JP2009213905A - Radiation exposure dose control system and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems wherein a subject has no means for controlling exposure dose by each examination in radiation examination, and data of a radiation examination device is incompatible, so that the exposure dose of one subject exposed to radiation during a fixed period cannot be controlled synthetically, and the subject is often exposed to vast radiation. <P>SOLUTION: In the radiation exposure dose control system, a radiation examination device, an image management server storing an image photographed by the radiation examination device and an image information group of the photographing information on the image, an exposure dose control device for extracting information required for calculating an exposure dose from the image information kept in the image management server to calculate an exposure dose, and managing data of the exposure dose of the subject, and a nosocomial information database server are connected to each other through a network, the data of an exposure dose calculated by the exposure dose control device is recorded and kept in an individual information database of the subject of the nosocomial information database server, and the data of exposure dose can be used in a terminal and a server connected to the nosocomial information database server through a network. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a system for managing the radiation dose to which a subject is exposed by a radiological examination apparatus for each individual, and in particular, by managing the cumulative dose, it is intended to prevent excessive radiation exposure to the subject. It is what.

The rapid development of medical technology in recent years has greatly contributed to the discovery of various lesions and the understanding of lesions, enabling the early detection and early treatment of serious diseases leading to death.
In particular, the development of radiation inspection apparatuses using radiation (for example, X-rays, gamma rays, positron rays, etc.) has begun to spread widely because lesions that have been difficult to find can be easily found.
For example, an apparatus called CT (Computed Tomography) (hereinafter referred to as a CT apparatus) is an apparatus that forms an image by slicing a human body, and is generally a subject between an X-ray generator and a detector. The X-ray generator emits X-rays from the X-ray generator while rotating the X-ray generator and the detector facing each other around the subject, and the intensity of the X-rays transmitted through the subject is detected by the detector. It detects and converts the intensity into an electrical signal for imaging. That is, the internal organs of the human body have different densities and use the fact that the degree of X-ray absorption (X-ray attenuation coefficient) varies depending on the organ, and detects the intensity of X-rays transmitted through the subject. By calculating the data and converting / reconstructing it into an image, a plane through which X-rays are transmitted, that is, a slice plane obtained by cutting a human body into a circle is imaged.
In addition to the method in which the X-ray generator and the detector rotate opposite to each other, a CT device in which only the X-ray generator rotates and a number of detectors are fixedly arranged on the circumference has been developed.
In addition, a device that takes a “positron emission tomography” called PET (Positron Emission Tomography) administers a drug (FDG) containing glucose with positron (positron) into the body of the subject and accumulates the drug. It is an apparatus that measures the state with radiation and images it. This is a test method that uses the characteristic that cancer cells take in glucose that is several times that of normal cells, and because it can test the whole body with high accuracy, early cancer detection is possible. Yes. That is, the PET apparatus generates gamma rays (positron annihilation lines), measures the transmission intensity with an opposing gamma ray detector, and images the data.
In recent years, a PET-CT apparatus in which the PET apparatus and the CT apparatus are integrated has been developed and put into practical use.
In addition, inspection apparatuses using radiation, such as general X-ray imaging apparatuses, X-ray fluoroscopic imaging apparatuses, and X-ray tomography apparatuses, which are widely used, are now indispensable in the medical field.

However, in the use of various radiation inspection apparatuses as described above, the influence on the human body due to radiation exposure is a serious problem.
As a method for solving this problem, that is, excessive radiation exposure to the human body, a multi-slice CT apparatus has been developed in which a plurality of detectors are arranged and images of a plurality of slice planes are obtained by generating a single X-ray. Since the dose of X-ray exposure can be greatly reduced and a large amount of data can be obtained in a short time, a great effect is expected.
In addition, an apparatus capable of controlling the X-ray exposure dose in accordance with the radiation sensitivity of the part to be imaged has been developed. According to Japanese Patent Application No. 2003-122526, it is possible to reduce the amount of X-ray exposure to highly radiation-sensitive parts such as the eyeball and breast.

Japanese Patent Application No. 2003-122526

Many of the above-described various radiation inspection apparatuses display the exposure dose at the time of the inspection, and the inspection can be performed while checking the exposure dose of the subject.
However, the exposure dose displayed on these devices is only the amount of radiation generated calculated by the product of the tube current (mA) of the radiation generator tube and the radiation time (sec) at the time of inspection of the device. In some cases, it is only a numerical value calculated from the reference value for each organ calculated by computer simulation using a virtual human body, depending on gender and age. There is a problem that it is difficult to accurately grasp the exposure dose (effective dose) that is exposed to the target.
The actual situation is that the background of the effect of radiation exposure to the human body in the medical field, that is, in order to focus on grasping the lesion, it is recommended to conduct a precise examination with a radiological examination apparatus, and the potential for radiation exposure to the subject The effect of lack of consideration for harmful effects is not limited.

In addition, various inspection devices are developed every day, and medical institutions provide advanced medical care by introducing the convenience and usefulness of these devices to the medical field. However, all peripheral devices used with these devices are provided. At the same time, there is a problem in that it is not possible to completely replace the replacement because of the cost, and it is not possible to cope with the technology of the new medical examination apparatus.
For example, when a multi-slice CT apparatus is introduced in an environment where a conventional X-ray CT apparatus is used, a computer terminal that is sufficient for the X-ray CT apparatus has insufficient computing power and memory for the multi-slice CT apparatus. Can not cope with. This is because a multi-slice CT apparatus generates a large amount of CT images at a time, so that high computing ability and memory are required for the computer terminal to capture and process the image data.
Therefore, these inadequate computer terminals cannot detect the exposure dose from the captured image data, and in order to continue to use the inadequate computer terminal, the exposure dose is detected in the actual image data. In this situation, the calculation is performed using the reference value based on the computer simulation.
In addition, by continuously using the computer terminal with insufficient capability, the image captured by the inspection apparatus cannot be displayed on the computer display in high definition, so the diagnosis on the monitor cannot be performed, and recording on the film is performed as in the past. A method of diagnosing with film has to be taken.

On the other hand, in the current medical field, various radiation inspection apparatuses may be used together. This is because each radiological examination apparatus has an examination site that is good and an examination site that is not good, and in order to compensate for this, a method of using a plurality of radiological examination apparatuses is employed.
For example, in the examination using a PET device, since the drug FDG is excreted as urine, it accumulates in the kidneys and bladder even without cancer cells. PET, kidney cancer, bladder cancer, prostate cancer, etc. It is difficult to discriminate from the image of the apparatus. Also, some lung cancers and stomach cancers are difficult to discriminate the accumulation of FDG, and it is difficult to perform a complete examination at these sites using a PET apparatus.
Therefore, by using other examinations, for example, a CT apparatus, an MRI apparatus, and other biochemical examinations in combination, it is possible to make a comprehensive and accurate diagnosis including a portion that is difficult to discriminate with a PET apparatus.
However, in such an inspection method, the subject is exposed to radiation for each inspection by each inspection apparatus. Depending on the contents of the examination, the radiation exposure by the plurality of examination apparatuses may be performed within a short period of time, and the influence of the radiation exposure on the body of the subject is immeasurable.
However, there is generally no compatibility between the data of radiological examination apparatuses, and it is difficult to grasp the exposure dose in one apparatus at the time of examination with another apparatus, and one subject was exposed for a certain period of time. The total amount of radiation cannot be managed, and the subject is often exposed to an enormous amount of radiation without his knowledge.

The present invention solves the above-mentioned problems, and can manage the exposure dose for each examination performed by various radiological examination apparatuses and the cumulative exposure dose for a certain period, thereby preventing excessive exposure and exposure. It is a radiation exposure dose management system that enables inspection using a radiation inspection apparatus suitable for an examiner.
That is, the said subject was solved by the following radiation exposure dose management system of this invention.
(1) A radiation examination apparatus, an image management server storing an image of a body part of a subject photographed by the radiation examination apparatus, and an image information group composed of various information related to photographing of the image, and the radiation Radiation exposure in which an exposure dose management device that manages exposure dose data received by the subject during imaging in the inspection device and a hospital information database server that manages personal information of the subject are connected via a network In the dose management system,
The exposure dose management apparatus includes a function of extracting information necessary for calculating the exposure dose from the image information group stored in the image management server, and calculating the exposure dose based on the information. The radiation dose data calculated by the dose management device is transmitted to the in-hospital information database server via the network, and is recorded and stored in the personal information database of the subject in the in-hospital information database server. Dose management system.

(2) A radiation examination apparatus, an image management server storing an image of a body part of a subject photographed by the radiation examination apparatus, and an image information group including various information related to photographing of the image, and the radiation Radiation exposure in which an exposure dose management device that manages exposure dose data received by the subject during imaging in the inspection device and a hospital information database server that manages personal information of the subject are connected via a network In the dose management system,
The exposure dose management apparatus includes a function of extracting information necessary for calculating the exposure dose from the image information group stored in the image management server, and calculating the exposure dose based on the information. A radiation exposure dose management system, wherein data of an exposure dose calculated by a dose management device is transmitted to an image management server via a network and recorded and stored in an image information group in the image management server.

  (3) The exposure dose management device has a function of extracting information necessary for calculating the exposure dose from the image information group stored in the image management server, and calculating the exposure dose based on the information. (1) or (2) characterized in that it has a function of extracting information necessary for calculating the exposure dose from the personal information database of the in-hospital information database server and calculating the cumulative exposure dose based on the information. Radiation exposure dose management system described in 1.

(4) A radiological examination apparatus, an image management server, an exposure dose management apparatus, and an in-hospital information database server connected via the network, and connected to the in-hospital information database server via an in-hospital information network, an examination room, an examination room, (1) The exposure dose information disclosure function for displaying information on the exposure dose is provided in one or two or more selected from terminals and servers arranged in various places in the hospital such as a reception. The radiation exposure dose management system according to any one of to (3).
(5) Exposure for displaying information on exposure dose on a network to which the radiation examination apparatus, image management server, dose management apparatus and hospital information database server are connected, and a hospital information network connected to the hospital information database server The radiation exposure dose management system according to any one of (1) to (4), wherein an exposure dose information disclosure device having a dose information disclosure function is connected.

(6) The function for disclosing the exposure dose information is a function for calculating and disclosing the cumulative dose based on the dose data recorded and stored in the personal information database of the in-hospital information database server. A function to detect and disclose the exposed dose, a function to disclose a comparison of the cumulative annual dose with the preset annual allowable dose, and a warning if the cumulative dose may exceed the annual allowable dose 1 or 2 or more selected from among a function for issuing a radiography based on the accumulated exposure dose, a function for presenting a recommended radiographing condition at the time of radiographing with the radiographic inspection apparatus, and a function for setting the radiographic inspection apparatus with the recommended radiographing condition It has a function, The radiation exposure dose management system as described in said (4) or (5) characterized by the above-mentioned.

  (7) The image information group composed of various information related to the imaging of the image of the body part of the subject stored in the image management server is a data group in a tag format based on the DICOM standard. The radiation exposure dose management system according to any one of 1) to (6).

(8) The radiological examination apparatus includes a computed tomography (CT), a positron emission tomography (PET), and a single photon emission computed tomography (SPEC).
T: Single Photon Emission Computed Tomog
one of the above-mentioned (1) to (7), characterized in that it is a device by one or a combination of two or more selected from: R), a general X-ray diagnostic apparatus, an X-ray fluoroscopic apparatus, and an X-ray tomography apparatus Radiation exposure management system according to item.

  (9) The radiation inspection apparatus and the image management server are integrated, or the radiation inspection apparatus, the image management server, and the exposure dose management apparatus are integrated, or the image management server and the exposure dose management apparatus are integrated. The radiation exposure dose management system according to any one of (1) to (6) above, wherein

(10) a first step of reading, into the image information group of the image management server, an image information group consisting of an image of the body part of the subject imaged by the radiation examination apparatus and various information relating to the imaging of the image; A program including a second step of extracting information necessary to calculate the exposure dose received by the subject from the image information group and a third step of calculating the exposure dose based on the information. A storage medium that is stored.
(11) a first step of reading an image of a body part of a subject imaged by a radiation examination apparatus and an image information group composed of various types of information related to imaging of the image into an image information group of an image management server; A second step of extracting information necessary to calculate the exposure dose received by the subject from the image information group, a third step of calculating the exposure dose based on the information, and the exposure dose , And a fourth step for calculating a cumulative dose from information on the dose in an arbitrary database, a fifth step for comparing and disclosing the cumulative dose and a preset annual allowable dose, A storage medium storing a program including a sixth step of presenting recommended imaging conditions at the time of imaging by a radiation inspection apparatus.

(A) According to the radiation exposure dose management system of the present invention described in claim 1,
In the radiation inspection apparatus, an image management server in which an image of a body part of a subject imaged by the radiation inspection apparatus and an image information group made up of various types of information related to the imaging of the image are stored, and the radiation inspection apparatus A radiation dose management system in which an exposure dose management device that manages data of a dose received by a subject during imaging and a hospital information database server that manages personal information of the subject are connected via a network. In the exposure dose management device, the information necessary for calculation of the exposure dose is extracted from the image information group stored in the image management server, and has a function of calculating the exposure dose based on the information, The dose data calculated by the dose management apparatus is transmitted to the in-hospital information database server via the network, and the in-hospital information database The personal information database is used to record the amount of radiation that the subject has been exposed to in different types of radiation inspection equipment in a personal information database. By referring to, it is possible to easily confirm the cumulative exposure dose that the subject has been exposed so far, and it is possible to prevent excessive exposure.
Also, in this system, calculation of exposure dose extracted from the image information group in the image management server without referring to information that is not necessary for calculation of exposure dose, such as enormous image data that requires a lot of memory Therefore, the exposure dose can be calculated accurately even in an environment where a computer having no high computing ability is provided.

(A) According to the radiation exposure dose management system of the present invention described in claim 2,
In the radiation inspection apparatus, an image management server in which an image of a body part of a subject imaged by the radiation inspection apparatus and an image information group made up of various types of information related to the imaging of the image are stored, and the radiation inspection apparatus A radiation dose management system in which an exposure dose management device that manages data of a dose received by a subject during imaging and a hospital information database server that manages personal information of the subject are connected via a network. In the exposure dose management device, the information necessary for calculation of the exposure dose is extracted from the image information group stored in the image management server, and has a function of calculating the exposure dose based on the information, The dose data calculated by the dose management apparatus is transmitted to the image management server via the network and stored in the image information group in the image management server. Since the test results are recorded on the film based on the information in the image management server, the exposure dose can also be recorded and displayed on the film, and the image cannot be displayed on the display, or displayed on the display. Even in a system environment in which a diagnosis using a film image must be performed due to, for example, a blurred image, the exposure dose in the inspection can be easily confirmed on the film image.

(C) According to the radiation exposure dose management system of the present invention described in claim 3,
The exposure dose management apparatus has a function of extracting information necessary for calculating the exposure dose from the image information group stored in the image management server and calculating the exposure dose based on the information, and an in-hospital information database Since it has the function to extract the dose necessary for calculating the dose from the personal information database of the server and calculate the dose based on the information, the calculation of the dose by simulation in addition to the effect (a) In addition, the radiation dose actually exposed to the subject can be calculated automatically and accurately.

  (D) According to the radiation exposure dose management system of the present invention described in claim 4, in addition to the effects, the radiation inspection apparatus, the image management server, the exposure dose management apparatus, and the in-hospital information database connected via the network One or two or more doses selected from a server and a terminal or server connected to the in-hospital information database server via the in-hospital information network and arranged in various places in the hospital such as an examination room, an examination room, and a reception With the exposure information disclosure function that displays information related to information, doctors, laboratory technicians, and subjects can easily check the exposure dose and related information in situations where it is necessary to check the exposure dose. Therefore, it is possible to construct an inspection plan in consideration of the optimum exposure dose for the subject.

  (E) Furthermore, according to the radiation dose management system of the present invention as set forth in claim 5, the radiation inspection apparatus, the image management server, the dose management apparatus and the hospital information database server are connected, and the hospital information By connecting a dose information disclosure device with a dose information disclosure function that displays information related to the dose to the in-hospital information network connected to the database server, in the case of a poor network environment or in an existing system Even if the exposure dose information disclosure function cannot be incorporated, the exposure dose and the related information can be confirmed by the exposure dose disclosure device, so that the present system can be introduced in any environment.

(F) According to the radiation dose management system of the present invention described in claim 6, the exposure dose information disclosure function is applied to the dose data recorded and stored in the personal information database of the hospital information database server. Based on this, the function to calculate and disclose the cumulative exposure dose, the function to detect and disclose the exposure dose irradiated to a specific organ, and the comparison of the cumulative exposure dose with the preset annual allowable dose will be disclosed Functions, a function that issues a warning when the cumulative exposure dose may exceed the annual allowable dose, a function that presents recommended imaging conditions for the next radiographic inspection based on the cumulative exposure dose, and recommended imaging conditions Because it has one or more of the functions set in the radiation inspection device, it is easy to manage and confirm the exposure dose of the subject, and it is overlooked Without is or misidentified like occurs, it is possible to manage the reliable dose, it is possible to prevent the exposure of excessive radiation.

  (G) Further, according to the radiation exposure dose management system of the present invention as set forth in claims 7 and 8, image information comprising various information relating to imaging of a body part image of the subject stored in an image management server. Since the group is a tag-format data group based on the DICOM standard, the exposure dose from any radiation inspection apparatus that employs the image information group based on the DICOM standard is totalized without being restricted by the model or manufacturer of the radiation inspection apparatus. By adopting global standards, it is possible to exchange information between other medical institutions and affiliated regional facilities without being limited to the same hospital or facility. Can provide medical care that is truly beneficial to the subject.

  (H) According to the radiation exposure dose management system of the present invention described in claim 9, the radiation inspection apparatus and the image management server are integrated, or the radiation inspection apparatus, the image management server, and the exposure dose management apparatus are integrated. Or an apparatus in which the image management server and the exposure dose management apparatus are integrated, and can be easily introduced into the existing system environment.

(K) Furthermore, according to the radiation exposure dose management system of the present invention as set forth in claims 10 and 11, the radiation exposure dose management system comprises an image of a body part of a subject photographed by a radiation examination apparatus and various information relating to photographing of the image. A first step of reading the image information group into the image information group of the image management server; and a second step of extracting information necessary for calculating the exposure dose received by the subject from the read image information group A storage medium storing a program including a step and a third step of calculating an exposure dose based on the information;
Alternatively, a first step of reading an image information group consisting of an image of a body part of a subject photographed by a radiological examination apparatus and various information relating to photographing of the image into an image information group of an image management server; A second step of extracting information necessary to calculate the exposure dose received by the subject from the image information group, a third step of calculating the exposure dose based on the information, the exposure dose, and A fourth step of calculating the cumulative dose from information on the dose in an arbitrary database, a fifth step of comparing and disclosing the cumulative dose and a preset annual allowable dose, and the next radiological examination Since it can be configured as a storage medium that stores a program including the sixth step for presenting recommended shooting conditions at the time of shooting by the apparatus, It is easy.

  As described above, according to the radiation exposure dose management system of the present invention, it is possible to safely perform inspections using various radiation inspection apparatuses developed by the state-of-the-art technology without causing the subject to worry about excessive radiation exposure. Because it is possible to build a radiological examination environment that gives sufficient consideration to the health of subjects who can be tested with care, and to provide optimal medical services to the subjects, early detection of lesions and appropriate treatment are possible, enabling medical treatment Trust can be increased.

1 is an overall configuration diagram of an embodiment of a radiation exposure dose management system according to the present invention. The flowchart figure of the radiation exposure dose management system of this invention The figure explaining extraction of information required for calculation of exposure dose from the image information group of the image management server by the exposure dose management device The figure explaining the transmission to the network server of the exposure dose information calculated with the exposure dose management apparatus Explanatory drawing of the flow in which the information necessary for calculating the exposure dose is extracted from the image information group of the image management server by the exposure dose management apparatus, and the calculated exposure dose information is recorded and stored in the image management server The figure which shows the example of the information object in CT image defined by DICOM standard The figure explaining one Example of an exposure dose information disclosure function The figure explaining one Example of an exposure dose information disclosure function The figure explaining the other Example of an exposure dose information disclosure function

Hereinafter, embodiments of the radiation exposure dose management system of the present invention will be described.
FIG. 1 is an overall configuration diagram of a radiation exposure dose management system of the present invention, FIG. 2 is a flowchart of the radiation exposure dose management system of the present invention, and FIG. 3-1 is an image management server of the exposure dose management apparatus. It is a figure explaining extraction of information required for calculation of exposure dose from a group of image information, and Drawing 3-2 is a figure explaining transmission to a network server of exposure dose information computed by an exposure dose management device. . FIG. 4 is an explanatory diagram of a flow in which information necessary for calculating the exposure dose is extracted from the image information group of the image management server by the exposure dose management apparatus, and the calculated exposure dose information is recorded and stored in the image management server. . 5 is a diagram illustrating an example of an information object in a CT image defined by the DICOM standard, FIGS. 6A and 6B are diagrams illustrating an example of an exposure dose information disclosure function, and FIG. It is a figure explaining the other Example of an exposure dose information disclosure function.
In the figure, 1 is an exposure dose management apparatus, 2 is a radiation examination apparatus, 3 is an image management server, 4 is an in-hospital information database server, 4a is a personal information database, 5 is an image, 6 is an image information group, and 10a is exposure dose data. Table, 10b is a blank space (Private Tag), 10c is exposure dose data, 20 is a CT apparatus, 30a is an image of a subject, 30b is an image information group, 30c is a blank space (Private Tag) 40a is a terminal, 40b is Server, 80 is a display screen, 81 is an information group display unit, 82 is a region, 83 is a slice image, 84 is information necessary for calculating the exposure dose, 85 is an upper numerical value input unit, 86 is a lower numerical value input unit, 87 Is an entire area image, 88 is an area selection image, 90 is a display screen, 91 is a subject information section, 92 is a period display section, 93 is an examination history display section, 94 The cumulative exposure dose display unit, 95 to 99 is a functional button.

The radiation exposure dose management system of the present invention includes a radiation inspection apparatus 2, an image management server 3, an exposure dose management apparatus 1, and a hospital, as shown in the overall configuration diagram of the radiation exposure dose management system of the present invention in FIG. An information database server 4 is connected via a network N.
The radiological examination apparatus 2 is an examination apparatus used for diagnosing diseases and health examinations in medical institutions such as hospitals, clinics, medical checkups, and other examination facilities. For example, a computed tomography apparatus (CT: Computed Tomography) ), Positron emission tomography (PET), single photon emission computed tomography (SPECT), general X-ray diagnostic equipment, and other X-ray diagnostic equipment. Here, the radiation refers to an X-ray, a gamma ray, a positron beam, or the like that is used in the radiation inspection apparatus and has a concern about the influence on the human body.
The radiation inspection apparatus 2 is a composite apparatus in which two or more of the above-mentioned various types of radiation inspection apparatuses are combined, such as a computer tomography diagnosis apparatus (CT) and a PET-CT apparatus combining a positron emission tomography apparatus (PET). There may be.
Moreover, the radiotherapy apparatus which performs a treatment using a radiation can also be included.

  The image management server 3 according to the present invention stores an image of an organ in the body of a subject taken by the radiation inspection apparatus 2 such as a CT apparatus or a PET apparatus, and an image information group (described later) regarding the image. In general, images taken with a medical examination apparatus include JPEG (Joint Photographic Coding Expert Group) part 1, JBIG (Joint Bi-level Image Expert Group), and compressed video images. Is stored in the image management server 3 as image data compressed by MPEG (Moving Picture Experts Group) or the like, which is an international standard. At that time, regarding the stored image data, the personal information of the subject, the setting values of the radiation examination apparatus at the time of imaging, and the like are stored as an image information group attached to the image data.

The image information group includes the American College of Radiology.
DICOM (Digital Imaging and Comm), an image transmission standard for medical images generated by Radiology and the National Electrical Manufacturers Association
automatically stored from the radiation examination apparatus according to a format defined by the “universations in medicine”, inputted by a doctor or engineer who operates the apparatus, or electronic medical records or radiation examinations via a network of medical institutions And the like transmitted from the apparatus.
However, at present, the DICOM standard is adopted as a standard for digital image recording and communication in medicine in the world including the United States, including Japan. This is because the DICOM standard is generated in a format that allows communication of medical image information regardless of the manufacturer of the device. In addition, the storage medium can be used without limitation, and TCP / IP is used as a network protocol. This is because a comprehensive medical image management and image filing system can be realized in a hospital information system (Hospital Information System), a regional medical network, and a global network based on the Internet.
Therefore, the image information group in the radiation exposure dose management system of the present invention is most preferably stored in a format defined by the DICOM standard.

The present invention is not limited to the type of radiation inspection apparatus, and comprehensively manages information related to the radiation exposure dose of the subject. Adopting the image information group according to the DICOM standard is used only within one medical institution. This is the most effective because it can exchange information with other medical institutions and manage information.
Hereinafter, in the embodiment of the radiation exposure dose management system of the present invention, a case where an image information group according to the DICOM standard is employed will be described.
Of course, the radiation exposure dose management system of the present invention can be adopted as long as it records information about an image as an attribute for the image, instead of the image information group according to the DICOM standard.

The in-hospital information database server 4 in the present invention is a database server for managing information such as a patient's medical history and examination history such as a patient in a medical institution and a subject undergoing an examination. Personal information such as name, contact information, and ID, and information such as each medical history, examination history, and examination history are recorded and stored.
With the widespread use of electronic medical records, much of the information on patients, subjects undergoing examinations, etc. has been made into a database and managed by a server.
In the present invention, there is provided an in-hospital information database server 4 that manages and manages patient and subject information in a medical institution, and the in-hospital information database server 4 and each terminal in the network are connected to each other. It is best to have an environment where information can be exchanged, but even if the environment is not necessarily equipped with an in-hospital information database server, patient and subject information is managed, and there is some information for each examination. If it is recorded and saved in a form and can be referred to by a doctor or engineer, it can be sufficiently adopted.
In the present invention, the term “subject” means any person who is examined by the radiation examination apparatus 2, and includes not only patients who are admitted to the hospital or patients who are outpatient, but also hospitals and various facilities. It includes all those who undergo examinations using radiological examination equipment as part of a medical checkup and health checkup.

The exposure dose management device 1 according to the present invention extracts information necessary for calculating the exposure dose from the image information group stored in the image management server 3 and calculates the exposure dose based on the information. And the function of transmitting the calculated dose data to the in-hospital information database server 4 via the network.
Further, the exposure dose management apparatus 1 extracts information necessary for calculating the exposure dose from the image information group stored in the image management server 3, calculates the exposure dose from the information, and calculates the calculated exposure dose. A function for transmitting dose data to the image management server 3 via a network may be provided.
When receiving the exposure dose data from the exposure dose management apparatus 1, the image management server 3 records and stores it in the image information group in the image management server.
The image information group of the image management server 3 is information in which information about the image is recorded and stored as an attribute of the image. When the image is displayed on the screen of the display or recorded on the film, the screen or film is recorded. Important information in the image information group is displayed and recorded on the screen.
Therefore, the exposure dose data calculated by the exposure dose management apparatus 1 is recorded and saved in the image information group of the image management server 3 so that the image is displayed on the display and recorded on the film or the film. Exposure dose can be displayed and recorded.

In the present invention, the radiation examination apparatus 2, the image management server 3, the exposure dose management apparatus 1, the in-hospital information database server 4, and the in-hospital information database server 4 connected via the network N are connected via the in-hospital information network N ′. One or more selected from the terminal 40a and the server 40b arranged in various places in the hospital such as the examination room, the examination room, and the reception are provided with a dose information disclosure function for displaying information on the dose.
The exposure dose information disclosure function calculates and discloses a cumulative exposure dose based on the exposure dose data of the subject calculated and stored in the personal information database 4a of the in-hospital information database server 4 by the exposure dose management apparatus 1. A function to detect and disclose the radiation dose irradiated to a specific organ, a function to disclose a comparison between the cumulative exposure dose and a preset annual allowable exposure dose, the cumulative exposure dose and the annual allowable exposure dose Any of the functions for issuing a warning when there is a risk of overexposure compared to the above, the function for presenting recommended imaging conditions at the time of imaging with the next radiographic inspection apparatus, and the function for setting the recommended imaging conditions in the radiological inspection apparatus Or one or more.
Information disclosed by the exposure dose disclosure function is calculated and displayed based on information recorded and stored in the in-hospital information database server 4. The function itself of extracting and calculating information from the in-hospital information database server 4 can be provided in the exposure dose management apparatus 1 and read and disclosed from the dose management apparatus 1 by a program for controlling the exposure dose disclosure function. However, a function for extracting and calculating information from the in-hospital information database server 4 can be incorporated into the program itself for controlling the exposure dose disclosure function.
The exposure dose disclosure function includes the radiation inspection apparatus 2, the image management server 3, the exposure dose management apparatus 1, the in-hospital information database server 4, and the terminals 40a and servers arranged in various places in the hospital such as examination rooms, examination rooms, and receptions. 40b can be provided in any or all of them, and the functions required for each device can be appropriately selected and provided.

The exposure dose information disclosure function is a function provided to effectively use the exposure dose data calculated by the exposure dose management device 1 for in-hospital treatment and examination. For example, the exposure dose information disclosure function is provided in the radiation inspection device 2 or the image management server 3. By providing a function for disclosing information on the patient's exposure dose, doctors and technicians in the laboratory can check the cumulative exposure dose of the subject before performing the test, and receive the information for the annual allowable exposure. It is possible to compare with the dose or confirm the recommended imaging conditions detected from the cumulative exposure dose of the subject for the radiological examination to be performed in the future.
Furthermore, by using the function to set the recommended imaging conditions in the radiation inspection equipment, the recommended imaging conditions are automatically set in the radiation inspection equipment to be used in the future. Enable execution.
In addition, by providing the dose information disclosure function in the terminal 40a of each examination room connected to the in-hospital information database server 4, the accumulated dose of the subject can be confirmed at the time of the examination, and the next examination is performed based on the information. A plan can be made, and an examination plan with the least burden on the body of the subject can be made.

In addition, the radiation exposure function is disclosed in the radiation examination apparatus 2, the image management server 3, the exposure dose management apparatus 1, the in-hospital information database server 4, and the terminal 40a and the server 40b arranged in the hospital such as the examination room, the examination room, and the reception. In addition, a dose information disclosure device having a dose disclosure function can be connected to the network N and the in-hospital information network N ′.
By connecting the exposure dose disclosure device to the networks N and N ′, information can be confirmed by the exposure dose disclosure device when the exposure dose data cannot be referred to by the device or the terminal.
Furthermore, when each device or terminal such as the dose management device 1, the radiation inspection device 2, the image management server 3, the in-hospital information database server 4 or the like cannot be provided with an exposure dose disclosure function, When information disclosure devices are connected, or when each device or terminal and exposure dose information disclosure device are integrally formed, even if the hospital network is in a poor environment, information on the exposure dose is confirmed by the exposure dose information disclosure device. be able to.
That is, the system can be introduced into any environment by arranging the exposure dose disclosure device.

In the exposure dose management system of the present invention, as shown in the flowchart of the radiation exposure dose management system of the present invention in FIG. 2, first, radiation imaging is performed on the subject in the first step S1 [imaging by radiation inspection apparatus]. Then, in the second step S2 [Save image and image information group in image management server], the image of the subject photographed by the radiation examination apparatus 2 and the image information group related to the image are saved in the image management server 3. . Then, in the third step S3 [reading the image information group of the image management server], the exposure dose management apparatus 1 reads the image information group stored in the image management server 3, and the fourth step S4 [read image read]. In the information extraction from the information group], the exposure dose management apparatus 1 extracts information necessary for calculating the exposure dose received by the subject from the image information group read in the third step S3, In step S5 [calculate exposure dose from extracted information], the exposure dose is calculated, and exposure dose data is created.
The created exposure dose data is transmitted from the exposure dose management apparatus 1 to the in-hospital information database server 4 and / or the image management server 3 in the sixth step S6 [transmit the exposure dose data to the in-hospital information database server].
The exposure dose data transmitted from the exposure dose management apparatus 1 to the in-hospital information database server 4 in the sixth step S6 is recorded and stored in the personal information database 4a of the in-hospital information database server 4 and transmitted to the image management server 3. The exposure dose data is recorded and stored in the corresponding image information group of the image management server 3.
The dose data recorded and stored in the in-hospital information database server 4 can be referred to from the terminal 40a or the server 40b arranged in the examination room or examination room connected by the in-hospital information network N, and can be used for examination or examination. The exposure dose data recorded and stored in the image information group of the image management server 3 can be referred to by recording the numerical value on the film at the same time when the image is recorded on the film.

Next, an embodiment of the exposure radiation management system of the present invention will be described in detail with reference to the drawings.
FIGS. 3A and 3B are diagrams for explaining the process of extracting information necessary for calculating the exposure dose from the image information group of the image management server by the exposure dose management apparatus. Hereinafter, the flowchart of FIG. Description will be made along the order of steps S1 to S7 shown.
First, in the first step S1, the subject is photographed by the radiation inspection apparatus (CT apparatus 20 in FIG. 3A).
In the second step S2, the image 30a of the subject photographed by the CT apparatus 20 and the image information group 30b related to the image 30a are stored in the image management server 3.
In the present embodiment, the image information group 30b is composed of a tag-format data group based on the DICOM standard.
The data group according to the DICOM standard includes the personal information of the subject [for example, the ID (Patient ID), name (Patient's Name), gender (Patient's) of the subject.
(Sex), age (Patient's Age, etc.)] and information defined for each of the radiation inspection apparatuses.
For example, in the case of the CT apparatus 20, the information defined for each radiation examination apparatus is an image type (image type) as shown in FIG. 5 “Example of information object in CT image defined by DICOM standard”. [Tag number (0008, 0008)], Samples per Pixel (sample per pixel) [Tag number (0028, 0002)], Photometric Interpretation (tag measurement (0028, 0004)), Bits Allocated (assignment bit) ) [Tag number (0028, 0100)] • Bits Stores (stored bit) [Tag number (0028, 0101)] • High Bit (high order bit) [Tag number (0028, 0102)], Scale Intercept (Rescale section) [Tag number (0028, 1052)], Rescue Slope (Rescale slope) [Tag number (0028, 1053), KVp (peak kilovolt output of the X-ray generator used) [Tag number (0018, 0060) ] Is a group of information at the time of imaging by the “CT apparatus” defined in common with the “CT apparatus”, and each attribute has an attribute name (Attribute Name) to which each information is matched and an associated name. Recorded by the tag number (Tag).

In the DICOM standard, other radiation inspection apparatuses also define a group of information that is commonly recorded in each apparatus, and each attribute is assigned an attribute name and a tag number corresponding thereto. Saved. And since the tag number is assigned the same number for the information of the common attributes of all the radiation inspection apparatuses, referring to an arbitrary tag number, the attribute number of each of the radiation inspection apparatuses is assigned the tag number. Information can be recognized.
For this reason, in the radiation exposure dose management system of the present invention, information necessary for calculating the exposure dose is recorded with a tag number, so that an image taken with any radiation inspection apparatus can be obtained simply by referring to the tag number. It is possible to extract all the information necessary for calculating the exposure dose from the image information group related to.

In the third step S3, the dose management apparatus 1 reads the image information group 30b of the image management server 3, and in the fourth step S4, information necessary for calculating the exposure dose from the read image information group 30b. To extract. In the embodiment shown in FIG. 3A, the exposure dose management apparatus 1 extracts information necessary for calculating the exposure dose from the read image information group 30b by the tag number, and stores the exposure dose data table 10a. create. A tag number is recorded in advance in the dose data table 10a, and information corresponding to the tag number is extracted from the image information group 30b of the image management server 3 and read into the dose data table 10a. .
When necessary information is extracted, the exposure dose is calculated as a fifth step S5. In the first embodiment, the calculated exposure dose is written in the blank space (Private Tag) 10b of the exposure dose data table 10a of the exposure dose management apparatus 1 in the sixth step S6, and the exposure dose data 10c is created.

The exposure dose data 10c created in the fifth step S5 is transmitted to the in-hospital information database server 4 in the sixth step S6. Then, it is recorded and stored in the personal information database 4 a of the subject subject managed by the in-hospital information database server 4.
The in-hospital information database server 4 can transmit / receive information to / from the terminal 40a and the server 40b arranged in the examination room, examination room, reception, etc. via the in-hospital information network N ′. At the same time, it can be referred to and used at each terminal such as an examination room, an examination room, and a reception through the in-hospital information network N ′.

FIG. 4 shows a flow in which information necessary for calculating the exposure dose is extracted from the image information group 30b of the image management server 3 by the exposure dose management apparatus 1, and the calculated exposure dose information is recorded and stored in the image management server 3. It is explanatory drawing of.
The first step S1 to the fourth step S4 are the same as those in the above-described embodiment. As the first step S1, the subject is photographed by the radiation inspection apparatus (CT apparatus 20 in FIG. 4), and the second step. In S <b> 2, the image 30 a of the subject photographed by the CT apparatus 20 and the image information group 30 b related to the image 30 a are stored in the image management server 3.
Then, in the third step S3, the exposure dose management apparatus 1 reads the image information group 30b of the image management server 3, and extracts information necessary for calculating the exposure dose from the image information group 30b read in the fourth step S4. To do.
Also in the second embodiment shown in FIG. 4, the exposure dose management apparatus 1 extracts information necessary for calculating the exposure dose from the read image information group 30b by the tag number, and creates the exposure dose data table 10a. A tag number is recorded in advance in the dose data table 10a, and information corresponding to the tag number is extracted from the image information group 30b of the image management server 3 and read into the dose data table 10a. .
When necessary information is extracted, the exposure dose is calculated as a fifth step S5. In the second embodiment, the calculated exposure dose is written in a blank space (Private Tag) 30c of the image information group 30b stored in the image management server 3 in the sixth step S6.

As described above, the exposure dose calculated in the fifth step S5 is stored in the image information group 30b in the sixth step S6, and thus is stored as an attribute of the photographed image.
The image information group 30b is image attribute information composed of personal information of a subject imaged by the radiation inspection apparatus and information defined for each of the radiation inspection apparatuses used for imaging, and is defined in the DICOM standard. The blank space 30c for writing arbitrary information in addition to the information based on the above can be provided, and in the present invention, the dose data calculated by the dose management apparatus 1 is stored in the blank space 30c. Write and save.
By writing and storing the exposure dose data in the image information group 30b, the information is recorded as image attributes. Therefore, the captured image is recorded on the film without referring to the personal information database 4a of the in-hospital information database server 4. When recording, exposure dose data can also be recorded as numbers on the film.
Especially in medical institutions that do not have a high-performance terminal, it is impossible to display the images taken by the subject. It is possible to record and display the exposure dose together with the name, gender, photographing location, etc. of the person, and it is possible to sufficiently examine the dose at the examination and examination scenes, and to protect the subject.

In the radiation exposure dose management system of the present invention, the radiation inspection apparatus 2, the image management server 3, the exposure dose management apparatus 1, and the in-hospital information database server 4, and the in-hospital information database server 4 and the in-hospital information network N connected by the network N One or more of the terminal 40a and the server 40b connected to each other in the hospital such as the examination room, examination room, and reception can be provided with a dose information disclosure function for displaying information on the dose.
6A and 6B are diagrams for explaining an embodiment of the exposure dose information disclosure function.
FIG. 6A shows an image stored in the image management server 3, information necessary for calculating the exposure dose extracted from the image information group 30b of the image management server 3, and a display screen 80 for the calculated exposure dose. ing.
In the display screen 80, information recorded and stored in the image information group 30b (see FIG. 3) (in FIG. 6A, DICOM header information according to the DICOM standard) is displayed on the information group display unit 81. Then, the entire area obtained by imaging the subject with the radiation inspection apparatus is displayed as an entire area image 87.
In addition, a slice image 83 photographed by the radiation inspection apparatus that is the object of the information is also displayed so that it can be confirmed.
Information 84 necessary for calculating the exposure dose from the image information group 30b [for example, Tube Potential (tube voltage), Tube Current (tube current), Body Region (imaging area), Exposure time (exposure time) , Slice
Thickness (slice thickness) and the like] and the calculated exposure dose 840 [Effective Dose (effective dose)] are displayed so that they can be confirmed at a glance.

Further, on this display screen 80, the area 82 for calculating the exposure dose can be arbitrarily changed, and information in the changed area can be displayed. Therefore, an area selection image 88 for selecting the area 82 is displayed in comparison with the entire area image 87.
In FIG. 6A, the area 82 for calculating the exposure dose is from the chest to the waist (upper end 22 mm, lower end −408 mm). However, when it is desired to check the exposure dose only for a specific organ, for example, the chest, that area. 82 can be changed to a region 82a (upper end -62 mm, lower end -209) as shown in FIG. The change from the region 82 to the region 82a is performed by inputting arbitrary numbers to the upper numerical value input unit 85 and the lower numerical value input unit 86, for example. 6A and 6B, in the change from the region 82 to the region 82a, the numerical value of the upper numerical value input unit 85 is changed from 22 to -62, and the numerical value of the lower numerical value input unit 86 is changed from -408. It has been changed to -209. Since the areas 82 and 82a can be confirmed in the area selection image 88 on the screen simultaneously with the change of the numerical value, it is easy to select a specific part, and it is necessary to calculate the exposure dose by changing the areas 82 and 82a by changing the numerical value. Since the following information 84 is calculated and displayed, and the exposure dose 840 is also automatically calculated and displayed, it is possible to easily confirm the exposure dose at a specific site (specific organ).
This is because doctors and laboratory technicians confirm the contents of the examinations already received and the exposure dose on this display screen 80, and based on the data, which part (organ) is to be examined in the future radiation examination It is possible to calculate in advance how much accumulated exposure dose will be, and it is possible to plan an optimal radiological examination for the subject.

  In the exposure dose management apparatus 1 of the radiation exposure dose management system of the present invention, the exposure dose (840) is automatically calculated from the information necessary for calculating the exposure dose extracted from the image information group 30b. It is programmed so that can be calculated. The program can adopt an existing means (calculation formula or the like) in which a calculation method of exposure dose and a calculation process are incorporated.

  Below, an example of the calculation method of exposure dose is shown. In this calculation method, the calculation is performed in consideration of not only the exposure dose of the irradiated radiation but also the exposure dose due to the radiation scattered from the radiation (scattered radiation). In order to simplify the explanation, a factor simulated by the Monte Carlo method, which is one of the absorption line calculation methods, is employed for the exposure dose of scattered radiation. Of course, it goes without saying that the calculation of the exposure dose due to scattered radiation can be a program that extracts and calculates actual numerical values.

In an example of the following calculation method, an examination with a multi-slice CT apparatus is assumed as the radiation examination apparatus 2.
When imaging is performed by the radiation inspection apparatus 2, information at the time of imaging, that is, an information group including an image of a body part of the subject and various types of information related to imaging of the image is stored in the image management server 3. In the exposure dose management apparatus 1, information necessary for calculating the exposure dose is extracted from the image information group stored in the image management server 3.

Here, the information extracted for calculating the exposure dose is shown below. In this example, the information group is a tag-type data group based on the DICOM standard.

Tag attribute name Information content
0018 0015 Body Part Examined NECK
0018 0060 Tube Potential 120kV
0018 1151 Tube current 500mA
0019 1027 Scan time 0.5s per rotation

0018 0050 Slice thickness 1.25mm
0019 1023 Table-translation (mm) / tube-rotation (Table movement speed)
7.5mm / rot
0043 1027 helical pitch 1.5
0018 1302 Scan length 105mm

The following information is calculated from the information group.
1. Exposure
= Tube current (tube current) x Scan time (exposure time)
= 500mA x 0.5s per rotation
= 250mAs
2. Beam collimation
= Table-trans (table movement speed) / helical pitch (helical pitch)
= 7.5 / 1.5
= 5mm
3. Slices per rotation (N)
= Beam collimation (beam width) / Slice thickness
= 5mm / 1.25mm
N = 4

In the exposure dose management apparatus 1, the exposure dose is calculated from information already recorded and stored in the apparatus 1 and information extracted from the information group of the image management server 3.
The information recorded and stored in the exposure dose management apparatus 1 is information (numerical values) necessary for calculating the exposure dose, such as predetermined values, measurement values, coefficients, and simulation factors by the Monte Carlo method. Necessary information (numerical values) is appropriately selected based on the calculation method of the exposure dose. Here, it is assumed that the following information is selected.

<Selected information>

1. CT system-specific air dose index (Scanner data)
nCTDIair = 0.26mGy / mAs
2. Ratio of ideal X-ray output beam width and actual X-ray output beam width (Overbeam correction factor)
Kob = 1.31
3. Factors specific to CT equipment [scanner category II]
Kct = 0.9
4). Mean organ dose factor within the scan range (mean organ dose factor)
fmean = 0.0047

Then, the exposure dose management apparatus 1 calculates the exposure dose.
The calculation of exposure dose is based on a calculation program incorporated in advance. In this calculation method, calculation is performed by executing a program configured by the following flow.

1. CT dose index CTDIair is calculated.
CTDIair = nCTDIair × Q (Q = exposure exposure)
= 0.26 mGy / mAs x 250 mAs
= 65 mGy ... << 1 >>

2. The total CT dose index is calculated considering the exposure dose of scattered radiation.
CTDIair = << 1 >> × Overbeam correction factor
= 65mGy × 1.31 (Overbeam correction factor Kob = 1.31)
= 85.2 mGy ... << 2 >>

3. Calculate the value DLP (Dose Length Product) taking into account the dose and scan range defined for dose assessment of the entire examination.
DLPair = << 2 >> × In / (bw × pt) (In = scan range, bw = beam width, pt = helical pitch)
= 85.2 mGy x 10.5 cm / (0.5 cm x 1.5)
= 1192.8 mGycm ... << 3 >>

4). An exposure dose (effective dose) E is calculated.
E = << 3 >> x mean organ dose factor x scanner category II
= 1192.8 mGycm × 0.0047 mSv / mGycm × 0.9
(Mean organ dose factor fmean = 0.0047)
(Scanner category II Kct = 0.9)
= 5.0 mSv

The exposure dose calculated as described above is recorded and stored in the personal information database 4a in the in-hospital information database server 4.
The calculation method shown above is an example, and a known method for calculating the exposure dose actually exposed to the subject can be selected in accordance with the system configuration.

  In the radiation exposure dose management system of the present invention, a radiation inspection apparatus 2, an image management server 3, an exposure dose management apparatus 1, and an in-hospital information database server 4 connected to the network N with a dose information disclosure function as shown in FIG. , And connected to the in-hospital information database server 4 through the in-hospital information network N ′, and can be displayed on the terminal 40a, the server 40b, etc. arranged in various places in the hospital such as the examination room, the examination room, the reception, etc. It is possible to easily confirm the exposure dose in a room, examination room, consultation room, reception area, etc. where it is necessary to confirm the dose information.

  The exposure dose information disclosure function shown in FIG. 6A and FIG. 6B is one example, and the exposure dose information disclosure function includes the exposure dose recorded and stored in the personal information database 4a of the in-hospital information database server 4. Discloses the function to calculate and disclose the cumulative exposure dose based on the data, the function to calculate and disclose the exposure dose irradiated to a specific organ, and the comparison between the cumulative exposure dose and the preset annual allowable exposure dose Function, a function that issues a warning when there is a risk of excessive exposure compared to the annual allowable dose and the annual allowable dose, a function that presents recommended imaging conditions at the time of imaging with the next radiation inspection apparatus, and the recommended imaging conditions It is preferable to provide any one or more of the functions set in the inspection apparatus.

FIG. 7 is a diagram for explaining another embodiment of the exposure dose information disclosure function.
FIG. 7 is a display screen disclosing information on the exposure dose based on the exposure dose data recorded and stored in the personal information database 4a of the in-hospital information database server 4.
In this display screen 90, exposure dose data is extracted and disclosed from the information recorded and stored in the personal information database 4a (see FIG. 1) of the in-hospital information database server 4.
The display screen 90 is displayed on the subject information unit 91 for displaying the personal information of the subject in the personal information database 4a, the period display unit 92 for arbitrarily specifying the period for confirming the exposure dose, and the period display unit 92. An accumulated dose display unit 94 for displaying the accumulated dose within a given period, and an examination history display unit 93 for displaying examinations performed by the radiation examination apparatus within the period displayed on the period display unit 92 in time series. It has been.

On the display screen 90, function buttons 95 to 99 for displaying more detailed information are arranged.
The function buttons 95 to 99 each have a function for displaying detailed information, and FIG. 7 shows an example thereof. In FIG. 7, function buttons 95 to 99 are function buttons 95 that detect and disclose the radiation dose irradiated to a specific organ within the period displayed on the period display unit 92, based on age, sex, body shape, and the like in advance. A function button 96 for comparing and disclosing the set annual allowable dose and the actually received dose, a function button 97 for presenting a recommended imaging condition at the time of imaging by the next radiation inspection apparatus based on the accumulated exposure dose, and A function button 98 for setting the recommended imaging conditions in the radiation examination apparatus, a function button 99 for arbitrarily transferring information disclosed on the display screen 90, a function button for displaying a graph for explanation, or information. Function buttons for printing are displayed.

In addition, the function button 96 for comparing and disclosing the annual allowable dose and the actual received dose is displayed on the function button 96, in addition to the function for disclosing the comparison with the annual allowable dose actually received. By providing a function that issues a warning when there is a risk of exceeding or exceeding the annual allowable dose, attention to laboratory technicians and doctors can be promoted.
The function button 98 for setting the recommended imaging conditions in the radiation inspection apparatus is used to directly set the conditions in the radiation inspection apparatus after calculating the imaging conditions for the next inspection. This eliminates the need for manual setting by a doctor and a doctor, and enables an examination under imaging conditions suitable for the subject.
In addition, the function button 99 for arbitrarily transferring the information disclosed on the display screen 90 allows only the exposure dose data to be transmitted to, for example, a medical institution or examination institution that is affiliated in the area, not in the hospital. Even when examinations are performed at different facilities, it is possible to mutually confirm the dose information, and by sharing the information, it is possible to provide an optimal radiological examination for the subject.

The exposure dose information disclosure function is preferably incorporated in any device in the facility or hospital so that information can be disclosed and confirmed as necessary. For example, the exposure dose is displayed on the display screen of an existing electronic medical record. For example, a doctor, a laboratory technician, and a subject can confirm the exposure dose information of the subject by installing a button for information disclosure and selecting the button.
In addition, even in the case of an existing system in which it is difficult to introduce the exposure dose disclosure function, the exposure dose information disclosure device having the exposure dose disclosure function is connected to the network N or the in-hospital information network N ′ so that the examination room or examination By placing it at the room or at the consultation desk of the subject, it is possible to easily confirm information on the exposure dose at these locations.
The information disclosed by the exposure dose information disclosure function is not limited to the above-described information, and information necessary for maintaining the health management of the subject can be arbitrarily displayed. Even if not all of the above information is disclosed, the function to detect and disclose the cumulative exposure dose, the function to detect and disclose the exposure dose irradiated to a specific organ, the preset annual allowable exposure A function to disclose a comparison with the dose, a function to issue a warning when there is a risk of overexposure by comparing the exposure dose with the annual allowable dose, and a function to present the recommended imaging conditions for the next radiographic inspection , As long as it has one or more of the functions for setting the recommended imaging conditions in the radiation inspection apparatus, the optimum information disclosure is made in consideration of the facility, equipment, environment, etc. in which the system is used. Functions may be selected and adopted in a timely manner.
Further, the display means is not limited to the one shown in the above-described embodiment, and a display method based on the policy of each hospital or facility, the in-hospital system, or in accordance with the display means may be adopted.

In the radiation dose management system of the present invention, the radiation inspection apparatus 2 and the image management server 3 are integrated, or the radiation inspection apparatus 2, the image management server 3 and the exposure dose management apparatus 1 are integrated, Or the image management server 3 and the exposure dose management apparatus 1 may be integrated, and the form will not be limited if each function is provided.
Further, the exposure dose management apparatus 1 may be an integrated apparatus incorporated in the in-hospital information database server 4, and is preferably configured in consideration of the environment and facilities in which the system is constructed.

Furthermore, the exposure dose management system of the present invention can be operated on a computer-readable storage medium storing the system operation program.
That is, it is a thing of the following structural examples.
One of them is a first step of reading an image taken by the radiation examination apparatus 2 and an image information group of the image management server 3 in which the image information group related to the image is stored, and among the read image information group, A computer-readable storage medium storing a program including a second step of extracting information necessary for calculating the exposure dose received by the subject from the third step and a third step of calculating the exposure dose based on the information It is.
As another example, a first step of reading an image information group of an image management server 3 in which an image of a subject photographed by the radiation examination apparatus 2 and an image information group related to the image are stored; A second step of extracting information necessary for calculating the exposure dose received by the subject from the image information group, a third step of calculating the exposure dose based on the information, the exposure dose and an arbitrary database The fourth step of calculating the cumulative dose from the information on the exposure dose, the fifth step of comparing and disclosing the cumulative dose and the preset annual allowable dose, and the next radiographic inspection apparatus And a sixth step of presenting recommended photographing conditions. A computer-readable storage medium storing a program.
Thus, by configuring the storage medium storing the radiation exposure dose management system of the present invention, the present system can be easily introduced into any environment.
As a storage medium, a well-known information storage medium such as a CD-ROM, DVD-ROM, DAT, MO, flash memory, USB memory, memory card, hard disk, various magnetic storage media, various optical storage media, etc. is adopted. can do.

DESCRIPTION OF SYMBOLS 1 Exposure dose management apparatus 2 Radiation examination apparatus 3 Image management server 4 Hospital information database server 4a Personal information database 5 Image 6 Image information group 10a Dose data table 10b Blank space (Private Tag)
10c Exposure dose data 20 CT apparatus 30a Image of subject 30b Image information group 30c Blank space (Private Tag)
40a terminal 40b server 80 display screen 81 information group display section 82 area for calculating exposure dose 82a area for calculating exposure dose 83 slice image 84 information necessary for calculation of exposure dose 85 upper end numerical input section 86 lower end numerical input section 87 Whole area image 88 Area selection image 90 Display screen 91 Subject information part 92 Period display part 93 Examination history display part 94 Cumulative dose display part 95-99 Function buttons 840 Dose N, N 'network

Claims (9)

A radiological examination apparatus;
An image management server in which an image of a body part of a subject photographed by the radiation examination apparatus and an image information group including various information related to photographing of the image are stored;
A dose management device for managing data of a dose received by the subject at the time of imaging in the radiation inspection device and a hospital information database server for managing personal information of the subject;
In radiation exposure dose management system connected via network,
The exposure dose management device is provided with a function of extracting information necessary for calculating the exposure dose from the image information group stored in the image management server, and calculating the exposure dose based on the information,
The dose data calculated by the dose management apparatus is transmitted to a hospital information database server via a network, and is recorded and stored in the personal information database of the subject of the hospital information database server. Radiation exposure dose management system. A radiological examination apparatus;
An image management server in which an image of a body part of a subject photographed by the radiation examination apparatus and an image information group including various information related to photographing of the image are stored;
A dose management device for managing data of a dose received by the subject at the time of imaging in the radiation inspection device and a hospital information database server for managing personal information of the subject;
In radiation exposure dose management system connected via network,
The exposure dose management device is provided with a function of extracting information necessary for calculating the exposure dose from the image information group stored in the image management server, and calculating the exposure dose based on the information,
Radiation dose management characterized in that dose data calculated by the dose management device is transmitted to an image management server via a network and recorded and stored in an image information group in the image management server. system.   The exposure dose management apparatus has a function of extracting information necessary for calculating the exposure dose from the image information group stored in the image management server and calculating the exposure dose based on the information, and an in-hospital information database The radiation exposure dose according to claim 1 or 2, comprising a function of extracting information necessary for calculating the exposure dose from a personal information database of the server and calculating a cumulative exposure dose based on the information. Management system.   A radiation examination apparatus, an image management server, an exposure dose management apparatus, an in-hospital information database server, and an in-hospital information database server connected to the in-hospital information network via the in-hospital information network. The exposure dose information disclosure function for displaying information on the exposure dose is provided in one or two or more selected from terminals and servers arranged in various places. The radiation exposure dose management system according to claim 1.   Disclosure information for displaying dose information on the radiation inspection apparatus, the image management server, the dose management apparatus and the in-hospital information database server, and the in-hospital information network connected to the in-hospital information database server The radiation dose management system according to any one of claims 1 to 4, wherein a radiation dose information disclosure device having a function is connected. The function for disclosing the exposure dose information is a function for calculating and disclosing the cumulative exposure dose based on the exposure dose data recorded and stored in the personal information database of the in-hospital information database server, the exposure dose irradiated to the specific organ For detecting and disclosing information, function for disclosing a comparison of the cumulative annual exposure dose with the preset annual allowable dose, and a function for issuing a warning when the cumulative dose may exceed the annual allowable dose , Having one or more functions selected from a function of presenting a recommended imaging condition at the time of imaging by the next radiation inspection apparatus based on the accumulated exposure dose and a function of setting the recommended imaging condition in the radiation inspection apparatus The radiation exposure dose management system according to claim 4, wherein the radiation exposure dose management system is a thing.   The image information group composed of various information related to imaging of an image of the body part of the subject stored in an image management server is a tag-format data group based on the DICOM standard. The radiation exposure dose management system according to any one of the above.   A first step of reading an image of the body part of the subject imaged by the radiation examination apparatus and an image information group consisting of various types of information relating to the imaging of the image into the image information group of the image management server; and the read image A program is stored that includes a second step of extracting information necessary for calculating the exposure dose received by the subject from the information group, and a third step of calculating the exposure dose based on the information. A storage medium. A first step of reading an image of the body part of the subject imaged by the radiation examination apparatus and an image information group consisting of various types of information relating to the imaging of the image into the image information group of the image management server; and the read image A second step of extracting information necessary to calculate the exposure dose received by the subject from the information group, a third step of calculating the exposure dose based on the information, the exposure dose, and any The fourth step of calculating the cumulative dose from the information on the dose in the database, the fifth step of disclosing the cumulative dose and the preset annual allowable dose, and the next radiation inspection apparatus And a sixth step of presenting recommended shooting conditions at the time of shooting by the storage medium.

Images