step S41. As a result, the dot position on the EI / DI graph moves. Further, followed by processing in steps S43 and S45 are executed, the position of the slider SLD is fit EI _T value after update.

  If the determination result of step S57 is YES, it will progress to step S59 and will acquire the X-ray image corresponding to the dot designated by dot selection / change operation, ie, an object dot, from database DB. The acquired X-ray image is developed in the DRAM 22. In step S61, the display device 20 is requested to display the developed X-ray image. The display device 20 reads an X-ray image from the DRAM 22 in accordance with the request, and displays the read X-ray image at the lower right of the screen SCR in the manner shown in FIG.

  In step S63, the target dot is highlighted and displayed. Specifically, the color and / or brightness of the target dot on the EI / DI graph developed in the DRAM 22 is changed, and if necessary, the highlighting of another dot is terminated, and the changed EI / DI is thus changed. The display device 20 is requested to display the graph. As a result, the target dot on the EI / DI graph displayed on the screen SCR is emphasized. When the process of step S63 is completed, the process returns to step S49.

  When the process in step S59 is the second and subsequent processes, the X-ray image developed in the DRAM 22 by the process in the previous step S59 is overwritten by the X-ray image acquired in the process in step S59. . As a result, the X-ray image on the screen SCR is also updated with the X-ray image acquired by the current processing in step S59. Further, the highlighted dot is also changed to the dot designated by the current dot selection / change operation. Before and after the dot change operation, the highlighting changes as shown in FIG. 9, for example.

If both NO determination result of the determination result and the step S57 in step S49, the operation of EI _T value of the target group is determined not to have been updated in step S65, and ends the setting change is performed by the keyboard 16 Whether or not (end operation has been performed) is determined in step S67. If the determination result of step S67 is YES, it will return to step S31 as it is.

If the determination in step S65 is YES, suspend operation to update the EI _T value, it is determined whether or not made by the keyboard 16 (whether interruption operation is performed) at step S69, the updated EI _In step S71, it is determined whether or not an operation for determining the _T value has been performed with the keyboard 16 (whether or not a determination operation has been performed).

The question of the step S69 proceeds to step S73 if YES, the undo EI _T value of the target group that are described in the register RGST. In step S75, the DI value of the target group described in the database DB is restored. When the process of step S75 is completed, the process returns to step S31.

The question of the step S71 proceeds to step S77 if YES, the set the EI _T value updated in step S51 in the X-ray imaging apparatus 40. Specifically, an EI _T update request in which the group number of the target group and the EI _T value are embedded is issued to the X-ray imaging apparatus 40 through the communication I / F 12. X-ray imaging apparatus 40 updates the EI _T value of the target group in accordance with EI _T update request. When the process of step S77 is completed, the process returns to step S31.

As understood from the above description, the X-ray imaging apparatus 40, EI _T value is set. The CPU 14 acquires a plurality of EI values each representing a dose of radiation transmitted through the patient at the time of imaging by the X-ray imaging apparatus (S15, S35), and a plurality of each representing a deviation of the acquired EI value from the EI _T value. The DI value is calculated (S19, S35). The CPU 14 also displays an EI / DI graph representing the relationship between the plurality of EI values thus obtained or calculated and the plurality of DI values on the screen SCR of the display device 20 (S39, S41), and a slider for updating the EI _T value. The moving operation is accepted in relation to the display of the EI / DI graph (S49).

The EI value represents the dose of radiation that has passed through the patient during imaging by the X-ray imaging apparatus 40, and the DI value represents the deviation of such EI value from the EI _T value. The EI / DI graph shows the relationship between the EI value and DI values, slider movement operations that update EI _T values are accepted in relation to the display of the EI / DI graph. The operator can update the EI _T value based on the relationship between the EI value and the DI value. This improves the operability when setting the EI _T value to a proper value, it is easy to turn control of radiation of X-ray imaging apparatus 40.

  In this embodiment, patient X-ray images are grouped according to age, sex, and radiographic region. However, the patient's X-ray images may be further divided into groups in consideration of the model of the X-ray imaging apparatus, the examination purpose, the imaging position, the height, the weight, and the like.

In this embodiment, the database DB is provided in the main storage device 24 of the radiation management apparatus 10, but the database DB may be provided in a DICOM file server different from the radiation management apparatus 10. Further, in this embodiment, a plurality of dots are drawn on the EI / DI graph, but a characteristic curve having a color that gradually changes according to the density of the dots may be drawn. Further, in this embodiment, a range of ± alpha around the reference dose Reit calculated based on the EI _T value, X-rays technician has to be able to manually adjust the radiation dose. However, manual adjustment of the radiation dose by the X-ray technician may be prohibited.

10 ... Radiation dose management device 14 ... CPU
20 ... Display device 24 ... Main storage device 30 ... RIS
40 ... X-ray imaging apparatus

Claims (8)

First acquisition means for acquiring a plurality of dose indexes each representing a dose of radiation transmitted through the patient at the time of imaging by the X-ray imaging apparatus in which the target dose index is set;
Second acquisition means for acquiring a deviation index representing a deviation of each of the plurality of dose indexes acquired by the first acquisition means with respect to the target dose index;
First display means for displaying a first graph representing a relationship between each of the plurality of dose indices acquired by the first acquisition means and the deviation index acquired by the second acquisition means;
Second display means for displaying a second graph indicating the frequency distribution of a plurality of dose indices acquired by the first acquisition means in parallel with the first graph displayed by the first display means; and the target dose index A radiation dose management apparatus, comprising: a first receiving unit that receives an index update operation for updating the data in association with the processing of the first display unit. A first update means for updating the deviation index acquired by the second acquisition means in response to the index update operation;
The radiation dose management apparatus according to claim 1, wherein the first display unit includes a graph update unit that updates the first graph with reference to a deviation index updated by the first update unit.   The radiation dose management apparatus according to claim 1, wherein the index update operation corresponds to an operation of designating a desired dose index value on the first graph displayed by the first display unit. 4. The apparatus according to claim 1, further comprising: a second accepting unit that accepts a confirming operation for confirming the target dose index; and a second updating unit that updates a setting of the X-ray imaging apparatus in response to the confirming operation. Radiation dose management device described in 1. Third receiving means for receiving a coordinate selection operation for selecting any one of a plurality of coordinates on the first graph displayed by the first display means;
The X-ray image related to the coordinates selected by the coordinate selection operation among the plurality of X-ray images respectively corresponding to the plurality of dose indexes acquired by the first acquisition means is displayed by the first display means. third display means for displaying in parallel with the first graph, and further comprising highlighting means for highlighting the selected coordinates by the coordinate selection operation, radiation dose management apparatus according to any one of claims 1 to 4. Classifying means for classifying an X-ray image created by the X-ray imaging apparatus into one of a plurality of groups according to a predetermined rule, and a group selection operation for selecting any one of the plurality of groups Further comprising a fourth accepting means for accepting in relation to the processing of the one obtaining means,
The target dose index indicates a plurality of values respectively corresponding to the plurality of groups;
Said first acquisition means acquires the dose indicator belonging to the group selected by said group selection operation, radiation dose management apparatus according to any one of claims 1 to 5. A radiation dose management method executed by a radiation dose management apparatus that manages a radiation dose of an X-ray imaging apparatus in which a target dose index is set,
A first acquisition step of acquiring a plurality of dose indexes each representing a dose of radiation transmitted through a patient during imaging by the X-ray imaging apparatus;
A second acquisition step of acquiring a deviation index representing a deviation of each of the plurality of dose indexes acquired in the first acquisition step with respect to the target dose index;
A first display step of displaying a first graph representing a relationship between each of the plurality of dose indexes acquired in the first acquisition step and the deviation index acquired in the second acquisition step;
A second display step of displaying a second graph indicating the frequency distribution of the plurality of dose indexes acquired in the first acquisition step in parallel with the first graph displayed in the first display step; and the target dose index A radiation dose management method comprising: an accepting step of accepting an index update operation for updating the image in association with the processing of the first display step. In the processor of the radiation dose management apparatus that manages the radiation dose of the X-ray imaging apparatus in which the target dose index is set,
A first acquisition step of acquiring a plurality of dose indexes each representing a dose of radiation transmitted through a patient during imaging by the X-ray imaging apparatus;
A second acquisition step of acquiring a deviation index representing a deviation of each of the plurality of dose indexes acquired in the first acquisition step with respect to the target dose index;
A first display step of displaying a first graph representing a relationship between each of the plurality of dose indexes acquired in the first acquisition step and the deviation index acquired in the second acquisition step;
A second display step of displaying a second graph indicating the frequency distribution of the plurality of dose indexes acquired in the first acquisition step in parallel with the first graph displayed in the first display step; and the target dose index A radiation dose management program for executing an accepting step of accepting an index updating operation for updating the image in association with the processing of the first display step.

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