RF ANTENNA ARRANGEMENT AND METHOD FOR MULTI NUCLEI MR IMAGE RECONSTRUCTION INVOLVING PARALLEL MRI
First Claim
1. A multi nuclei RF antenna arrangement comprising a first antenna for transmitting RF excitation signals for exciting magnetic resonances and/or for receiving MR relaxation signals of/from a first species of nuclei having a first gyromagnetic ratio (γ
-
LO), and a second antenna for transmitting RF excitation signals for exciting magnetic resonances and/or for receiving MR relaxation signals of/from a second species of nuclei having a second gyromagnetic ratio (Γ
HI), wherein the first gyromagnetic ratio (γ
LO) is lower than the second gyromagnetic ratio (γ
HI) and wherein the first antenna has a first number (nLO) of antenna elements and the second antenna has a second number (nHI) of antenna elements, which antenna elements are each resonant to the related Larmor frequency of the first and the second species of nuclei, respectively, wherein the ratio between the second and the first number (nHI/nLO) is approximately equal to or greater than the ratio between the second and the first gyromagnetic ratio (γ
HI/γ
LO).
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Accused Products
Abstract
A multi nuclei RF antenna arrangement for use in a multi nuclei MRI system or an MR scanner, for transmitting RF excitation signals (B1 field) for exciting nuclear magnetic resonances (NMR), and/or for receiving NMR relaxation signals for multi nuclei MR (magnetic resonance) image reconstruction is disclosed, wherein the RF antenna arrangement is tuned to the Larmor frequencies of at least two different species of nuclei having at least two different gyromagnetic rations like 23Na, 39K, 17O and hyper polarized gases like 129Xe or other isotopes having a nuclear spin. Further, a method for reconstructing a multi nuclei MR image especially by means of the above RF antenna arrangement is disclosed. The method involves reducing back-folding artifacts of the species having the higher gyromagnetic ration by parallel MRI reconstruction.
19 Citations
15 Claims
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1. A multi nuclei RF antenna arrangement comprising a first antenna for transmitting RF excitation signals for exciting magnetic resonances and/or for receiving MR relaxation signals of/from a first species of nuclei having a first gyromagnetic ratio (γ
-
LO), and a second antenna for transmitting RF excitation signals for exciting magnetic resonances and/or for receiving MR relaxation signals of/from a second species of nuclei having a second gyromagnetic ratio (Γ
HI), wherein the first gyromagnetic ratio (γ
LO) is lower than the second gyromagnetic ratio (γ
HI) and wherein the first antenna has a first number (nLO) of antenna elements and the second antenna has a second number (nHI) of antenna elements, which antenna elements are each resonant to the related Larmor frequency of the first and the second species of nuclei, respectively, wherein the ratio between the second and the first number (nHI/nLO) is approximately equal to or greater than the ratio between the second and the first gyromagnetic ratio (γ
HI/γ
LO). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
LO), and a second antenna for transmitting RF excitation signals for exciting magnetic resonances and/or for receiving MR relaxation signals of/from a second species of nuclei having a second gyromagnetic ratio (Γ
Specification