Material for use in a magnetic resonance system, method for producing the material and magnetic resonance system

Patent metadata

Field	Value
Publication number	US-9645208-B2
Application number	US-201313848132-A
Country	US
Kind code	B2
Filing date	Mar 21, 2013
Priority date	Mar 22, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A material for use in a magnetic resonance system includes a carrier material and a doping material. The carrier material and the doping material are admixed in a specific proportion. A volume of the material smaller than 1 mm 2 contains a substantially homogeneous intermixing of the carrier material and the doping material.

First claim

The invention claimed is:

1. A material for use in a magnetic resonance system, the material comprising:
a carrier materials; and
a magnetic doping material which is admixed in a specific proportion with the carrier material for producing the material for use in the magnetic resonance system,
wherein a volume of the material which is smaller than 1 mm 3 contains a substantially homogeneous intermixing of the carrier material and the doping material, and
wherein the material has a T2* relaxation time of nuclear spins in the volume which is reduced by a factor of at least 2 compared to a corresponding T2* relaxation time of the carrier material.

2. The material as claimed in claim 1 , wherein a particle size of the doping material is smaller than approximately 200 μm.

3. The material as claimed in claim 2 , wherein the particle size of the doping material is smaller than approximately 10 μm.

4. The material as claimed in claim 1 , wherein the doping material comprises magnetic nanoparticles and wherein a particle size of the doping material is smaller than approximately 1 μm.

5. The material as claimed in claim 4 , wherein the particle size of the doping material is smaller than approximately 100 nm.

6. The material as claimed in claim 4 , wherein the magnetic nanoparticles are ferromagnetic.

7. The material as claimed in claim 1 , wherein the proportion of the magnetic doping material admixed in the carrier material is in the range of 0.1%-80% by weight or volume.

8. The material as claimed in claim 7 , wherein the proportion of the magnetic doping material admixed in the carrier material is in the range of 1%-20% by weight or volume.

9. The material as claimed in claim 1 , wherein the carrier material is an acrylonitrile butadiene styrene (ABS) plastic.

10. The material as claimed in claim 1 , wherein the carrier material is selected from the group consisting of: thermoplastics, thermoplastic elastomers, elastomers, thermosets, foams.

11. The material as claimed in claim 1 , wherein the doping material is selected from a first group of diamagnetic materials consisting of the elements: graphite, bismuth; or from a second group of paramagnetic materials consisting of the elements: platinum, chromium, tungsten, ferritin.

12. The material as claimed in claim 1 , wherein the material has a macroscopic magnetic susceptibility which is substantially equal to a susceptibility of water or tissue or organic material or air.

13. The material as claimed in claim 1 , wherein the material has a macroscopic magnetic susceptibility which is unequal to at least a susceptibility of water and tissue and organic material and air.

14. The material as claimed in claim 1 , wherein the factor is 4.

15. The material as claimed in claim 1 , wherein the material comprises a magnetic further doping material which is admixed in a further proportion, wherein the volume contains a homogeneous intermixing of the carrier material and the doping material and the further doping material and wherein a preceding sign of a susceptibility of the further doping material is unequal to a preceding sign of a susceptibility of the doping material.

16. The material as claimed in claim 15 , wherein a particle size of the further doping material is smaller than 100 μm.

17. The material as claimed in claim 15 , wherein the proportion and the further proportion are different so that a macroscopic susceptibility is equal to a specific value.

18. A method for producing a material for use in a magnetic resonance system, the method comprising:
melting a carrier material made of plastic via an extruder, and
admixing a proportion of a magnetic doping material with the carrier material for producing the material for use in the magnetic resonance system,
wherein a volume of the material which is smaller than 1 mm 3 contains a homogeneous intermixing of the carrier material with the doping material, and
wherein the material has a T2* relaxation time of nuclear spins in the volume which is reduced by a factor of at least 2 compared to a corresponding T2* relaxation time of the carrier material.

19. A magnetic resonance system with a sensitive range, wherein the magnetic resonance system is set up in order to obtain magnetic resonance data for imaging within the sensitive range, wherein the magnetic resonance system comprises:
components for imaging within the sensitive range,
wherein the components comprise a material comprising a carrier material and a magnetic doping material which is admixed in a proportion with the carrier material,
wherein a volume of the material which is smaller than 1 mm 3 contains a homogeneous intermixing of the carrier material and the doping material, and
wherein the material has a T2* relaxation time of nuclear spins in the volume which is reduced by a factor of at least 2 compared to a corresponding T2* relaxation time of the carrier material.

Assignees

• Biber Stephan
• Candidus Yvonne
• Fischer Hubertus
• Greiner Robert
• Kundner Thomas
• Siemens Ag

Inventors

• Biber Stephan
• Candidus Yvonne
• Fischer Hubertus
• Greiner Robert
• Kundner Thomas

Classifications

• G01R33/38 Primary

  Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field · CPC title

• G01R33/34007

  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 title

• G01N24/08

  by using nuclear magnetic resonance (G01N24/12 takes precedence) · CPC title

• H01F1/0063

  in a non-magnetic matrix, e.g. granular solids (granular films H01F10/007) · CPC title

• H01F1/42

  of organic or organo-metallic materials {, e.g. graphene}(H01F1/44 takes precedence) · CPC title