Flexible surface coils for use in nuclear magnetic resonance imaging

• US 5,435,302 A
• Filed: 09/22/1993
• Issued: 07/25/1995
• Est. Priority Date: 09/09/1988
• Status: Expired due to Fees

• Current Assignee: Trustees Of The University Of Pennsylvania (University of Pennsylvania)
• Original Assignee: Medrad Incorporated (Bayer AG), Trustees Of The University Of Pennsylvania (University of Pennsylvania)
• Inventors: Lenkinski, Robert E., Kressel, Herbert Y.
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): Casler, Brian L.
• Application Number:
  US08/124,847
• Time in Patent Office: 671 Days
• Field of Search: 128/653.2, 128/653.5, 324/309, 324/318, 324/322, 600/9, 600/10, 600/13-15
• US Class Current: 600/422
• CPC Class Codes: G01R 33/34 Constructional details, e.g. resonators , specially adapted to MR
• CPC Class Codes: G01R 33/34084 implantable coils or coils being geometrically adaptable to the sample, e.g. flexible coils or coils comprising mutually movable parts
• CPC Class Codes: G01R 33/341 comprising surface coils
• CPC Class Codes: G01R 33/3628 Tuning/matching of the transmit/receive coil

Abstract

Flexible, conforming surface coils for use in nuclear magnetic resonance (NMR) imaging are disclosed. The coils comprise a flexible outer body with antennas disposed within the body. The coils closely adopt the contours and shapes of the particular part of the patient'"'"'s body under observation and provide considerable comfort. Since the coils closely conform to the patient, detection of artifacts and aliasing is minimized thus providing highly resolved images of the area of the patient that is being examined. The coils are readily utilized with preexisting NMR magnets and support equipment thereby allowing efficient and cost effective NMR imaging.

Claims

1. A coil assembly for detecting electromagnetic radiation emitted from a patient, comprising:

a flexible outer body portion which conforms to the contours of an area of the patient'"'"'s anatomy and is permeable to electromagnetic radiation emitted from the patient;

a flexible coil disposed within said flexible outer body portion for receiving electromagnetic radiation emitted from the patient, said flexible coil also conforming to the contours of said area of the patient'"'"'s anatomy;

means for holding said flexible outer body portion and coil against said area of the patient'"'"'s anatomy; and

means for connecting said coil through said flexible outer body portion so as to relay a signal representing received electromagnetic radiation to an exterior of said flexible outer body portion,

wherein said flexible outer body portion has a shape which conforms to a patient'"'"'s neck region, and comprises a pair of flexible half shells connected by a hinge so as to accommodate patients having necks of different sizes.

2. A coil assembly as in claim 1, wherein said coil comprises at least one of copper, silver, gold and aluminum.

3. A coil assembly as in claim 1, wherein said coil further comprises a plurality of capacitors for tuning said coil to a desired frequency.

4. A coil assembly as in claim 1, wherein said means for holding comprises at least one adjustable securing strap.

5. A coil assembly as in claim 1, wherein said holding means comprises fastening panels which fasten together to close said flexible half shells.

6. A coil assembly as in claim 1, wherein said hinge is made of plastic.

7. A coil assembly as in claim 1, wherein said flexible outer body portion is formed of at least one of polyurethane and polyvinylchloride.

8. A coil assembly for detecting electromagnetic radiation emitted from a patient, comprising:

a flexible outer body portion which conforms to the contours of the neck of a patient and is permeable to electromagnetic radiation emitted from the patent;

a flexible coil disposed within said flexible outer body portion for receiving electromagnetic radiation emitted from the neck of the patient, said flexible coil also conforming to the contours of the neck of the patient;

means for holding said flexible outer body portion and coil about the neck of the patient; and

means for connecting said coil through said flexible outer body portion so as to relay a signal representing received electromagnetic radiation to an exterior of said flexible outer body portion;

wherein said flexible outer body portion comprises a pair of flexible half shells connected by a hinge so as to accommodate patients having necks of different sizes.

9. A coil assembly as in claim 8, wherein said holding means comprises fastening panels which fasten together to close said flexible half shells.

10. A coil assembly as in claim 8, wherein said hinge is made of plastic.

11. A coil assembly as in claim 8, wherein said coil further comprises a plurality of capacitors for tuning said coil to a desired frequency.

12. A coil assembly as in claim 8, wherein said flexible outer body portion is formed of at least one of polyurethane and polyvinylchloride.

13. A coil as in claim 8, wherein said coil comprises at least one of copper, silver, gold, and aluminum.