JPS6292660A - Auxiliary device for radiographing - Google Patents

Abstract

PURPOSE:To enable even a person who is strange to radiographing to radiograph correctly by using a storage means where information concerning diagnostic positions, symptoms, etc. and radiographic conditions adapted to individual object information are allowed to correspond to each other and are stored. CONSTITUTION:An auxiliary device 20 for radiographing applied to a radiographing device 10 consists of a central processing unit 21 as a retrieving means, a keyboard 23, and a CRT 24. Before radiographing, the keyboard 23 is operated to input object information such as a diagnostic position and symptoms to the central processing unit 21. Radiographic conditions (the position and the attitude of the object, the voltage of an X-ray tube, the size of a storage type phosphor sheet 14, etc.) adapted to the diagnostic position and symptoms of the object 11 to be radiographed are displayed on the CRT 24, and the device operator sets optimum photographic conditions in accordance with this display to radiograph correctly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention provides a fIl! system that enables even those who are inexperienced in radiographic imaging to optimally set various imaging conditions and perform appropriate radiographic imaging. )! This relates to a line image 1lil shadow assisting device.

(Technical Background and Prior Art of the Invention) Conventionally, in the medical field, etc., radiation tJJ rays such as X-rays that have passed through a subject have been irradiated onto a 1-ray film to record a transmitted radiation image of the subject on the film. Radiographic imaging systems are widely used.

When performing radiographic modeling using such a radiographic imaging system, for example, in medical diagnostic imaging, a radiation dramatist will make adjustments to the subject's image at the time of imaging, depending on the diagnostic site and symptoms of the subject. Various imaging conditions were determined, including body position, posture, radiation tube position, radiation tube voltage, radiation dose, radiation field, and film size. The determination of such imaging conditions is made based on the accumulated experience rules or by taking into account the experience of radiology technicians. It has been extremely difficult for a person to optimally set the above-mentioned conditions and perform appropriate radiological image flit shadowing.

Therefore, conventionally, M
A radiation image imitation system that automatically determines the radiation tube voltage and exposure radiation dose has also been proposed.

However, such systems control the operation of the radiation source, and the imaging conditions, such as the subject's body position, posture, and radiation tube position, cannot be optimally set unless one is an expert in radiation image imitation. Can not. In other words, although the above system can reduce the burden on those who are experts in radiographic imaging equipment, it has not been able to enable those who are inexperienced in radiographic imaging to properly transport images. .

For example, JP-A-55-12429@, JP-A-55-116
340M, No. 55-163472, No. 56-1139
As shown in No. 5, No. 56-104645, etc.
1j) Accumulating and recording the radiation image of the subject on a stimulable phosphor sheet instead of the l-ray film, scanning this sheet with excitation light to cause stimulated luminescence, and reading this stimulated luminescent light photoelectrically. A method has been proposed in which an image signal is obtained from a radiograph, and this image signal is processed to obtain a radiation image of a subject that is suitable for diagnosis. The above-mentioned stimulable phosphor sheet refers to a stimulable phosphor sheet in which radiation such as X-rays, α-rays, β-rays, γ-rays, ultraviolet rays, and electron beams is applied to a sheet-like support. This sheet is formed by forming a phosphor 1 that accumulates the energy of this radiation when irradiated with it, and then exhibits stimulated luminescence according to the accumulated radiation energy when it is irradiated with excitation light such as visible light. In radiographic imaging using the above-mentioned stimulable phosphor sheet, in addition to the various imaging conditions mentioned above, new imaging conditions such as the stimulable phosphor sheet sensitivity must also be set appropriately. Even those who are well-versed in radiography using conventional radiation film may not be able to properly set all of the various imaging conditions.

(Purpose of the Invention) The present invention has been made in view of the above circumstances, and enables even a person who is not familiar with radiographic image modeling to optimally set various vR shadow conditions and perform appropriate imaging. The object of the present invention is to provide a radiographic image imitation auxiliary device that enables the following.

(Structure of the Invention) The radiographic image copying auxiliary device of the present invention is a radiographic image shaping system that records a radiographic image of a subject under ti'i copper wire image capturing conditions such as the above-mentioned radiographic film or stimulable phosphor sheet. a storage means that stores a plurality of pieces of subject information regarding the subject, that is, information about the diagnosed parts, symptoms, etc., and radiography conditions suitable for each piece of subject information; and an input means that inputs the subject information; A search means receives subject information from the input means and reads @shadow conditions corresponding to this information from the storage means, and a display means receives the output of the search means and displays the read photographing conditions. It is what it is.

(Embodiments) Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows a radiation image copying assisting device according to a first embodiment of the present invention. This radiographic image copying auxiliary device 20 is applied, as an example, to the radiographic image capturing apparatus 10 that accumulates and records radiographic images on the stimulable phosphor sheet b as described above. The imaging device 10 includes an imaging table 12 on which a diagnostic region (imaging region) of a subject (examiner) 11 is placed, an X-ray tube 13 as a radiation source, and a stimulable phosphor sheet 14. X-ray tube 13 with the imaging table 12 in between
It has a sheet holding part 15 that holds the sheet so as to face it. Further, a diaphragm 16 for comparing the X-ray field is arranged between the X-ray tube 13 and the imaging table 12.

In the radiation image capturing apparatus 10 configured as described above, the subject 1
1 is placed on the imaging table 12, the X-ray tube 13 is activated, and radiation (in this case, X-rays) 1 is directed toward the imaging table 12.
7, the energy of the radiation 17 transmitted through the subject 11 is accumulated in the stimulable phosphor sheet 14, and a transmitted radiation image of the subject 11 is recorded on the sheet 14.

The stimulable phosphor sheet 14 on which the radiation image has been stored and recorded in this way is subjected to an image reading device (not shown), where the excitation light is illuminated as described above.Thereby, the stimulated luminescence emitted from the sheet 14 Since the light is detected photoelectrically and an image signal representing the radiation image is obtained, this image signal can be input to, for example, an optical scanning recording device or a CRT display device to reproduce the radiation image.

The radiographic imaging auxiliary device 20 applied to the above-mentioned radiographic imaging device 10 includes, for example, a computer system, and includes a central processing unit 21 as a search means, and a magnetic tape connected to the central processing unit 21, for example. It is composed of an external storage device 22 using a magnetic drum or the like, a keyboard 23 as an input means, and a CRT 24 as a display means. The storage device 22 stores a plurality of pieces of subject information such as the diagnosis site and symptoms described above, as well as the body position and posture of the subject 11 suitable for each piece of subject information, the position of the X-ray tube 13, tube voltage, and radiation exposure. The radiation dose, radiation irradiation field, size of the stimulable phosphor sheet 14, and imaging conditions such as sensitivity are stored in association with each other. Note that as mentioned above, the storage device 2
The database stored in No. 2 is constructed based on empirical rules regarding shadows and shadows in radiographic images.

As described above, before radiography is performed in the radiographic image capturing apparatus 10, the keyboard 23 is operated to input subject information such as the above-mentioned diagnostic site and symptoms to the central processing unit 21. When the central processing unit @ 21 receives this subject information, it searches for the photographing conditions stored in the memory bag @ 22 in association with the subject information, and uses the retrieved Zuisho conditions in the CR.
Display it on T24.

Therefore, this CRT 24 will have a radiographic image f!
j! Imaging conditions suitable for the diagnostic region and symptoms of the subject 11 where the tJ shadow is to be taken (i.e., the subject's region, posture, X-ray tube voltage, size of the stimulable phosphor sheet 14, etc.) are displayed, allowing you to operate the imaging device. The operator can optimally set each imaging condition according to this display and perform appropriate radiographic imaging.

In the embodiment described above, only the shooting conditions are displayed, and each W&A condition is set manually. However, for shooting conditions that can be set automatically, the search results of the central processing unit 21 It is also possible to automatically set based on

FIG. 2 shows a second embodiment of the invention so constructed. Note that in FIG. 2, elements that are equivalent to those in FIG. 1 are given the same numbers, and explanations thereof will be omitted. The radiation image imitation assisting device 40 shown in FIG. Among the dark shadow conditions searched for, information S1 regarding the X-ray tube voltage and the exposure radiation dose is input. X-ray tube controller 41
receives this information S1 and sends a drive signal S2 corresponding to the information S1 to the X-ray tube 13. Thereby, the tube voltage and exposure radiation dose of the X-ray tube 13 are automatically set to appropriate values found by the central processing unit 21.

It should be noted that when some of the photographing conditions are automatically set as in the embodiment shown in FIG. Since dark and shadow conditions can be confirmed, it is preferable to also display the information.

Furthermore, the imaging conditions that can be automatically set are not limited to the above-mentioned X-ray tube voltage and exposure radiation dose; for example, the X-ray tube 13
It is of course possible to automatically set the X-ray tube position and the irradiation field by using a device that moves the position of the X-ray tube and drives the irradiation field aperture 16. In addition, many types of stimulable phosphor sheets 14 are available.
It is also possible to automatically set the type (size, sensitivity, etc.) of the sheet 14 to be used by using a sheet changer that stores the sheets 14 and selects any one of the sheets 14 and supplies it to the i-position. Become.

Although the actual FM LQ applied to the taaki system that uses a stimulable phosphor sheet as a radiation image capturing condition has been described above, the radiation image imitation assisting device of the present invention can also be used with other radiation sources such as X-ray film. The present invention is similarly applicable to a shadow system using image capturing conditions.

(Effects of the Invention) As explained above in detail, according to the radiographic imaging auxiliary device of the present invention, even a person inexperienced in radiography can perform radiographic imaging 11 appropriately in the same way as a skilled radiographic 11 shadowing operator. be able to. Therefore, according to the radiographic imaging auxiliary device of the present invention, radiographic images with excellent diagnostic performance can be obtained even in a medical practitioner, a clinic in a remote area, a ship, etc., where a radiographer cannot be stationed.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are schematic diagrams showing the configuration of a radiation image 11 imaging assistance system according to the first and second embodiments of the present invention, respectively. 10... Radiographic imaging device 11... Subject 12
...Photographing table 13...X-ray tube 14...
・Storage phosphor sheet 16...Irradiation field aperture 17...
・Radiation 20.40...Radiation imaging auxiliary device 21...Central processing unit 22...Storage device 2
3...Keyboard 24...CRT41・
・・X-ray tube controller

Claims (1)

[Scope of Claims] A radiographic image capturing system that records a radiographic image of the subject on the recording medium by irradiating a radiographic image recording medium with radiation that has passed through the subject; a storage means that stores radiographic imaging conditions suitable for the image in association with each other; an input means for inputting the subject information; and receiving subject information from the input means and reading imaging conditions corresponding to this information from the storage means. A radiographic imaging auxiliary device comprising: a search means; and a display means for receiving the output of the search means and displaying the read imaging conditions.