JP4863845B2 - X-ray diagnostic imaging equipment - Google Patents

Description

  The present invention relates to an X-ray diagnostic imaging apparatus in which an X-ray fluoroscopic image obtained when X-rayed through a subject can be recorded and reproduced on a recording means.

Conventionally, as this type of X-ray diagnostic imaging apparatus, for example, one described in Patent Document 1 is known.
The X-ray diagnostic imaging apparatus described in Patent Document 1 receives a video signal output from a television camera that scans a visible light image converted by an X-ray detector, and records a fluoroscopic image for a preset time. And an external recording device connected to the image recording unit, and a fluoroscopic image immediately before shooting recorded in the image recording unit by a shooting start signal output from the shooting control unit at the start of shooting Can be read out and recorded on an external recording device.
In addition, with the above-described configuration, only the fluoroscopic image in which the necessary information such as the lesioned part is recorded immediately before the subject is photographed after the confirmation of the imaging target region and the lesioned part can be recorded in the external recording device. It has become.

On the other hand, the X-ray diagnostic imaging apparatus described in Patent Document 1 has a fluoroscopic function in addition to X-ray imaging.
This fluoroscopy is an act of irradiating a subject with X-rays to confirm the subject's imaging target region and the presence / absence of a lesion site. Are distinguished.
In addition, there is a demand for storing a fluoroscopic image as a record in order to more surely confirm the presence or absence of a lesion site. Conventionally, the fluoroscopic image is recorded on a recording medium such as a VTR or a DVD as an analog signal. However, in order to search for necessary information such as a lesion from a recording medium recorded with an analog signal, it is necessary to reproduce the entire recording medium and search for a necessary X-ray fluoroscopic image. There are problems such as long observation time and poor work efficiency.
In order to improve such a problem, in Patent Document 1, an analog signal (video signal) obtained by a television camera is converted into a digital signal and recorded in an image recording unit. An X-ray fluoroscopic image immediately before photographing recorded in the image recording unit is read and recorded in an external recording device connected in advance.
JP-A-6-86776

However, as in the X-ray image diagnostic apparatus described in Patent Document 1, an analog signal is converted into a digital signal, recorded in a temporary image recording unit, and recorded in an external recording device at the start of imaging. There is a problem like this.
That is, an image recording unit that temporarily records a fluoroscopic image as a digital signal usually uses a recording unit such as a semiconductor memory or an HDD (hard disk), and has a limited capacity for recording an X-ray fluoroscopic image.
For this reason, when the X-ray fluoroscopic image to be recorded reaches the upper limit of the recording capacity, the recording is stopped, or the process of overwriting the new X-ray fluoroscopic image by erasing in order from the oldest X-ray fluoroscopic image already recorded. Is going.
However, since the recording capacity of the image recording unit has reached the upper limit, in the conventional recording method in which the subsequent recording is stopped or the old X-ray fluoroscopic image is overwritten with the new X-ray fluoroscopic image, the operator of the X-ray diagnostic imaging apparatus It is impossible to grasp in real time whether or not X-ray fluoroscopic images after the time point remain in the image recording unit.
For this reason, if fluoroscopy of the subject is continued for a long time, it will be known later that there is no X-ray fluoroscopic image of the object of interest that was thought to be recorded, which hinders confirmation of the presence or absence of a lesion site. There is a problem such as coming.
Further, when the subject is to be seen again with X-rays for confirming the lesion site, there is a problem that the amount of X-ray exposure to the subject increases more than necessary.
The present invention has been made to ameliorate such a problem, and X-ray image diagnosis is made to display an X-ray fluoroscopic image on the display means before the X-ray fluoroscopic image recorded on the temporary recording means is erased. An object of the present invention is to provide an apparatus to prevent the fluoroscopic image from disappearing against the will of the operator.

The present invention includes an X-ray source that irradiates a subject with X-rays, an imaging unit that is disposed to face the X-ray source and that captures an X-ray fluoroscopic image of the subject from X-rays that have passed through the subject; Recording means for recording image data of the X-ray fluoroscopic image captured by the imaging means in a recording area, which is connected to the imaging means so as to be able to perform data communication, and the X-ray fluoroscopic image captured by the imaging means In the X-ray image diagnostic apparatus comprising the first display means for displaying, the first display means obtains the X-ray fluoroscopic images recorded in the recording area of the recording means from the oldest to newest photographing times. when overwriting the X-ray fluoroscopic image, discloses an X-ray image diagnostic apparatus and displaying the X-ray fluoroscopic image to be erased.

With the above configuration, an operator who operates the X-ray diagnostic imaging apparatus has both the live image of the X-ray fluoroscopic image displayed on the first display unit and the X-ray fluoroscopic image to be overwritten and erased from the recording area of the recording unit. Since the diagnostic work of the subject can be performed while watching the X-ray fluoroscopic image of interest to be used for confirmation of the presence or absence of a lesioned part, the recording is stopped before being overwritten and erased from the recording area of the recording means. Accordingly, it is possible to prevent disappearance of the X-ray fluoroscopic image that is an object of interest, thereby preventing the X-ray fluoroscopic image from disappearing against the intention of the operator.
In addition, since the X-ray fluoroscopic image necessary for confirming the presence or absence of a lesion site does not disappear, a diagnostic work such as seeing through the subject again with X-rays is not necessary, and the amount of X-ray exposure to the subject is thereby eliminated. Can be prevented from increasing more than necessary, and the burden on the operator who operates the X-ray diagnostic imaging apparatus can be reduced.

  The X-ray diagnostic imaging apparatus of the present invention further includes a second display unit different from the first display unit, and the X-ray fluoroscopic image to be erased in advance is the first display unit or the second display unit. At least one of them is selectively displayed.

With the above configuration, the X-ray diagnostic imaging apparatus is operated to perform the fluoroscopic operation of the subject while viewing the first display means, and the second display means is monitored at the same time, and the fluoroscopic image is overwritten from the recording area of the recording means. Since the recording can be stopped before being erased, it is possible to reliably prevent the disappearance of the fluoroscopic image that is the object of interest.

X-ray image diagnostic apparatus of the present invention is obtained by further comprising an auxiliary recording means for recording the X-ray fluoroscopic image overwritten from the recording area of the recording means.

  With the above configuration, when recording is stopped before the X-ray fluoroscopic image displayed on the first display unit or the second display unit is erased, the fluoroscopic image that is of interest is erased with a delay in operation timing. Even in such a case, the target fluoroscopic image can be extracted from the fluoroscopic image recorded in the auxiliary recording means.

The X-ray diagnostic imaging apparatus of the present invention superimposes the X-ray fluoroscopic live image at the latest imaging time output from the imaging means and the X-ray fluoroscopic image overwritten and erased from the recording area of the recording means , The display means further includes display control means for simultaneously displaying the live image and the X-ray fluoroscopic image to be erased.

  With the above configuration, since only one display means is required, the space for installing the display means and the equipment cost can be reduced, and the operator of the X-ray diagnostic imaging apparatus can simultaneously display the live image and the X before the deletion. Since the fluoroscopic images can be viewed at the same time, the burden on the work can be reduced.

According to the X-ray diagnostic imaging apparatus of the present invention, the operation is stopped by stopping recording before the X-ray fluoroscopic image of interest to be used for confirmation of the presence or absence of a lesion site is overwritten and erased from the recording area of the recording means. It is possible to prevent the X-ray fluoroscopic image from disappearing against the intention of the person.

Embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall configuration diagram of an X-ray image diagnostic apparatus, and FIGS.
The X-ray diagnostic imaging apparatus shown in FIG. 1 irradiates a subject 1 with X-rays to perform fluoroscopy and X-ray imaging of a target portion of the subject 1 and includes a bed 2 on which the subject 1 lies. An X-ray source 3 composed of an X-ray tube that irradiates the subject 1 with X-rays and an imaging means 4 that detects the X-rays transmitted through the subject 1 are installed at positions facing each other with the bed 2 interposed therebetween. The angle of the X-ray source 3 and the imaging means 4 can be adjusted with the subject 1 as the center.
A high voltage generating means 5 is connected to the X-ray source 2, and X-rays are irradiated from the X-ray source 2 toward the subject 1 by a high voltage applied from the high voltage generating means 5. .
The imaging means 4 is composed of II (image intensifier), a TV camera and an A / D converter, or is composed of an FPD (flat panel detector), and detects X-rays transmitted through the subject 1. The digital image data obtained by the imaging means 4 is output to the first display means 7 via the line 6 while being connected to the imaging means 4 so as to be capable of data communication. Thus, an X-ray fluoroscopic image can be displayed on the first display means 7.

The high voltage generating means 5 and the imaging means 4 for applying a high voltage to the X-ray source 2 are connected to the output side of the control means 8 and operate the operating means 9 connected to the input side of the control means 8. Thus, the X-ray intensity, the imaging conditions by the imaging unit 4 and the like can be controlled via the control unit 8.
The line 6 connecting the imaging means 4 and the first display means 7 is branched from the middle, and the recording control means 13 is connected to the branch line 6a via the switch means 12 so that data communication is possible. The switch unit 12 is turned on / off by the recording control unit 8 in conjunction with the generation of X-rays, and can be turned on / off at an arbitrary timing by an operator operating the X-ray image diagnostic apparatus. ing.
The control means 8 is connected to the recording control means 13, and when the high voltage generation means 5 and the imaging means 4 are operated by the operation means 9, X-ray generation timing and image data output start are linked with these. It is possible to control the end and the like.
The recording control means 13 is connected to a temporary recording means 14 composed of a semiconductor memory or a high-speed magnetic desk (HDD) so as to be able to perform data communication. The digital data of the fluoroscopic image can be temporarily recorded. A second display unit 16 is connected to the recording unit 14 via an erasing control unit 15 so that data communication is possible. The recording control unit 13 and the erasing control unit 15 are operated by a control program incorporated in advance. To be controlled.
Further, an external recording means 17 is connected to the output side of the recording control means 13 so that data communication is possible so that a fluoroscopic image before being overwritten and erased from the recording area of the temporary recording means 14 from the oldest image pickup time can be recorded. It has become.

Next, the operation of the X-ray image diagnostic apparatus will be described with reference to the drawings shown in FIGS.
When the subject 1 to be diagnosed lies on the bed 2, the operating means is scanned to start fluoroscopy of the subject 1.
The subject 1 is viewed by irradiating the subject 1 with X-rays from an X-ray source.
Then, the X-rays that have passed through the subject 1 are detected by the imaging means 4 and sent as digital image data to the first display means 7 as shown in FIG. 2, and the first fluoroscopic image “ 1 "is displayed.
At this time, the switch means 12 is on, and the image data output from the imaging means 4 is also input to the recording control means 13 from the branch line 6a.
The X-ray fluoroscopic images picked up by the image pickup means 4 are normally picked up in an order of 30 sheets per second for 10 seconds, that is, 300 sheets or more. Although output, here, for the sake of simplicity of explanation, the recording area of the temporary recording means 14 is described as having a capacity capable of recording 10 fluoroscopic images.
The X-ray fluoroscopic image “1” is displayed on the first display means 7 by the first image data output from the imaging means 4 as shown in FIG. The fluoroscopic image “1” is recorded in the first recording area of the temporary recording means 14.

Similarly, X-ray fluoroscopic images “2”... “10” based on the image data output from the imaging unit 4 in the order of the imaging time are sequentially displayed on the first display unit 7 and at the same time by the 13th recording control unit. X-ray fluoroscopic images “2”... “10” are sequentially recorded in the recording area of the temporary recording means 14 in the order of imaging time. At this time, there is no X-ray fluoroscopic image to be erased. The means 15 is in a resting state, and the second display means 16 is not displaying an X-ray fluoroscopic image.
When fluoroscopy of the subject 1 advances and image data of the tenth fluoroscopic image “10”, which is the upper limit of the recording capacity of the temporary recording unit 14, is output from the imaging unit 4, the first display unit 7. The X-ray fluoroscopic image “10” based on the image data is displayed at the same time, and the recording control means 13 records the X-ray fluoroscopic image “10” in the last recording area of the temporary recording means 14 as shown in FIG. To do.
When the erasure control means 15 detects that the fluoroscopic image has been recorded up to the upper limit of the recording capacity of the temporary recording means 14, the image data of the next fluoroscopic image “11” is output from the imaging means 4. As shown in FIG. 3, the X-ray fluoroscopic image “1” recorded in the first recording area of the temporary recording unit 14 is read and the X-ray fluoroscopic image “1” is displayed on the second display unit 16 as shown in FIG. Display and prepare for erasure by overwriting that occurs immediately after.

Next, when the image data of the eleventh X-ray fluoroscopic image “11” is output from the imaging means 4, the X-ray fluoroscopic image “11” of the image data is the first display means 7 as shown in FIG. The recording control means 13 overwrites the X-ray fluoroscopic image “11” on the head area of the temporary recording means 14 and the erasing control means 15 simultaneously erases the second X-ray fluoroscopic image “ 2 ”is read from the recording area of the temporary recording means 14 and displayed on the second display means 16.
In FIG. 5, the image data of the 75th fluoroscopic image “75” is output from the imaging means 4, the fluoroscopic image “75” of the image data is displayed on the first display means 7, and the recording control is performed. At the same time as the X-ray fluoroscopic image “75” is recorded in the recording area of the temporary recording means 14 by the means 13, the erasing control means 15 temporarily records the 66th X-ray fluoroscopic image “66” to be erased next. 14 shows a state in which the data is read from 14 recording areas and displayed on the second display means 16.

The above operation is repeated until the X-ray irradiation from the X-ray source 3 toward the subject 1 is stopped and the output of the image data from the imaging unit 4 is stopped, as shown in FIG. At any point of time, the first display means 7 displays the current latest fluoroscopic image captured by the imaging means 4 in real time as a live image, and the second display means 16 starts from the recording area of the temporary recording means 14. An X-ray fluoroscopic image that is about to be erased is displayed.
As a result, the operator of the X-ray image diagnostic apparatus operates the X-ray image diagnostic apparatus while looking at the first display means 7 to perform the fluoroscopic operation of the subject 1 and simultaneously monitors the second display means 16. When the X-ray fluoroscopic image of interest to be used for confirmation of the presence or absence of a lesion site is displayed on the second display means 16, the switch means 12 is operated to capture an image from the recording area of the temporary recording means 14. The recording can be stopped before the X-ray fluoroscopic image is overwritten and erased in order from the oldest time, and the disappearance of the X-ray fluoroscopic image of interest can be prevented beforehand.
Further, when the recording is temporarily stopped by operating the switch unit 12, an X-ray fluoroscopic image before being erased is recorded in the external recording unit 17 connected to the output side of the erasing control unit 15. Even after X-ray fluoroscopy, operations such as confirmation of the presence or absence of a lesion site can be performed from the X-ray fluoroscopic image recorded in the external recording means 17.

On the other hand, in the above embodiment, the temporary recording means 14 is operated by operating the switch means 12 when the X-ray fluoroscopic image of interest to be used for confirmation of the presence or absence of a lesion site is displayed on the second display means 16. By stopping the recording before the X-ray fluoroscopic image is overwritten and erased from the recording area, the loss of the fluoroscopic image of interest is prevented. However, if the operation timing of the switch means 12 is delayed, it is desired to keep it. X-ray fluoroscopic images may also be erased.
In order to prevent this, in the modification shown in FIG. 6, the auxiliary recording means 18 is connected to the erasing control means 15 and, for example, “2” of the X-ray fluoroscopic image displayed on the second display means 16 is auxiliary recording means. 18 is also recorded.
As a result, even when the switch means 12 is operated before the X-ray fluoroscopic image “2” displayed on the second display means 16 is erased, even if the fluoroscopic image of interest is erased due to the operation timing being delayed. The intended fluoroscopic image can be extracted from the X-ray fluoroscopic image recorded in the auxiliary recording means 18 and recorded in the external recording means 17.

  Further, in the modification shown in FIG. 7, a display control unit 20 is installed in the middle of the line 6 that connects the imaging unit 4 and the first display unit 7 so that data communication is possible. The X-ray fluoroscopic image before erasing output from the erasing control means 15 is superimposed, and the live image and the X-ray fluoroscopic image to be erased are displayed on the first display means 7 at the same time. According to the modified example, since only one display means is required, the space for installing the display means and the equipment cost can be reduced, and the operator of the X-ray diagnostic imaging apparatus can simultaneously delete the live image and the pre-erase image. Since X-ray fluoroscopic images can be seen at the same time, the burden on the work can be reduced.

1 is an overall configuration diagram of an X-ray diagnostic imaging apparatus according to an embodiment of the present invention. It is explanatory drawing which shows the recording and the display state of a X-ray fluoroscopic image which were seen through with the X-ray image diagnostic apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing which shows the recording and the display state method of a X-ray fluoroscopic image which were seen through with the X-ray image diagnostic apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing which shows the recording and the display state of a X-ray fluoroscopic image which were seen through with the X-ray image diagnostic apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing which shows the recording and the display state of a X-ray fluoroscopic image which were seen through with the X-ray image diagnostic apparatus which becomes embodiment of this invention. It is explanatory drawing which shows the modification of the recording and the display state of a X-ray fluoroscopic image which were seen through with the X-ray image diagnostic apparatus which becomes embodiment of this invention. It is explanatory drawing which shows the modification of the recording and the display state of a X-ray fluoroscopic image which were seen through with the X-ray image diagnostic apparatus which becomes embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Subject 3 X-ray source 4 Imaging means 7 1st display means 14 Temporary recording means 16 2nd display means 18 Auxiliary recording means 20 Display control means

Claims (4)

An X-ray source that irradiates the subject with X-rays; an imaging unit that is disposed opposite to the X-ray source and that captures an X-ray fluoroscopic image of the subject from the X-rays that have passed through the subject; Recording means for recording the X-ray fluoroscopic image imaged by the imaging means in a recording area connected to be capable of data communication, and a first for displaying the X-ray fluoroscopic image taken by the imaging means In the X-ray diagnostic imaging apparatus comprising the display means, the first display means obtains the X-ray fluoroscopic images recorded in the recording area of the recording means from the chronological order of the newest X-ray fluoroscopic images. An X-ray diagnostic imaging apparatus for displaying the X-ray fluoroscopic image to be erased when overwriting .   The X-ray fluoroscopic image further comprising a second display unit different from the first display unit and to be erased in advance is selectively applied to at least one of the first display unit or the second display unit. The X-ray image diagnosis apparatus according to claim 1, wherein the X-ray image diagnosis apparatus is displayed. X-ray image diagnostic apparatus according to claim 1 or 2, characterized by further comprising an auxiliary recording means for recording the X-ray fluoroscopic image overwritten from the recording area of the recording means. The X-ray fluoroscopic live image at the latest imaging time output from the imaging unit and the X-ray fluoroscopic image overwritten and erased from the recording area of the recording unit are superimposed, and the live image is displayed on the first display unit. 4. The X-ray image diagnostic apparatus according to claim 1, further comprising display control means for simultaneously displaying the X-ray fluoroscopic images to be erased.

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