High frequency coil for an NMR apparatus

• US 4,728,894 A
• Filed: 03/21/1985
• Issued: 03/01/1988
• Est. Priority Date: 04/23/1984
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Yoda, Kiyoshi, Yamada, Tadatoshi, Fujimura, Satoshi
• Primary Examiner(s): Tokar, Michael J.
• Assistant Examiner(s): Jaworski, Francis J.
• Application Number:
  US06/714,218
• Time in Patent Office: 1,076 Days
• Field of Search: 174/152 A, 324/309, 324/318-319, 324/322, 336/199, 336/205-207, 336/225-227, 343/741-744, 343/871, 343/880
• US Class Current: 324/318
• CPC Class Codes: G01R 33/34007 Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
• CPC Class Codes: G01R 33/34069 Saddle coils

Abstract

A high frequency coil for nuclear magnetic resonance comprises a saddle coil formed by interposing electric insulator members between adjacent ones of a plurality of metal straps. The metal straps are copper straps, and the electric insulator members are capacitors or air gaps.

Claims

1. A high frequency coil for a nuclear magnetic resonance apparatus comprising:

a saddle coil including a plurality of belt-shaped metal sheets, each having end portions, the plurality of metal sheets being arranged serially with an end portion of one metal sheet being disposed adjacent to an end portion of the next metal sheet so as to form the saddle coil, the saddle coil further including electric insulator means for reducing the impedance of the coil, the electric insulator means being interposed between adjacent end portions of said belt-shaped metal sheets.

2. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 1 wherein said metal sheets are belt-shaped copper sheets.

3. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 1 wherein said electric insulator means are solids.

4. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 3 wherein said electric insulator means are capacitors.

5. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 4 wherein said capacitors are secured to said metal sheets by soldering.

6. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 3 wherein said electric insulator means are acrylic resin members.

7. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 6 wherein said acrylic resin members are secured to said metal sheets with an epoxy adhesive.

8. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 1 wherein said electric insulator members are gaseous.

9. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 8 wherein said electric insulator means are spaces of air.

10. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 9 wherein said spaces of air are gaps provided between adjacent metal sheets.

11. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 2 wherein said electric insulator means are solids.

12. A high frequency coil for a nuclear magnetic resonance apparatus as defined in claim 2 wherein said electric insulator means are gaseous.