JP3003868B2 - X-ray CT scanner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an X-ray CT scanner provided with a surgical couch device on which a subject is placed and in which the subject can be moved.

(Prior art) In recent years, a CT scanner device conventionally installed in a separate room is installed in an operating room, and a CT image of a desired portion of a subject (for example, a head with a head opened) during an operation. (Tomographic image)
In many cases, obtaining a CT image of the desired site immediately after an operation is performed.

In the case above, it is located near the surgeon (doctor),
Move the surgical couch with moving means (for example, casters) to the gantry of the CT scanner to obtain CT images, or vice versa. CT images were obtained by moving the gantry to a surgical bed.

(Problems to be Solved by the Invention) However, although the above-mentioned surgical couch device includes a horizontal movement mechanism for moving the subject in the horizontal direction and a vertical movement mechanism for moving the subject in the vertical direction, When an image of a desired portion of the subject is taken because an electrical signal cannot be transmitted to and received from the gantry, it is not only difficult for the operator to perform positioning unless a large number of portions near the desired portion are taken. There is a problem that the irradiation of the radiation causes exposure.

The present invention has been made in view of the above-described problems.Electric signals can be transmitted and received between the gantry unit and the operation couch device, positioning of a desired part of the subject is facilitated, and It is an object of the present invention to provide an X-ray CT scanner that can prevent irradiation of unnecessary X-rays.

[Constitution of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an X-ray tube for irradiating an X-ray, and an X-ray tube that is disposed to face the X-ray tube and transmits a subject. A gantry having an X-ray detector for detecting X-rays, the gantry being movable by gantry moving means, and an object connected to the gantry so as to be capable of transmitting and receiving electric signals, and capable of moving the mounted object. A surgical bed apparatus having moving means, a position detecting means for detecting the position of the subject, and the moving of the subject based on the position of the subject detected by the position detecting means and a control signal from the gantry. Control means for controlling the means;
It is characterized by having.

(Operation) According to the present invention, the gantry movable by the gantry moving means and the surgical bed apparatus having the subject moving means capable of moving the placed subject can transmit and receive electric signals. Connected. The control means controls the subject moving means based on the position of the subject detected by the position detecting means and a control signal from the gantry.

This makes it easy to position a desired part of the subject, thereby preventing the subject from being irradiated with unnecessary X-rays.

(Example) An example of the present invention will be described with reference to the drawings.

FIG. 1 is a structural explanatory view showing one embodiment of the present invention, and FIG.
The figure is a schematic explanatory diagram of the position detecting means.

As shown in FIG. 1, a surgical couch device 1 includes a horizontal moving mechanism 2 for moving a patient (subject) in a horizontal direction, a vertical moving mechanism 3 for moving a patient in a vertical direction, a CT scanner 7, and an electric scanner. And a position detecting means 5 for detecting a position to which the subject has moved, and a position detecting signal from the position detecting means and the CT scanner device 7, respectively.
It is connected to a moving mechanism section control means 6 for controlling the horizontal moving mechanism section 2 and the vertical moving mechanism section 3 based on a control signal from the controller.

As shown in FIG. 2, the horizontal moving mechanism 2 of the surgical bed apparatus 1 includes a top 8 and a motor 9 for driving the top 8.
And a sprocket 10 arranged coaxially with the motor 9 and transmitting its power to the top plate 8 via a chain 11.

An encoder 12 as the position detecting means 5 is disposed at a position coaxial with the motor 9 and the sprocket 10.

As shown in FIG. 3, the vertical moving mechanism 3 is moved up and down by, for example, a hydraulic cylinder 3a, and the position detecting means 5 detects a rotation amount of a pulley driven by a wire rope attached to a frame. It has an encoder and the like (not shown).

According to the surgical bed apparatus 1 described above, the patient (subject) is
Is detected by the encoder 12 as the position to which the top plate 8 has moved, and the position to which the patient (subject) has moved vertically is regarded as the position to which the hydraulic cylinder 3a has moved, by the encoder or the like (not shown). These detection signals are sent to the CT scanner device 7 via the connection means 4 via the moving mechanism control means 6.

Next, a case where the above-described surgical bed apparatus 1 is applied to a CT scanner apparatus in which a gantry has moving means will be described with reference to the drawings.

FIG. 4 is a configuration explanatory view showing a CT scanner device having a movable gantry as one embodiment of the present invention.

As shown in FIG. 4, the operating couch device 1 is electrically connected to the gantry 16 by the connecting means 4.

The CT scanner device 7 includes an X-ray tube 13 and the X-ray tube 13.
A gantry 16 comprising an X-ray detector 14 and a gantry control unit 15 which are arranged to face the gantry, and which is movable in contact with a gantry moving vehicle (moving means) 17; and an input unit for inputting information 19, and a main control unit 21 for connecting the display unit 20 for displaying information and the like and controlling the entire CT scanner device 7. In the figure
Reference numeral 18 denotes a power supply for driving the gantry moving carriage 17.

Next, the operation of the CT scanner device having a movable gantry as one embodiment of the present invention will be described with reference to FIG.

As described above, the surgical couch device 1 is connected to the CT scanner device 7 (in FIG.
6), electrical signals can be transmitted and received, and a scanogram can be taken while the subject is placed on the surgical bed 1.

That is, similarly to a normal CT scanner device (not shown), information is input from the input unit 19, and the X-ray tube 13 and the X-ray detector 14 in the CT scanner device 7 are fixed at fixed positions. The surgical couch device 1 on which the subject is placed
Is moved to the height of an imaging hole (not shown) of the CT scanner device 7 by the hydraulic cylinder 3a.

Then, the top 8 is driven by a motor 9 to move between the X-ray tube 13 and the X-ray detector 14 while exposing X-rays toward the subject in synchronization with the movement of the top 8. Shoot, general X
A scano image similar to the fluoroscopic image is obtained. At this time, the motor 9
Sprocket 10 that transmits the drive of the motor via a chain 11
And the detection signal of the encoder 12 arranged coaxially and
Based on the control signal from the CT scanner device 7 (the gantry 16 in FIG. 4), the moving mechanism control means 6 controls the top plate 8 so that the bed device of a normal CT scanner device (not shown) It can operate in the same way as.

Then, as shown in FIG. 5, a display unit (hereinafter also referred to as a CRT display) 20 in the CT scanner device displays a scanogram 23 and a plurality of equally spaced instruction lines 22 (22a, 22b) indicating positions where tomography can be performed. , 22c ...) are displayed at the same time.

After that, the operator looks at the scano image 23 and specifies the tomographic region, and then inputs the number assigned to the corresponding instruction line 22 on the CRT display 20 through the input unit (keyboard or the like) 19. When input, this input signal (control signal)
Based on the position detection signal of the encoder 12 and the moving mechanism unit control means 6, the couch top 8 is moved so that the tomographic portion of the subject is located immediately below the X-ray tube 13; Tomography is performed by rotating the X-ray tube 13.

As described above, according to the above-described embodiment, since a scanogram similar to that of a normal CT scanner device is obtained, it is easy to position a desired portion of the subject, and it is possible to irradiate the subject with unnecessary X-rays. The tomography can be easily performed.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made within the scope of the present invention.

[Effects of the Invention] As described above, according to the present invention, it is possible to easily position a desired part of a subject, and to prevent the subject from being irradiated with unnecessary X-rays.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is a schematic explanatory view of a horizontal moving mechanism, FIG. 3 is a schematic explanatory view of a vertical moving mechanism, and FIG. 4 is a structural explanatory view showing a CT scanner having a movable gantry as one embodiment of the present invention. FIG. 5 is a schematic view of a display unit for explaining the operation of one embodiment of the present invention. 1 ... Surgical bed device, 2 ... Horizontal moving mechanism, 3 ...
Vertical moving mechanism 4, connecting means 5, position detecting means 6, moving mechanism controlling means 7, CT scanner device.

Claims (1)

(57) [Claims] An X-ray tube for irradiating X-rays and an X-ray detector arranged opposite to the X-ray tube and detecting X-rays transmitted through a subject, are moved by a gantry moving means. A susceptible platform, a surgical couch device connected to the cradle so as to be capable of transmitting and receiving electric signals, and having a subject moving means capable of moving a placed subject; and a position for detecting the position of the subject. X-rays comprising: a detection unit; and a control unit that controls the subject moving unit based on a position of the subject detected by the position detection unit and a control signal from the gantry.
CT scanner.