MR method utilizing microcoils situated in the examination zone
First Claim
Patent Images
1. An MR method comprising:
- exciting nuclear magnetization in an object to be examined and present in an examination zone by at least one magnetic RF pulse having a central frequency, receiving MR signals subsequently by an MR coil, forming at least one MR image, and introducing at least one microcoil, tuned to the central frequency, into the object to be examined, wherein the microcoil has no connection leads, and wherein the MR signals are processed in such a manner that the local variation, induced by the microcoil, of the magnetic field which occurs in the object to be examined due to the RF pulses becomes visible in the MR image.
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Abstract
The invention relates to an MR method which utilizes a microcoil without connection leads which causes an increase of or a change in phase of an external RF magnetic field in its direct vicinity within an object to be examined. This increase can be used to localize the coil, to image the direct vicinity, or to track the propagation of a liquid flow passing through the direct vicinity.
108 Citations
9 Claims
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1. An MR method comprising:
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exciting nuclear magnetization in an object to be examined and present in an examination zone by at least one magnetic RF pulse having a central frequency, receiving MR signals subsequently by an MR coil, forming at least one MR image, and introducing at least one microcoil, tuned to the central frequency, into the object to be examined, wherein the microcoil has no connection leads, and wherein the MR signals are processed in such a manner that the local variation, induced by the microcoil, of the magnetic field which occurs in the object to be examined due to the RF pulses becomes visible in the MR image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An MR device comprising:
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a magnet for generating a uniform, steady main magnetic field in an examination zone, an RF coil system for generating magnetic RF pulses and for receiving MR signals from an object to be examined which is present in the examination zone, a microcoil having no connection leads and introduced into the object, and an image reconstruction unit for the reconstruction of MR images, so that the MR signals are processed in such a manner that local variation, induced by the microcoil without connection leads, of the magnetic field which occurs in the object to be examined due to the RF pulses becomes visible in the MR image.
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Specification