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Magnetic resonance imaging system and method

A magnetic resonance imaging and coil technology, which is applied in magnetic resonance measurement, measurement of magnetic variables, measurement devices, etc., can solve the problems of image quality influence and weakening, and achieve the effect of insensitivity to time changes.

Inactive Publication Date: 2010-01-27
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Variations in the resonant frequency of the coil can impair the ability of the device to excite nuclei in the material being imaged (e.g., due to a mismatch between the resonant frequency of the coil and the Larmor frequency of the target material) and negatively affect the quality of the resulting image

Method used

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  • Magnetic resonance imaging system and method
  • Magnetic resonance imaging system and method
  • Magnetic resonance imaging system and method

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Embodiment Construction

[0039] A simple embodiment of the present invention is described below. The MRI system 1 includes a plurality of RF coil elements 3 ( figure 1 not shown in; see image 3 ) volume multi-element transmit / receive (or even transmit only) RF coil 2. In particular, the MRI system 1 comprises at least two RF coil elements 3 adapted to acquire magnetic resonance imaging data of the patient's body 4 . Each RF coil element 3 is designed to incorporate an independent second RF coil (pick-up coil) 5 which acts as a measuring element.

[0040] Each pickup coil 5 is physically adjacent to one of the at least two RF coil elements 3 and is adapted to acquire data related to the movement of the patient's body 4 . Several pick-up coils 5 form a pick-up coil array. Each pickup coil 5 is connected to a receiver 5 (detector electronics) for determining the actual (or relative) magnetic field produced by each RF coil element 3 under different loading conditions. The measurement of the voltage ...

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Abstract

The objective of the present invention to provide a MRI technique, in which the influence of physiological factors such as respiration and cardiac pulsation on MRI results is reduced or removed. The object of the present invention is achieved by a magnetic resonance imaging system (1), comprising a first RF coil (2) adapted for acquiring magnetic resonance imaging data of a patient s body; a number of measuring elements (5, 5', 5'', 29, 31), which are sensitive to a load changing of the first RF coil (2), said measuring elements (5, 5', 5'', 29, 31) being adapted for acquiring data related to motion of said patient s body; and a processing unit (9) adapted for employing said motion data to correct for patient motion in magnetic resonance imaging.

Description

technical field [0001] The present invention relates generally to non-invasive imaging applications, and particularly to magnetic resonance imaging (MRI). More particularly, the present invention relates to an imaging technique that employs radio frequency (RF) coils to measure properties of a patient's body being imaged. Background technique [0002] MRI measures various magnetic properties of target materials in a magnetic field. MRI involves aligning the nuclear spins of the imaged material in a substantially uniform magnetic field and perturbing the magnetic field with periodic RF pulses in order to measure nuclear magnetic resonance (NMR) phenomena of the imaged material. To induce the NMR phenomenon, one or more resonant coils are provided that generate RF pulses at a resonant frequency that matches the Larmor frequency of a particular tissue (ie, the rate at which the nuclei precess around the axis) in order to excite the nuclei so that they move along the The direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/58G01R33/36
Inventor P·R·哈维
Owner KONINKLIJKE PHILIPS ELECTRONICS NV