JPH0551306U - Bridge integrated body coil - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the number of steps for assembling an MR diagnostic device. [Structure] The body coil portion 5 of the bridge-integrated body coil 10 has a length of 1.5 m or less and is integrated at the central portion of the bridge portion 6. In addition, the inner diameter near the opening of the bore of the MR diagnostic device is increased. [Effect] Only one alignment with the magnet is required.
It can reduce the feeling of pressure on the patient. Furthermore, vibration and noise can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bridge-integrated body coil, and more particularly to a bridge-integrated body coil that can reduce the number of steps for assembling an MR diagnostic apparatus.

[0002]

[Prior Art]

 FIG. 3 shows a sectional view of a conventional MR diagnostic apparatus 51. As shown in the drawing, an outer coil 3 for gradient magnetic field and an inner coil 4 for gradient magnetic field are contained inside the magnet 2. A body coil 55 is placed inside the gradient magnetic field inner coil 4. Both ends of the body coil 55 are fixed to the end surface of the magnet 2 by studs 58.

Inside the body coil 55 is a bridge 56 that supports the patient within the bore. The bridge 56 is supported by bridge supports 57 from both end surfaces of the magnet 2.

[0004]

[Problems to be solved by the invention]

 In the MR diagnostic apparatus, it is necessary to align the magnet, each coil, and the bridge with high accuracy in order to eliminate image distortion. However, since the body coil 55 and the bridge 56 are separately fixed to the end surface of the magnet 2 in the above-mentioned conventional MR diagnostic apparatus 51, the alignment with respect to the magnet 2 must be performed separately and the assembly is performed. There was a problem that the man-hours increased.

An object of the present invention is to provide a bridge-integrated body coil improved so that the number of assembling steps of the MR diagnostic apparatus can be reduced.

[0006]

[Means for Solving the Invention]

 The bridge-integrated body coil of the present invention is characterized in that the body coil of the MR diagnostic apparatus is integrated with the bridge.

[0007]

[Action]

 In the bridge-integrated body coil of the present invention, since the body coil and the bridge are integrated, the positioning with respect to the magnet only needs to be performed once. Therefore, the number of steps for assembling the MR diagnostic device can be reduced.

In order for the body coil to perform its function, as shown by L in FIG. 3, it is sufficient if the body coil has a length capable of covering the central portion of the magnet. Therefore, if the length of the body coil is set to 3/4 or less of the length of the magnet and it is supported at the center of the bridge, the inner diameter in the vicinity of the opening of the bore can be increased, reducing the feeling of pressure on the patient. Can be reduced. Further, since the vibration generated by the gradient magnetic field coil is less likely to be transmitted to the body coil, vibration and noise can be reduced.

[0009]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. The invention is not limited to this. FIG. 1 is a sectional view of an MR diagnostic apparatus 1 including a bridge-integrated body coil 10 according to an embodiment of the present invention. Reference numeral 2 is a magnet, 3 is an outer coil for gradient magnetic field, and 4 is an inner coil for gradient magnetic field. Reference numeral 5 denotes a body coil portion of the bridge-integrated body coil 10. Reference numeral 6 is a bridge portion of the bridge-integrated body coil 10. 7 is a bridge support. Further, 20 is a sound absorbing material.

As shown in the figure, an outer coil 3 for a gradient magnetic field and an inner coil 4 for a gradient magnetic field are contained inside the magnet 2. Inside the gradient magnetic field inner coil 4, a bridge-integrated body coil 10 is inserted. The body coil portion 5 of the bridge-integrated body coil 10 is designated by a bridge portion 6, and the bridge portion 6 is supported by both ends of the magnet 2 by a bridge support 7.

The sound absorbing member 20, which is, for example, a void, is attached from both ends of the body coil portion 5 to both ends of the magnet 2 so as to cover the outer coil 3 for gradient magnetic field and the inner coil 4 for gradient magnetic field. ..

FIG. 2 is a perspective view of the bridge-integrated body coil 10. The body coil portion 5 and the bridge portion 6 are integrally molded by FRP.

The magnet 2 has a length of about 2 m, and the body coil portion 5 has a length L of about 1. It is 5m.

According to the bridge-integrated body coil 10 described above, the body coil and the bridge can be positioned once with respect to the center of the magnet 2. Therefore, the labor and process of mounting can be reduced. Further, since the length L of the body coil portion 5 is shorter than that of the magnet 2, the bore diameter of the opening portion of the bore can be made larger than in the conventional case. Therefore, it is possible to reduce the feeling of pressure on the patient. Further, the vibrations generated by the outer coil 3 for gradient magnetic field and the inner coil 4 for gradient magnetic field are less likely to be transmitted to the body coil portion 5, so that vibration and noise can be reduced. Further, by attaching the sound absorbing material 20, it becomes even quieter.

[0015]

[Effect of the device]

 According to the bridge-integrated body coil of the present invention, the number of assembling steps of the MR diagnostic device can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of an MR diagnostic apparatus using a bridge-integrated body coil of the present invention.

FIG. 2 is a perspective view of an embodiment of a bridge-integrated body coil of the present invention.

FIG. 3 is a sectional view of a conventional MR diagnostic apparatus.

[Explanation of symbols]

 1 MR Diagnostic Device 2 Magnet 3 Outer Coil for Gradient Magnetic Field 4 Inner Coil for Gradient Magnetic Field 5 Body Coil Part 6 Bridge Part 7 Bridge Support 10 Bridge Integrated Body Coil 20 Sound Absorbing Material

Claims (1)

[Scope of utility model registration request] 1. A bridge-integrated body coil, wherein a body coil of an MR diagnostic apparatus is integrated with a bridge.