Exposure-dose display device

A workstation 5 links an X-ray image conforming to the Dicom standard and exposure dose data prepared by an exposure measurement system 7 with use of information on the imaging date and time of the X-ray image conforming to the Dicom standard and information on the imaging date and time of the exposure dose data prepared by the exposure measurement system 7. This enables the workstation 5 to calculate an exposure dose corresponding to each X-ray image. Also, the workstation 5 calculates an exposure dose corresponding to each X-ray examination on the basis of data on the start time and end time of the examination received from a console part 1. An examination time and an imaging technique at each examination, data including information on a subject, and information indicating an exposure dose corresponding to the examination are configured as one piece of data and displayed on a display part 51 of the workstation 5.

TECHNICAL FIELD

The present invention relates to an exposure dose display device for displaying an exposure dose of an operator such as an X-ray laboratory technician or a doctor.

BACKGROUND ART

When performing examination or treatment using an X-ray imaging apparatus, it is necessary to take account of not only exposure of a subject but also operator exposure of an operator whose performs such work on a daily basis, such as an X-ray laboratory technician or a doctor. For the operator exposure, it is effective to visualize exposure dose distribution on a dominant hand easily to be exposed, in the vicinity of both eyeballs easily to be damaged by X-rays, or in the vicinity of the thyroid gland.

As a system for displaying such an exposure dose, there has been proposed an exposure measurement system that records an exposure dose measured by a personal dosimeter together with time information. “RaySafe i2” as a real-time exposure measurement system by Toyo Medic Co., Ltd. is configured to include a touch-panel type screen installed in an examination room, and communicate with a personal dosimeter within a communicable range to display a real-time exposure dose. “RaySafe i2” is configured to display a current exposure dose level and an integrated dose value on the touch-panel type screen for each personal dosimeter worn by each operator (see Non-Patent Literatures 1 and 2).

In such an exposure measurement system, information on an exposure dose and information on exposure time at which corresponding exposure is received are generally adapted to be stored in a storage part once and be able to be outputted as tabular data corresponding to general-purpose software.

CITATION LIST

Patent Literatures

SUMMARY OF INVENTION

Technical Problem

As described in Non-Patent Literature 1, there have been proposed some devices adapted to perform monitoring by displaying the integrated value and the like of an exposure dose measured by a personal dosimeter; however, it has not been possible to recognize which X-ray examination each exposure is made at. If it becomes possible to visualize information on which X-ray examination an exposure is made at, it is expected to be able to reduce an exposure dose by improving operations or the like at each examination.

The present invention has been made in order to solve the above-described problem, and intends to provide an exposure dose display device capable of displaying an exposure dose corresponding to each X-ray examination.

Solution to Problem

A first aspect of the present invention includes: an exposure dose data storage part that stores exposure dose data indicating the relationship between exposure dose information and exposure time information; an X-ray image storage part that, together with imaging time information given to an X-ray image, stores the X-ray image imaged by an X-ray imaging apparatus when performing an X-ray examination; an information linking part that links the exposure dose data stored in the exposure dose data storage part and the X-ray image stored in the X-ray image storage part with use of the exposure time information and the imaging time information; and an exposure dose display part that, on the basis of the exposure dose data and the X-ray image that are linked by the information linking part, displays the exposure dose corresponding to the X-ray examination or the exposure dose corresponding to the X-ray image at the X-ray examination.

A second aspect of the present invention is the first aspect of the present invention in which the exposure dose data indicating the relationship between the exposure dose information and the exposure time information is prepared by an exposure measurement system that records an exposure dose measured by a personal dosimeter together with time information.

Advantageous Effects of Invention

According to the first aspect of the present invention, an exposure dose corresponding to each X-ray examination or each X-ray image can be displayed by linking exposure dose data and an X-ray image with use of exposure time information and imaging time information. In doing so, it is possible to visualize information on which X-ray examination or X-ray image acquisition an exposure is made at, and therefore an exposure dose can be reduced by improving operations or the like at each examination.

According to the second aspect of the present invention, an exposure dose corresponding to each X-ray examination or each X-ray image can be easily displayed by directly using exposure dose data prepared by the exposure measurement system that records an exposure dose measured by a personal dosimeter together with time information.

DESCRIPTION OF EMBODIMENTS

In the following, an embodiment of the present invention will be described on the basis of the drawings.FIG. 1is a schematic diagram of an X-ray imaging apparatus used for the exposure dose display device according to the present invention.

The X-ray imaging apparatus includes: a console part1and a high voltage device2that are installed in an operation room101for an operator to perform X-ray imaging operations; and an examination table3and an imaging part4that are installed in an imaging room100for performing imaging on a subject20. The imaging room100and the operation room101are blocked by a partition wall102.

The console part1installed in the operation room101includes a display part11configured of a liquid crystal display and the like and an operation part12configured of a keyboard, a mouse, and the like for performing various types of operations, and is one for performing the various types of operations for performing X-ray imaging. In addition, the high voltage device2disposed on the partition wall102in the operation room101includes an operation panel having: a display part configured of a touch panel type liquid crystal display and the like; and various types of input buttons, and a push button switch for starting X-ray irradiation. The high voltage device2is one for setting the tube voltage and tube current of the below-described X-ray tube42or X-ray irradiation conditions such as an X-ray irradiation time.

The examination table3installed in the imaging room100includes: a top board31on which the subject20is placed; an X-ray detection part33containing inside a flat panel detector (FPD) as an X-ray detector; and a lifting/lowering part34for lifting/lowering the top board31and the X-ray detection part33. The X-ray detection part33is adapted to be horizontally movable in the left-right direction inFIG. 1. Also, the X-ray detection part33is adapted to be liftable/lowerable in the up-down direction inFIG. 1together with the top board31. Further, the imaging part4installed in the imaging room100includes: a base part61that is movable in two directions mutually orthogonal with respect to the ceiling of the imaging room100; a support part62extending downward from the base part61; a movement part63that lifts/lowers and rotationally moves with respect to the support part62; and a handle41, the X-ray tube42, and a collimator43integrally supported by the lower end part of the movement part63.

X-rays radiated from the X-ray tube42onto the subject20via the collimator43are detected by the X-ray detection part33. An X-ray image detected by the X-ray detection part33is transmitted to the below-described workstation5and server6via the console part1. At this time, the start time and end time of the examination are transmitted together with the X-ray image.

FIG. 2is a block diagram illustrating the configuration of the exposure dose display device according to the present invention.

As described above, the console part1illustrated inFIG. 1is connected to the workstation5and transmits an X-ray image to the workstation5. The X-ray image is an image conforming to the Dicom standard. Note that Dicom stands for Digital Imaging and COmmunications in Medicine, and refers to a standard that defines the format of medical images imaged by CT, MRI, CR, and the like, which was developed by American College of Radiology (ACR) and National Electrical Manufacturers Association (NEMA), and a communication protocol between medical imaging equipment that handles such images.

The workstation5transmits the X-ray image and other pieces of data to the server6. The server6is connected to multiple workstations5installed in a hospital, and used to store various types of images imaged in the hospital. Also, the workstation5is connected to the exposure measurement system7that records an exposure dose measured by a personal dosimeter8worn by an operator together with time information. For example, as disclosed in Non-Patent Literature 1, the exposure measurement system7includes a touch panel type screen and the like installed in the imaging room100, and is configured to communicate with a personal dosimeter8within a communicable range to display a real-time exposure dose and also store the exposure dose. In addition, a personal dosimeter8is mounted by an operator constantly on his/her clothing or the like, and constantly measures an exposure dose at the time of daily examination or treatment.

FIG. 3is a schematic diagram illustrating the structure of an X-ray image that is prepared by the console part1in the X-ray imaging apparatus and conforms to the Dicom standard, and the structure of exposure dose data prepared by the exposure measurement system7.

The X-ray image confirming to the Dicom standard consists of: an information area in which various types of information are recorded, such as an imaging date and time, a patient name, and imaging conditions; and an image area in which an image is recorded. On the other hand, the exposure dose data prepared by the exposure measurement system7is structured to link the imaging date and time and an exposure dose at the time. The workstation5illustrated inFIG. 3links the X-ray image conforming to the Dicom standard and the exposure dose data prepared by the exposure measurement system7with use of the information on the imaging date and time in the X-ray image conforming to the Dicom standard and the information on the imaging date and time in the exposure dose data prepared by the exposure measurement system7. In addition, the workstation5calculates an exposure dose corresponding to each X-ray image. Also, the workstation5calculates an exposure dose corresponding to each X-ray examination on the basis of data on the start time and end time of the examination received from the console part1. The workstation5functions as an information linking part according to the present invention.

FIG. 4is a schematic diagram illustrating data on an exposure dose corresponding to each X-ray examination prepared by the workstation5.

As illustrated in this diagram, an examination time and an imaging technique at each examination, data including information on a subject20, and information indicating an exposure dose corresponding to the examination are configured as one piece of data. This data is displayed on a display part51of the workstation5. In addition, this data may be adapted to be displayed on the display part11of the console part1and/or on a display part71of the exposure measurement system7as well.

Further, this data may be adapted to be displayed by being printed out, instead of being displayed on the display part51of the workstation5, the display part11of the console part1, or the display part71of the exposure measurement system7. The term “display” in this specification is a concept including such a form.

This enables operators and third persons to grasp an exposure dose of each operator corresponding to each X-ray examination. For this reason, it becomes possible to visualize information on which X-ray examination an exposure is made at and reduce an exposure dose by improving operations or the like at each examination.

In addition, as shown inFIG. 4, instead of displaying data on an exposure dose corresponding to each X-ray examination, it may be adapted to individually display data on an exposure dose corresponding to each X-ray image. In this case, it becomes possible to visualize information on what kind of X-ray imaging an exposure is made at.

REFERENCE SIGNS LIST