JPH01284240A - Medical device - Google Patents

Abstract

PURPOSE:To easily position a diagnosed part or remedied part by forming a groove on the longitudinal direction edge of a slide ceiling plate and installing a position setting piece in slidable ways into the groove and installing a sensor for detecting the position setting piece. CONSTITUTION:A groove 12b is formed on the longitudinal edge of a slide ceiling plate 12a, and a position setting piece 12c is installed in slidable ways in the groove 12b. For example, an optical sensor 13 for detecting the position setting piece 12c is installed onto the inner wall of the center of the magnetic field of the magnet assembly MA of a magnetic resonance image device, and a control part is installed onto a bed controller in order to suspend the slide operation of a slide ceiling plate 12a when the optical sensor 13 detects the position setting piece 12c, in other words, the position setting piece 12 shields the transmission or received light of the optical sensor 13. When the belly part is photographed for an inspected patient on the slide ceiling plate 12a, the positioning piece 12c is slided through the groove 12b to the position of the belly part, and the positioning piece 12c is detected by the sensor 13, and the belly part is positioned at the center of the magnetic field in the body.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to magnetic resonance (MR)
The internal a main body in which a specific part for diagnosis or treatment is determined; and a bed device comprising a slide top plate for introducing the part to be diagnosed or treated of the subject into the specific part of the main body. In particular, the present invention relates to a medical device that allows easy positioning of a diagnostic site or a treatment site.

(Prior Art) A magnetic resonance imaging device will be described as one type of medical device. In other words, the magnetic resonance phenomenon is a phenomenon in which an atomic nucleus with non-zero spin and magnetic moment placed in a static magnetic field resonantly absorbs and emits only electromagnetic waves of a specific frequency. It resonates at the frequency ω0 (ω.−2πν0.shi0; Larmor frequency).

ωo1γH0 Here, γ is the gyromagnetic ratio specific to the type of atomic nucleus,
Further, Ho is the static magnetic field strength.

An apparatus that performs biological diagnosis using the above-mentioned principle processes electromagnetic waves of the same frequency as above, which are induced after the above-mentioned resonance absorption, to determine nuclear density, longitudinal relaxation time Tl, transverse relaxation time T2, and so on. Diagnostic information that reflects information such as flow and chemical shift, such as slice images of a subject, can be obtained non-invasively.

Collecting diagnostic information by magnetic resonance can excite all parts of a subject placed in a static magnetic field and collect signals, but there are limitations in the equipment configuration and clinical requirements for imaging images. Therefore, in an actual device, a specific part is excited and its signal is collected.

In this case, the specific region to be imaged is generally a sliced region with a certain thickness;
Magnetic resonance signals (MR multiplied signals) of echo signals and FID signals from this slice site are collected by performing a data encoding process many times, and these data groups are subjected to image reconstruction processing using, for example, a two-dimensional Fourier transform method. By doing so, an image of the specific slice region is generated.

FIG. 2 is a diagram showing the overall configuration of this type of magnetic resonance imaging apparatus.

As shown in FIG. 2, a magnet assembly MA forming a main body capable of accommodating a subject P therein includes a static magnetic field coil 1 using a normal conductivity or superconductivity method, and a magnetic resonance signal inducing region. x-, y-, and z-axis gradient magnetic field generating coils 2 for generating gradient magnetic fields for imparting positional information, and a magnetic resonance signal (for detecting the MR multiplied signal) induced while transmitting a rotating high-frequency magnetic field. A static magnetic field control system 4 which includes a transmitting/receiving system, for example, a probe 3 consisting of a transmitting coil and a receiving coil, and in the case of a superconducting system, includes a refrigerant supply control system and mainly controls the energization of a static magnetic field power source; A transmitter 5 that controls the transmission of RF pulses, and a receiver 6, x, y that controls the reception of induced MR multiplied signals.
, the X-axis, which performs excitation control of each of the gradient magnetic field generating coils 2 on the Z-axis.

Consists of Y-axis and Z-axis gradient magnetic field power supplies 7.8.9, a sequencer 10 capable of implementing a pulse sequence for data collection, and a computer system 11 that controls these and performs signal processing of detection signals and display thereof. has been done. Then, the subject P is introduced into the magnet assembly MA that forms the main body by the bed device 12. That is, the bed device 12 is installed close to the magnet assembly MA that forms the main body, and the patient P is placed on the slide top plate 12a provided on the top of the bed device 12.
It is now possible to load. Further, a positioning light projector 13 is provided in front of the subject introduction cavity of the magnet assembly MA.

In the above-described configuration, the procedure for actual diagnosis (imaging) is as follows: First, the subject P gets on the slide top plate 12a and positions the area to be imaged. That is, when it is desired to photograph a slice image of a specific position on the abdomen of the subject P, the slide top plate 12a is operated to place the position directly under the projector 13. Thereby, the position is placed directly below the projector 13, and by pressing the positioning setting switch here, the slide top plate 12a is operated and the position is determined at the center of the magnetic field. This positioning mechanism is realized by sliding the distance H between the position of the projector 13 and the center position of the magnetic field, which is known in advance.

Here, the transmitter 5 is driven, and the RF pulse of the rotating magnetic field is sent from the transmitting coil of the probe 3 (90@pulses).

180° pulse) and a gradient magnetic field power supply of 7°8.
9 to generate a gradient magnetic field Gx from the gradient magnetic field generating coil 2.
, Gy, and Gz are added for two-phase encoding for slicing and for reading, and the signal from the specific region is collected by the receiving coil of the probe 3. This sequence is repeated a predetermined number of times to obtain a data group, and an image is generated from this data group.

(Question 8 to be Solved by the Invention) In the above, the procedure for positioning the part to be imaged is to first recognize the position of the subject P to be imaged, and to place the position directly under the projector 13 using a slide top. 12a and pressing a switch, which is a positioning mechanism employed not only in magnetic resonance imaging devices but also in most medical devices of this type.

The operation requires three steps and is troublesome. In particular, magnetic resonance imaging devices are devices that can image any location using only electrical operations, even if the imaging site is set at a certain distance from the center of the magnetic field, and this type of device is often compared. This is different from the XgCT scanner device.

The imaging position in an X-ray CT scanner device is specified by the irradiation position of the X-ray beam, and although the above-mentioned positioning mechanism is very effective in an X-ray CT scanner device, it is excessively effective in a magnetic resonance imaging device. It can be said that it has a very good structure.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a medical device that allows easy positioning of a diagnostic site or a treatment site.

[Structure of the Invention] (Means for Solving the Problems) The present invention has a structure in which the following measures are taken to solve the above problems and achieve the objects. That is, the present invention includes a main body in which a specific part for diagnosis or treatment is defined, and a slide slide for introducing the part to be diagnosed or treated of a subject into the specific part of the main body. In a medical device consisting of a bed device equipped with a plate,
The slide top plate has a groove formed on its longitudinal edge, a positioning setting piece is slidably provided in the wave groove, and the positioning setting piece is detected at a part of the main body corresponding to the specific part. The present invention is characterized in that it is provided with a sensor capable of doing so, and includes means for stopping the sliding operation of the slide top plate when the sensor detects the positioning setting piece.

(Function) According to such a configuration, when it is recognized that the subject wants to photograph the abdomen while riding on the slide top plate, the simple operation of setting the positioning setting piece at the position where the abdomen is located can be performed. Then, the sensor detects the positioning setting piece and stops the sliding movement of the slide top plate, thereby making it possible to position the abdomen at a specific location within the main body, such as the center of the magnetic field or the beam irradiation position.

(Embodiment) An embodiment of the medical device according to the present invention will be described below with reference to FIG. 1, which shows the main parts thereof.

As shown in FIG. 1, in this embodiment, the slide top plate 12a
has a groove 12b formed on its longitudinal edge, and the wave groove 1
A positioning setting piece 12c is slidably provided on 2b. For example, if applied to the magnetic resonance easing device shown in FIG. 2, an optical sensor 14 for detecting the positioning setting piece 12c is provided on the inner wall of the magnetic field center of the magnet assembly MA, and the sensor 14 detects the positioning setting piece 12c. In order to stop the sliding operation of the slide top plate 12a when it is detected, that is, when the positioning setting piece 12c blocks the light transmission and reception at the optical sensor 14, a control unit is attached to the bed control device (not shown). ing.

Next, the operation of this embodiment configured as described above will be explained as an example applied to the magnetic resonance imaging apparatus shown in FIG. 2. That is, when it is recognized that the subject wants to photograph the abdomen while riding on the slide top plate 12a, the positioning setting piece 12c is set at the position where the abdomen is located by a simple operation of sliding the positioning setting piece 12c through the groove 12b. , the sensor 13 detects the positioning setting piece 12c and the slide top plate 12a
The sliding motion of the device is stopped, which allows the abdomen to be positioned at the center of the magnetic field within the body.

By installing a positioning mechanism with this configuration and a conventional positioning mechanism using a floodlight in parallel, it is possible to use the mechanism shown in Figure 1 for rough positioning, and to use the mechanism using the floodlight for precise positioning. if,
It's practical.

Note that the groove 12b and the setting piece 12c may be provided on both edges of the top plate 12a, or may be provided on only one side. Moreover, the detection method of the setting piece 12c may be a method other than the tip. Furthermore, the engagement mechanism between the groove 12b and the setting piece 12c is not specified.

This pond water invention can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] As described above, in the present invention, the slide top plate has a groove formed on its longitudinal edge, and a positioning setting piece is slidably provided in the groove to correspond to a specific part of the main body. A sensor capable of detecting the positioning setting piece is provided at the part where the positioning setting piece is detected, and a means for stopping the sliding movement of the slide top plate when this sensor detects the positioning setting piece is provided. When it recognizes that you want to photograph the abdomen while riding on the camera, simply set the positioning setting piece at the position where the abdomen is located, the sensor detects the positioning setting piece, and the sliding movement of the slide top plate is activated. This allows the abdomen to be positioned at a specific location within the body, such as the center of the magnetic field or the beam irradiation position.

Therefore, according to the present invention, it is possible to provide a medical device that allows easy positioning of a diagnostic site or a treatment site.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main parts of the medical device according to the present invention, and FIG.
The figure is a diagram showing the configuration of a magnetic resonance imaging device as an example of a medical device. MA... Magnet assembly, 1... Static magnetic field coil, 2... Gradient magnetic field generation coil for x, y, and z axes, 3
... Probe, 4... Static magnetic field control system, 5... Transmitter, 6... Receiver, 7... X-axis gradient magnetic field power supply, 8...
...Y-axis gradient magnetic field power supply, 9...Z-axis gradient magnetic field power supply, 1
0...Sequencer, 11...Computer system, 12...Bed device, 12a...Top plate, 12b...
- Groove, 12c... Positioning setting piece, 13... Optical sensor. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] A bed device comprising a main body in which a specific part for diagnosis or treatment is defined, and a sliding top plate for introducing the part to be diagnosed or treated of a subject into the specific part of the main body. In the medical device, the slide top plate has a groove formed in its longitudinal edge, and a positioning setting piece is slidably provided in the groove, and a positioning setting piece is slidably provided in the groove, and a positioning setting piece is slidably provided in the groove, and a positioning setting piece is slidably provided in the groove. A medical device comprising: a sensor capable of detecting the positioning setting piece; and means for stopping the sliding movement of the slide top plate when the sensor detects the positioning setting piece.