JPH0464261B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an X-ray CT,
It relates to tomography devices such as NMR imaging devices.

(Prior Art) FIG. 2 is a schematic diagram of a conventional NMR imaging apparatus, which is one type of tomography apparatus. Second
In the figure, 1 is a magnetically shielded room equipped with a lighting lamp 2, and 3 is a cylindrical space equipped with coils that form a uniform static magnetic field and coils that detect desired tomographic imaging data. Magnet part, 4
is a table on which the subject 5 is placed on a cradle and inserted into the coil; 6 is a positioning light for positioning the subject 5; and 7 is an operator console for setting scan sequences and performing image diagnosis. . In the above configuration, scan data collection and image reconstruction processing are performed under the control of the operator console 7 while the subject is placed on the cradle and installed in the cylindrical space inside the magnet section 3. The tomographic image of the subject 5 is displayed on the screen of the operator console 7. In such tomography, positioning of the target region of the subject 5 for imaging is performed using the positioning light 6. This positioning method will be explained using FIG. 3. Figure 3 shows the conventional example.
FIG. 2 is a perspective view showing the vicinity of a magnet section in the NMR imaging apparatus. In FIG. 3, each symbol is used with the same meaning as in FIG. 2. During positioning, with the subject 5 placed on the cradle placed near the opening of the magnet section 3, the marker lights of the positioning lights 6a, 6b, and 6c
The object 5 is irradiated from this direction. The operator, relying on this marker light, moves the table 4 to adjust the position of the subject, aligns the subject with the coordinates of the mechanical system, and determines the imaging range and reference point based on this.

(Problems to be Solved by the Invention) The light source of this positioning light includes a laser beam. However, since laser light is harmful to the eyes and the equipment is expensive, there are some that use halogen light, a slit, or a lens to focus the light and use it as a light source for a positioning light. However, especially when using halogen light, the marker light of the positioning light
A problem arises in that the illumination in the photography room makes it difficult to see and positioning is difficult.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a tomography apparatus that allows easy positioning using a positioning light.

(Means for Solving the Problems) In order to achieve the above object, the tomography apparatus of the present invention has the following configuration.

That is, it is a device that is installed in an imaging room and is equipped with illumination means, and uses a positioning light to position the part of the subject to be imaged, places the subject in a cylindrical opening, and obtains a tomographic image. A tomography apparatus for imaging images, characterized in that a control means is provided for dimming the light of the illumination means in conjunction with the lighting of the positioning light, and returning the light to the original brightness in conjunction with the turning off of the light. shall be.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an illumination light control means according to an embodiment of the present invention. Incidentally, in FIG. 1, each symbol is used with the same meaning as in FIGS. 2 and 3, so a description thereof will be omitted here.

In FIG. 1, reference numeral 8 is an operation switch installed in the photographing room to switch on and off the positioning lights 6a to 6c, 9 is a power source for illumination light 2, and 10
11 is an external switch for switching the illumination lamp 2 on and off, and 11 is an illumination lamp control circuit. 12 is a power source for the positioning light; 13 is an ON/OFF operation of the operation switch 8 or ON from another control circuit;
Power supply 1 of positioning light is turned off by OFF command.
2 and a positioning light control relay that controls the connection of the positioning lights 6a to 6c, and 14 is turned OFF when the positioning light control relay 12 is turned ON, and the positioning light control relay 12 is turned OFF. This is an illumination light control relay that turns on in conjunction with this.

The operation of the above configuration will be explained. At the time before positioning, the external switch 10 is
ON, positioning light control relay 13 is
OFF, the illumination light control relay 14 is ON, and the positioning lights 6a to 6c are turned off.
Lighting lamp 2 is on. Here, when the operation switch 8 is turned ON or there is an ON command from another control circuit, the positioning light control relay 13 is turned ON.
Then, the positioning light power source 12 and the positioning lights 6a to 6c are connected, and the positioning lights 6a to 6c are turned on. In conjunction with this, the illumination light control relay 14 is turned off, and the illumination light 2 is turned off. Therefore, the interior of the photographing room becomes dark in conjunction with the lighting of the positioning lights 6a to 6c. After positioning, turn off the operation switch 8,
Or when there is an OFF command from another control circuit, the positioning light control relay 13 turns OFF.
The positioning lights 6a to 6c are turned off. In conjunction with this, the illumination light control relay 14 is turned on, and the illumination light 2 is turned on. Therefore, the interior of the photographing room becomes brighter in conjunction with turning off the positioning lights 6a to 6c.

As described above, according to the tomography apparatus of the present invention, the light from the illumination lamp 2 is transferred to the positioning light 6.
By dimming the light when lights a to 6c are turned on and returning them to the original brightness when they turn off, the marker light of the positioning light is easy to see even when a weak light is used as a light source. can be easily positioned.

It should be noted that the present invention is not limited to the above embodiments, and can be modified in various ways within the scope of the claims. For example, it may be used in an X-ray CT device. Furthermore,
The illumination light control relay 14 may be configured using a transformer, a changeover switch, a thyristor, or the like, and may weaken the light of the illumination lamp 2 in conjunction with the lighting of the positioning lights 6a to 6c.

(Effects of the Invention) As explained above, according to the tomography apparatus of the present invention, the light of the illumination light is reduced in conjunction with the lighting of the positioning light, so that the marker light of the positioning light is reduced. It is easy to see and allows easy positioning of the subject. Moreover, since halogen light can be used as a light source for the positioning light, it is safe and inexpensive.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an illumination light control means according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing a conventional NMR imaging apparatus, and FIG. 3 is a schematic diagram showing a conventional NMR imaging apparatus.
FIG. 2 is a perspective view showing the vicinity of a magnet section in the NMR imaging apparatus. 1... Magnetically shielded room, 2... Lighting lamp, 3... Magnet section, 4... Table, 5... Subject, 6, 6
a, 6b, 6c...positioning light, 7...operator console, 8...operation switch, 9...
Power supply for illumination light, 10... External switch, 11... Illumination light control circuit, 12... Power supply for positioning light, 13... Positioning light control relay, 1
4...Lighting light control relay.

Claims (1)

[Claims] 1 A device installed in an imaging room equipped with lighting means, which uses a positioning light to position the part of the subject to be imaged, places the subject in a cylindrical opening, and obtains a tomographic image. The tomography apparatus for imaging is characterized by being provided with a control means that dims the light of the illumination means in conjunction with the lighting of the positioning light, and returns to the original brightness in conjunction with the turning off of the light. A tomography device.