Flexible and Wearable Radio Frequency Coil Garments for Magnetic Resonance Imaging

• US 20080204021A1
• Filed: 06/02/2005
• Published: 08/28/2008
• Est. Priority Date: 06/17/2004
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Graesslin, Ingmar, Carlon, John T., Leussler, Christoph G., Buurman, Hans
• Application Number:
  US11/570,507
• Publication Number:
  US 20080204021A1
• Time in Patent Office: Days
• 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 33/34084 implantable coils or coils being geometrically adaptable to the sample, e.g. flexible coils or coils comprising mutually movable parts
• CPC Class Codes: G01R 33/3415 comprising arrays of sub-coils , i.e. phased-array coils with flexible receiver channels

Abstract

A radio frequency apparatus for at least one of (i) receiving and (ii) exciting a magnetic resonance signal includes an item of clothing (102, 202). The item of clothing includes one or more layers (110, 112, 120, 122, 300, 402) that are stretchable to comport with differently sized and shaped imaging subjects. A plurality of radio frequency coils (104, 114, 204, 206, 208, 302, 404) are attached to one or more layers of the item of clothing. The coils are relatively movable with respect to one another responsive to stretching of the stretchable item of clothing. The one or more layers of the item of clothing include an anti-microbial agent (92, 92′, 94′) disposed on or incorporated into at least one layer.

Claims

1. A radio frequency apparatus for at least one of (i) receiving and (ii) exciting a magnetic resonance signal, the apparatus comprising:

an item of clothing comprising one or more layers that are stretchable to comport with differently sized and shaped imaging subjects; and

a plurality of radio frequency coils attached to one or more layers of the item of clothing, the coils being relatively movable with respect to one another responsive to stretching of the stretchable layers.

2. The radio frequency apparatus as set forth in claim 1, wherein the radio frequency coils are generally flexible planar coils in which the plane of the coil lies generally parallel to the layer or layers to which the coil is attached.

3. The radio frequency apparatus as set forth in claim 1, wherein each radio frequency coil includes:

a printed circuit board lying generally parallel to the layer or layers to which the coil is attached, the printed circuit board including a printed circuit defining a radio frequency antenna.

4. The radio frequency apparatus as set forth in claim 1, wherein the plurality of radio frequency coils include:

a plurality of first radio frequency coils attached to the item of clothing, the first radio frequency coils having a first coil size or characteristic; and

a plurality of second radio frequency coils attached to the item of clothing, the second radio frequency coils having a second coil size or characteristic.

5. The radio frequency apparatus as set forth in claim 4, wherein the first coil size or characteristic is different from the second coil size or characteristic.

6. The radio frequency apparatus as set forth in claim 4, wherein (i) the plurality of first radio frequency coils are attached to a first stretchable layer, and (ii) the plurality of second radio frequency coils are attached to a second stretchable layer different from the first stretchable layer.

7. The radio frequency apparatus as set forth in claim 4, wherein the apparatus further includes:

a means for selectively employing one of (i) the plurality of first radio frequency coils and (ii) the plurality of second radio frequency coils for receiving the magnetic resonance signal.

8. The radio frequency apparatus as set forth in claim 1, wherein the plurality of radio frequency coils include:

a plurality of flexible conductive wires woven into the one or more stretchable layers of the item of clothing, the flexible conductive wires defining a plurality of radio frequency antennas.

9. The radio frequency apparatus as set forth in claim 1, wherein the item of clothing is selected from a group consisting of a shirt, a vest, pants or trousers, a sock, a glove, a mitten, a jump-suit, and a cap.

10. The radio frequency apparatus as set forth in claim 1, further including:

an anti-microbial agent disposed on or in one or more of the layers of the item of clothing.

11. The radio frequency apparatus as set forth in claim 1, wherein the item of clothing further includes:

at least one layer formed of fibers incorporating or coated with an anti-microbial agent.

12. The radio frequency apparatus as set forth in claim 1, wherein the item of clothing further includes:

at least one layer formed of an expanded PTFE material incorporating or coated with an anti-microbial agent.

13. The radio frequency apparatus as set forth in claim 1, wherein the layers of the item of clothing include:

at least one water-resistant layer insulating the plurality of radio frequency coils.

14. The radio frequency apparatus as set forth in claim 1, further including:

two or more items of clothing each including a plurality of radio frequency coils, the coils of the two or more items of clothing being coupled together to define a combined coil array.

15. The radio frequency apparatus as set forth in claim 1, further including:

an electronic identification tag attached to the item of clothing.

16. The radio frequency apparatus as set forth in claim 1, wherein the layers of the item of clothing include:

an inflatable layer, the plurality of radio frequency coils being disposed in or on the inflatable layer and substantially conforming to a pre-selected geometry responsive to inflation of the inflatable layer.

17. The radio frequency apparatus as set forth in claim 1, wherein the plurality of radio frequency coils attached to one or more layers of the item of clothing include at least one radio frequency transmit coil for exciting magnetic resonance and a plurality of radio frequency receive coils for receiving the excited magnetic resonance.

18. A radio frequency apparatus for at least one of (i) receiving and (ii) exciting a magnetic resonance signal, the apparatus comprising:

at least one radio frequency antenna; and

a structure disposed on or around the at least one radio frequency antenna, the structure including an anti-microbial agent disposed on or incorporated into the structure.

19. The radio frequency apparatus as set forth in claim 18, wherein the structure comprises:

one or more clothing layers defining an item of clothing, the clothing layers being stretchable to comport with differently sized and shaped imaging subjects.

20. The radio frequency apparatus as set forth in claim 19, wherein the each radio frequency antenna comprises:

one or more printed circuit boards, the at least one radio frequency antenna being defined by printed circuitry of the one or more printed circuit boards, the one or more printed circuit boards being attached to at least one clothing layer.

21. The radio frequency apparatus as set forth in claim 19, wherein the one or more clothing layers comprise:

a water resistant layer insulating the at least one radio frequency antenna, the anti-microbial agent being disposed on or incorporated into the water resistant layer.

22. The radio frequency apparatus as set forth in claim 19, wherein the one or more layers include:

an inflatable layer surrounding an imaging subject imaged by the at least one radio frequency antenna, the at least one radio frequency antenna being disposed in or on the inflatable layer and assuming a selected position relative to the imaging subject responsive to inflation of the inflatable layer.

23. A magnetic resonance imaging scanner for imaging an imaging subject, the scanner comprising:

a main magnet generating a substantially spatially and temporally constant magnetic field in an examination region, the main magnet being housed in a gantry;

magnetic field gradient coils housed in the gantry and generating selected magnetic field gradients in the examination region;

a subject support for supporting the subject in the examination region;

at least one radio frequency coil arranged proximate to the imaging subject in the examination region;

an operator control contacted by an associated scanner operator; and

an anti-microbial agent disposed on or incorporated into at least one of (i) the at least one radio frequency coil, (ii) the gantry, (iii) the subject support) and (iv) the operator control.