JPH09298099A - Fluoroscopic photography device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To read each real exposure data (exposure history) in a series of radiography at a stage where the series of radiography to a sample is completed. SOLUTION: A device is composed in such a way that both fluoroscopy to a sample M on a top plate 3 by an image intensifier 6 and a series of continuous radiography by a fast photographer 7 can be performed in accordance with exposure to X-ray from an X-ray tube 5. In this case, all the real exposure data related to each exposure to X-ray in the series of radiography is memorized by a real exposure data memory 22, and the real exposure data for each exposure to X-ray memorized in the real exposure data memory 22 is displayed in an exposure data display part 23, where each real exposure data can be read at a stage where radiography is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical X-ray fluoroscopy apparatus which is configured to perform X-ray fluoroscopy of a subject and a continuous series of X-rays of the subject, and in particular, The present invention relates to a technique for displaying actual exposure data of a subject in a series of X-ray photography.

[0002]

2. Description of the Related Art An X-ray fluoroscopy apparatus used in a medical field such as a hospital is such that an X-ray tube and a fluoroscopic image intensifier are arranged so as to face each other with a top plate in between, and a film. A camera is placed on the back side of the top plate,
With X-ray irradiation performed by applying a high voltage to the X-ray tube,
Patient X on the tabletop with image intensifier
It is configured to provide both fluoroscopy and a continuous series of radiographs of the patient on the top with a film camera. Usually, while determining an appropriate imaging region by fluoroscopy of the patient, X-ray exposure is performed on each determined imaging region according to a predetermined tube voltage / tube current condition, and an image is taken by a film camera X The radiographic operation is repeatedly performed, and a series of X-ray imaging is performed.

Further, in the case of the conventional X-ray fluoroscopic imaging apparatus,
At the end of each X-ray exposure for a series of X-ray photography, the actual tube voltage / tube current data and exposure time data necessary to know the amount of X-rays exposed to the patient are obtained. Checked by an engineer (or doctor). And finally, since it is necessary to manage the X-ray dose (X-ray exposure dose) that the patient received by X-ray photography, the actual tube voltage / tube current and exposure time must be recorded in the medical record. become.

[0004]

However, it is a troublesome work for an X-ray technician who performs fluoroscopic imaging of a patient to check the actual exposure data once for each X-ray exposure. The tube voltage and tube current data of the X-ray tube is not much different from the preset values (set values), but the exposure time data is the thickness of the patient's imaging site and the patient's body (thick).
It changes depending on the degree, etc., so it is necessary to check the actual data each time a picture is taken. Therefore, the work of checking the actual exposure data puts a considerable burden on the X-ray technician.

In the conventional X-ray fluoroscopic apparatus, is it possible to switch the display of predetermined tube voltage / tube current conditions to the display of actual exposure data each time X-ray exposure is executed,
Alternatively, although the actual exposure data is displayed on a separately provided display, the previous actual exposure data is erased with the execution of the next X-ray exposure. Therefore, if it is attempted to check before each actual exposure data is erased, the actual exposure data will inevitably be checked at each X-ray exposure.

In view of the above-mentioned problems, the present invention is an X-ray fluoroscope capable of browsing each actual exposure data (exposure history) in a series of X-ray photography at the stage when a series of X-ray photography for an object is completed. An object is to provide an imaging device.

[0007]

The present invention has the following constitution in order to achieve the above object. That is, in the X-ray fluoroscopic imaging apparatus according to the present invention, the X-ray tube and the fluoroscopic image intensifier are arranged so as to face each other with the top plate interposed therebetween, while the film imaging device is arranged on the back side of the top plate. With the X-ray irradiation from the X-ray tube, X-ray fluoroscopy of the subject on the top plate by the image intensifier and continuation of the subject on the top plate by the film camera. In an X-ray fluoroscopic imaging apparatus configured to perform a series of X-ray photography, the actual tube voltage / current and exposure of the X-ray tube relating to each X-ray exposure in the series of X-ray photography. Actual exposure data measuring means for measuring time, actual exposure data storage means for storing the actual exposure data, and actual exposure data for each X-ray exposure stored in the actual exposure data storage means Actual exposure data output to read and output It is obtained by a means.

[0008]

The operation of browsing the actual exposure data in the X-ray fluoroscopic imaging apparatus of the present invention is as follows. First, the subject is placed on the top plate of the X-ray fluoroscopic imaging apparatus, and appropriate radiographed regions are sequentially determined by X-ray fluoroscopy of the subject by the image intensifier. Simultaneously with the X-ray exposure by the X-ray tube, the film photographing device performs photographing, and a series of X-ray photographing is executed. On the other hand, the actual tube voltage, tube current, and exposure time of the X-ray tube for each X-ray exposure are measured while the series of X-ray imaging progresses in this way, and these actual exposure data are actually exposed. It is stored in the data storage means one by one. Then, even at the stage where a series of X-ray imaging has been completed, the X-ray technician (or doctor) reads each actual exposure data read out and output by the actual exposure data output means of the X-ray fluoroscopic imaging apparatus. You can check all actual exposure data by looking at.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a cassette radiography apparatus according to the embodiment. FIG. 2 is a partial external view showing the periphery of the apparatus main body provided with the X-ray tube, the image intensifier, the top plate and the like of the apparatus of the embodiment.

In the cassette radios X-ray fluoroscopic apparatus of the embodiment, the tilting and rotating frame 2 is supported on the floor 1 so as to be rotatable below, as indicated by an arrow A in FIG. 2 (a). On the other hand, a top plate 3 on which the subject M is laid down is arranged above the tilting rotation frame 2 so as to be movable in the longitudinal direction, as indicated by an arrow B in FIG. . It is also possible to erect the top plate 3 until the top plate 3 is substantially vertical to the floor 1.

An X-ray tube 5 is attached to the tip of a supporting frame 4 provided upright on the rear side of the tilting rotary frame 2 so as to face the upper surface of the top plate 3 from above, while the tilting rotary frame 2 is mounted. An image intensifier 6 for X-ray fluoroscopy is disposed below the top plate 3 in the position facing the X-ray tube 5. The X-ray tube 5 and the image intensifier 6 are configured so that the image intensifier 6 also tilts in conjunction with the tilting of the X-ray tube 5 so that the facing arrangement relationship between them is always maintained. Further, on the lower side of the top plate 3 of the tilting and rotating frame 2, a quick-shooting photographing device 7 (for X-ray photographing) for photographing a transmission X-ray image of the subject M on a film is installed.

When X-ray fluoroscopy is performed by the apparatus of the embodiment, control is performed through the controller 9 and the top plate drive unit 10 according to the operation from the console 8 while the subject M is placed on the top plate 3. Accordingly, the tilting and rotating frame 2 is rotated to stand the top plate 3 together with other objects, or the top plate 3 is horizontally moved to position the subject M, while the X-ray tube 5 is moved. The subject M that is operated and placed on the top plate 3.
Is exposed to X-rays. The detection signal output from the image intensifier 6 in association with X-ray irradiation is converted into an electric signal by the television camera 11, and then sent to the television monitor 13 via the image processing unit 12 that performs signal amplification and the like.
As a result, the subject M is displayed on the screen of the television monitor 13.
The X-ray fluoroscopic image will be displayed.

Then, after the imaged region is positioned on the basis of the observation result of the X-ray fluoroscopic image on the screen of the television monitor 13, the controller 9 and the controller 9 are set in accordance with the exposure conditions preset by the operator console 8. The control is performed via the high-voltage generation unit moving unit 14, so that the X-ray tube 5 irradiates the subject M with X-rays, and at the same time, the controller 9 and the imaging drive unit are also in accordance with the imaging command from the console 8. When the control is performed via 15, the quick-shooting photographing device 7 operates and photographing by the film is sequentially performed,
A series of X-ray photography is executed.

The number of images (also the number of times of X-ray exposure) in a series of X-ray images varies depending on the region to be imaged and the medical condition, such as several to ten or more or more.

Next, the structure relating to the exposure data, which is a feature of the present invention, will be described. The exposure condition data preset by operation from the console 8 includes at least the tube voltage / tube current of the X-ray tube and the exposure time. Tube voltage / tube current and exposure time are essential data. Further, other data such as the size of the film used and patient identification data (name, ID number, etc.) may be added to these essential data.

Although the exposure time is tentatively set, the actual exposure time is usually adjusted to the sensitivity of the film to be used, because it is usually related to the imaging site and the physical condition of the subject M. The normal condition is that it is determined by the function of the automatic exposure function. However, since X-ray exposure is not performed for longer than the set exposure time, the preliminary setting of the exposure time results in a safety measure in the event of an abnormal situation due to deficiency (failure) such as the automatic exposure function. It can be said that it fulfills such a role (backup function).

The exposure condition data input from the console 8 is stored in the exposure condition memory 21 via the controller 9, and the stored exposure condition memory 21 is read by the controller 9 to As shown in FIG. 3, it is configured to be displayed in the exposure condition data display field 24 in the exposure data display unit 23. This exposure data display unit 23
May be installed independently, but may be installed in a part of the operation console 8 or may be installed in a part of the display screen of the TV monitor 13 so as to be convenient.

On the other hand, as the actual exposure data regarding each X-ray exposure in a series of X-ray photography, at least X
There is the actual tube voltage / tube current and the actual exposure time of the wire tube. That is, the measured tube voltage, the measured tube current, and the measured exposure time are essential actual exposure data. In addition to these indispensable actual exposure data, other data such as the size of the used film and patient identification data (name, ID number, etc.) may be added.

The actually measured tube voltage and the actually measured tube current of the X-ray tube 5 at the time of exposure are grasped by the controller 9 by the tube voltage / current signal which is detected and fed back by the high voltage generating unit 14 by the voltage dividing resistor or the like. Actual exposure data memory 22
The data is sent to and stored in the exposure data display section 23 in the exposure data display section 23 as shown in FIG.

Regarding the actual exposure time, the time from the start of exposure to the reception of the photographing stop signal output from the automatic exposure drive section 16 described below is measured by the internal timer function of the controller 9, and this is set. The actual exposure time is sent to and stored in the actual exposure data memory 22 as shown in FIG.
As shown in FIG. 5, the actual exposure data display field 25 in the exposure data display unit 23 is configured to display the measured tube voltage and the measured tube current in the order of exposure.

FIG. 4 shows a specific configuration example of the automatic exposure drive unit 16 which sends a photographing stop signal necessary for measuring the actual exposure time. As shown in FIG. 4, in the automatic exposure drive unit 16, a part of the output light of the image intensifier 6 is included in the light distributor 31.
After being detected and amplified by a photodetector 32 (such as a photomultiplier tube) via, a capacitor 33 integrates. The integral output of the condenser 33 and the film required exposure amount setting unit 34
Is compared with the setting signal of. Capacitor 3
When the integrated output of 3 reaches the setting signal of the required exposure amount setting unit 34, the photographing stop signal is sent from the comparator 35 to the controller 9. Of course, the controller 9 receiving the imaging stop signal immediately stops the voltage supply to the X-ray tube 5, and the X-ray irradiation is stopped.

The actual exposure data display field 25 in the exposure data display section 23 is constructed so that the actual exposure data of n times (a plurality of times) of X-ray exposure can be displayed for each exposure. There is. If the actual exposure data display column 25 has a number (about 10 to 15) enough to cover the number of exposures of a normal series of X-ray imaging (for example, about 10 to 15 times can be displayed), For X-ray photography, the exposure history can be seen at a glance, which is extremely convenient. When the number of times of a series of X-ray imaging exceeds n times, the old actual exposure data in the actual exposure data display field 25 are deleted in order and replaced with new actual exposure data. However, the actual exposure data display column 25
The actual exposure data to be deleted is also the actual exposure data memory 2
It is recorded in No. 2 and can be displayed again in the actual exposure data display field 25 by an instruction from the operation console 8 as needed.

From the above, in this embodiment, the actual exposure data measuring means includes the controller 9 and the high voltage generator 14.
And a part of the automatic exposure drive unit 16 and the like.
The actual exposure data output means is composed of the exposure data display unit 23.

Next, the operation of the X-ray fluoroscopic imaging apparatus of the embodiment having the above-described structure will be concretely described. First, a patient as the subject M is placed on the top plate 3, and then the top plate 3 is moved to an appropriate position while the subject M is placed according to an instruction given from the operation console 8. Hereinafter, description will be given with reference to the flowchart shown in FIG.

[Step S1] The exposure condition of the X-ray tube is input from the operator console 8 as required. The input exposure condition is stored in the exposure condition memory 21 and is appropriately displayed in the exposure condition data display field 24 in the exposure data display unit 23.

[Step S2] The first imaging region of the subject M is accurately positioned below the X-ray tube 5 while performing X-ray fluoroscopy by the image intensifier 6.

[Step S3] When an instruction for X-ray exposure and an instruction for film photographing are given by the operation from the console 8, the high voltage generator 14 and the cassette telephotographing device 7 are actuated and the X of the first photographing portion is taken. The line is photographed. With the execution of the first X-ray imaging, the measured tube voltage, the measured tube voltage, and the measured exposure time data are measured and stored in the actual exposure data memory 22. The first actual exposure data is displayed in the actual exposure data display field 25 in the exposure data display unit 23.

[Step S4] If there is a part for X-ray imaging, the above steps S2 and S3 are repeated and the X-ray imaging is successively executed. However, if there is no region for X-ray imaging, the process proceeds to the next step S5.

[Step S5] Since the series of X-ray imaging is completed, the top 3 is moved to return the subject M to the original standby position.

[Step S6] An X-ray technician or a doctor checks the actual exposure data in each series of X-ray images displayed in the actual exposure data display field 25, and records the X-ray exposure dose as a record. Record necessary data in medical records. As described above, in the case of the present invention, it is sufficient to collectively record the X-ray exposure amount at the stage when a series of X-ray imaging is completed, and until then, the X-ray technician can concentrate only on the X-ray imaging. is there.

The present invention is not limited to the above embodiment, but can be modified as follows, for example. (1) In the above embodiment, the actual exposure data display column 25 has n
Although it was provided, the number of the actual exposure data display column 25 is 1
The configuration of only one can be mentioned as another embodiment. When the number of the actual exposure data display column 25 is one, after the completion of the X-ray imaging, the actual exposure data of the series of X-ray imaging is sequentially drawn out one by one from the actual exposure data memory 22 and switched and displayed. While checking it, I will be checking. Further, the exposure condition data display column 24 is also used for displaying the actual exposure data without providing a column dedicated to the actual exposure data display. A configuration in which each piece of actual exposure data of a series of X-ray images is sequentially extracted and switched to be displayed can also be cited as another embodiment that exerts the effect of the present invention.

(2) The actual exposure data may be output by the printer 26, as indicated by the alternate long and short dash line in FIG. It will be possible for the printer 26 to record the actual exposure data by sticking the piece of paper on which the actual exposure data has been printed.

[0033]

According to the X-ray fluoroscopic imaging apparatus of the present invention,
Since the actual tube voltage / tube current and exposure time of the X-ray tube relating to each X-ray exposure are stored and held as actual exposure data one by one in the actual exposure data storage means, one X-ray is performed. It is not necessary to check the actual exposure data every time the exposure is completed, and it becomes possible to browse and check all the actual exposure data at the stage when a series of X-ray imaging for the subject is completed. Since it is possible to concentrate only on the X-ray imaging until the series of X-ray imaging ends, the X-ray imaging can be accurately performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an X-ray fluoroscopic apparatus according to an embodiment.

FIG. 2 is a partial external view showing the periphery of the main body of the apparatus of the embodiment.

FIG. 3 is a plan view showing an exposure data display unit in the apparatus of the embodiment.

FIG. 4 is a block diagram showing a specific configuration example of an automatic exposure drive unit in the apparatus of the embodiment.

FIG. 5 is a flowchart showing a flow of operations at the time of X-ray imaging by the apparatus of the embodiment.

[Explanation of symbols]

 3 ... Top plate 5 ... X-ray tube 6 ... Image intensifier 7 ... Quick-shooting device 8 ... Operator console 9 ... Controller 14 ... High-voltage generator 15 ... Shooting drive unit 16 ... Automatic exposure drive unit 22 ... Actual exposure data Memory 23 ... Exposure data display unit 25 ... Actual exposure data display column 26 ... Printer

Claims (1)

[Claims] 1. An X-ray tube and a see-through image intensifier are arranged so as to face each other with a top plate sandwiched therebetween, while a film camera is arranged on the back side of the top plate. X-ray exposure of the subject on the top plate by the image intensifier, and a continuous series of radiographs of the subject on the top plate by the film camera. In an X-ray fluoroscopic imaging apparatus configured to perform each of the above, the actual exposure data for measuring the actual tube voltage / tube current and exposure time of the X-ray tube regarding each X-ray exposure in the series of X-ray imaging Measuring means, actual exposure data storage means for storing the actual exposure data, and actual exposure for reading and outputting the actual exposure data for each X-ray exposure stored in the actual exposure data storage means. And a data output means. X-ray fluoroscope.