Method and system of scaling MR spectroscopic data acquired with phased-array coils
AssigneeGeneral Electric Company
InventorTimo Schirmer
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Abstract
The present invention is directed to a system and method of resealing spectroscopic data acquired with phased-array or surface coils to absolute “local” units and, hence, preserves the industry-desirable quantitative approach to single voxel MRS. An MRS signal is acquired from water using a body coil and is used as a reference signal to scale MR spectroscopic data acquired with a plurality of RF receive coils, i.e. phased-array or surface coils. In the resealing process, the amplitude of water in the MRS data will be set to match the amplitude of the water reference signal.
Claims20
A method of MR spectroscopy (MRS) comprising the steps of:
- acquiring a reference signal with a body coil;
- acquiring metabolite signals with a plurality of receive coils;
- combining the metabolite signals to form a single MRS spectrum;
- and
- scaling the single MRS spectrum as a function of intensity of the reference signal.
An MRS apparatus comprising:
- a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet to impress a polarizing magnetic field and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MRS data, the RF coil assembly having phased array coils and a body coil;
- and
- a computer programmed to scale a composite signal of metabolite signals acquired with the phased array coils based on a reference signal acquired with the body coil.
A computer readable storage medium having a computer program stored thereon to perform an MRS exam and representing a set of instructions that when executed by a computer causes the computer to:
- acquire unsuppressed MRS water signal with a transmit and receiver coil;
- acquire MRS metabolite signals from a plurality of receive coils;
- combine the MRS metabolite signals to form an MRS composite spectrum;
- and
- scale the MRS composite spectrum to an intensity of the unsuppressed MRS water signal.
Dependencies are inferred from the claim text.