Method for synthesis and reconstruction of output signal of quadrature coil of MRI (magnetic resonance imaging) system

Abstract

The present invention relates to a method for synthesis and reconstruction of output signals of a quadrature coil of an MRI (magnetic resonance imaging) system, which is characterized by comprising the following steps: 1, collecting two paths of output signals of the quadrature coil of the MRI system; 2, screening the original output signals S1 and S2 of the path I and the path Q of the quadrature coil and eliminating gain overflow layers; 2, analyzing first signals and finding out the position of maximum signal data in the first signals; 4, finding out the range of full width at half maximum of signal data with a maximum magnitude in the first signals; 5, respectively calculating phase differences of the signal data of the first signals and second signals at each point within the range of the full width at half maximum obtained in the further step, and averaging the phase differences to obtain a final phase difference; and 6, obtaining a final image through synthesizing and reconstructing the original output signals of the path I and the original output signals of the path Q by adopting the final phase difference obtained in the fifth step. Compared with the prior art, the image synthesized and reconstructed in the method has ideal quality.

Description

technical field [0001] The invention relates to a method for synthesizing and reconstructing output signals of quadrature coils in an MRI system. Background technique [0002] Magnetic Resonance Imaging (MRI for short) is a high-tech in medical imaging. It uses magnetic field and radio frequency pulses to make hydrogen nuclear resonance in the living body generate signals, which are processed by computer to form images. Since it came out in the 1970s, MRI technology has developed rapidly. Due to its high resolution, multiple imaging parameters, tomographic imaging at any level, and no ionizing radiation, it has become one of the most advanced tools in imaging examinations. Widely used in clinical examination of various systems of the human body. In 2003, Paul C. Lauterbur and Peter Mansfield, who invented magnetic resonance imaging, were awarded the Nobel Prize in Physiology or Medicine. [0003] When quadrature coils are used to improve the performance of the receiving ch...

AI Technical Summary

Problems solved by technology

This method is relatively rigid. When the actual phase difference between the two signals does not reach or exceed 90 degrees, the best composite effect cannot be obtained.

Images