JPH03258247A - Ct scanner - Google Patents

Abstract

PURPOSE:To obtain a CT scanner capable of reducing the working load of an operator by mounting a floodlight means projecting light on a photographing position when it is detected that a top plate reaches a predetermined position by a detection means. CONSTITUTION:A bed 1 is an examinee mounting stand and a top plate 3 is provided to the upper part thereof and a sensor 4 detecting the position of the top plate 4 is provided to the side surface thereof and, after an examinee is mounted on the top plate 3, the top plate 3 is moved to a photographing region 9. When a head rest 5 moves from an a-position to a b-position, it is detected that the rear end of the top plate 3 reaches the position A by the sensor 4 and position data is outputted to a top plate position judging apparatus 11 and it is judged that the rear end of the top plate 3 reaches the position A and, further, lighting indication is applied to a floodlight projector lighting circuit 19 and a signal allowing a floodlight projector 7 to light is outputted to the floodlight projector 7 and light is projected on a photographing position while the top plate 13 is moved to insert the examinee in the photographing region 9 and a region to be diagnosed comes to the vicinity of the photographing position to be accurately set to said position. As a result, the working load of an operator can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Industrial Application Field) This invention relates to a CT scanner that projects light onto an imaging position to set a diagnostic region of a subject at the imaging position.

(Prior art) In a CT scanner such as an X-ray image diagnostic device or a magnetic resonance device, when setting the patient's diagnosis area to the imaging position, first,
The top plate on which the patient is placed is moved to the imaging area of the gantry. Then, when the patient's diagnostic region comes close to the imaging position, the movement of the top plate is stopped. Next, a light projector provided in the gantry is turned on to project light onto the photographing position. Furthermore, the top plate is moved until the patient's diagnostic site is illuminated, and the diagnostic site is accurately set at the imaging position.

In order to accurately set the diagnostic site at the imaging position, the operator manually turns on the floodlight each time a patient changes.

(Problem to be solved by the invention) However, 1. It is troublesome and burdensome for the operator to manually turn on the floodlight every time the person changes.

Therefore, this invention was made in view of such conventional circumstances, and its purpose is to automatically turn on the floodlight when the top plate comes to a predetermined position, thereby reducing the work burden on the operator. The purpose of the present invention is to provide a CT scanner that can perform the following tasks.

[Configuration of the Invention (Means for Solving the Problems)] In order to achieve the above object, the present invention moves a top plate on which a subject is placed to an imaging area, projects light onto the imaging position, and illuminates the subject. A CT scanner that sets a diagnostic region of and a light projecting means for projecting light onto the photographing position.

(Function) In the above configuration, the present invention moves the top plate on which the subject is placed to the imaging area. When the top plate reaches a predetermined position, it is detected by the detection means. Thereby, the photographing position is automatically illuminated by the light projecting means.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 shows an X-ray CT scan related to the CT scanner of the present invention.
FIG. 2 is a block diagram showing a configuration for detecting the position of a top plate.

In FIG. 1, a bed 1 is a test subject mounting table, and a top plate 3 is provided on the top of the bed 1. Further, a sensor 4 for detecting the position of the top plate 3 is provided on the side surface of the bed 1.

The top plate 3 is for placing a subject (not shown),
A headrest 5 for holding the subject's head is attached to the front (left end in the figure). In addition, the top plate 3 is
It moves along the longitudinal direction of the bed 1 (left-right direction in the figure) and inserts the subject into the imaging area 9 of the gantry 7.

The sensor 4 is located at the rear end (right end in the figure) of the moving top plate 3.
This is to detect when the object has reached the position of .

Further, the detected position information is output to the top position determination device 11 shown in FIG.

The gantry 7 has an X-ray tube 13 and a detector 1 inside it.
5 is provided to photograph the diagnostic site of the subject at the photographing position (dashed line in the figure). Furthermore, a light projector 17 is provided inside the gantry 7 to project light onto the diagnostic site.

The light projector 7 projects light onto the photographing position, and emits light in response to instructions from a projector lighting circuit 19 shown in FIG.

In FIG. 2, the top position determination device 11 includes a sensor 4
It is determined whether the rear end of the top plate 3 has reached the position A based on the information outputted by the controller.

Furthermore, when the top plate position determination device 11 determines that the rear end of the top plate 3 has come to the position A, it gives a lighting instruction to the projector lighting circuit 19.

The light projector lighting circuit 19 lights the projector 17 when a lighting instruction is given from the top plate position determining device 11.

One embodiment of the present invention is thus constructed, and will now be described in detail.

FIG. 3 is a schematic diagram for explaining how the headrest 5 moves.

In the figure, a is a position outside the gantry 7, b is the same position as the front of the gantry 7, and C is a position on the outside of the gantry 7.
indicates the inner position of Note that when the headrest 5 is at position b, the rear end of the top plate 3 is at position A.

After placing the subject on the top plate 3, the operator moves the top plate 3 to the imaging area 9 by operating a console (not shown) or the like.

When the headrest 5 moves from position a to position b, the sensor 4 detects that the rear end of the top plate 3 has come to position A.

Thereby, the position information detected by the sensor 4 is output to the top position determining device 11.

The top position determination device 11 inputting this position information determines
It is determined that the rear end of the top plate 3 has reached position A. Further, as a result of this determination, a lighting instruction is given to the projector lighting circuit 19.

When the lighting instruction is given, the floodlight lighting circuit 19
A signal for lighting the floodlight 17 is sent from the floodlight 1.
7.

The light projector 17 is turned on by this signal, and the photographing position is illuminated.

While the photographing position is illuminated by the light projector 17, the top plate 3 is further moved and the subject is inserted into the photographing region 9. When the diagnostic site of the subject comes near the imaging position, the diagnostic site is accurately set at the imaging position.

In this way, when the headrest 5 comes to the same position as the front of the gantry 7, the floodlight 17 is automatically turned on. Thereby, the imaging position is illuminated, and the diagnostic site can be quickly set at the imaging position.

Although it is possible to turn on the floodlight 17 when the headrest 5 is in the a position or the C position, it is possible that the patient is not placed on the top plate 3 when the headrest 5 is in the a position. Conceivable. Furthermore, turning on the light after reaching the C position is slow in accurately setting the diagnostic site at the imaging position. Therefore, it is most suitable to turn on the light when it reaches position b.

Further, in this embodiment, only an X-ray CT apparatus has been described, but it is of course possible to implement the present invention with other CT scanners such as a magnetic resonance apparatus.

[Effects of the Invention] As explained above, with the CT scanner according to the present invention, the floodlight is automatically turned on when the top plate comes to a predetermined position, so it is not necessary to turn on the floodlight every time the patient changes. You can eliminate the troublesome work of doing it manually. This makes it possible to reduce the operator's workload.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the OCT scanner of the present invention, Fig. 2 is a block diagram showing a structure for detecting the position of the top plate, and Fig. 3 shows the movement of the headrest shown in Fig. 1. It is a schematic diagram for explanation.

Claims (1)

[Scope of Claims] C: moving the top plate on which the subject is placed to the imaging area, projecting light to the imaging position, and setting the diagnostic region of the subject at the imaging position;
In the T-scanner, a detection means for detecting that the top plate being moved has come to a predetermined position, and when the detection means detects that the top plate has come to a predetermined position, projecting light to the photographing position. A CT scanner characterized in that it is equipped with a light projecting means.