Parallel emitting and receiving radio-frequency interface circuit and phased array emitting and receiving head coil

Abstract

The invention relates to a parallel emitting and receiving radio-frequency interface circuit and a phased array emitting and receiving head coil. The phased array emitting and receiving head coil comprises an outer shell and an inner shell with two through ends, wherein the inner shell and the outer shell are both provided with full-open viewing windows corresponding to the positions of eyes of atester; and the outer surface of the inner shell is provided with eight phased array surface loops distributed in an upper ring and a lower ring, wherein the phased array surface loops are arranged around the full-open viewing windows. The parallel emitting and receiving radio-frequency interface circuit comprises a power divider, the power divider is connected with eight phase shifters; each phase shifter carries out linear phase shift on each input radio-frequency signal, and each input radio-frequency signal subjected to the linear phase shift is emitted to the eight phased array surface loops of the phased array emitting and receiving head coil through the input / output end of an emitting and receiving change-over switch; the eight phased array surface loops emit radio-frequency signals and receive human body hydrogen atoms to generate eight magnetic resonance signals, and the eight magnetic resonance signals are respectively input to a preamplifier through the input / output end of each emitting and receiving change-over switch; and the control end of each emitting and receiving change-over switch is connected with a control system of a scanner. The invention can be widely used for various magnetic resonance high-field imaging systems and especially for ultrahigh-field imaging systems.

Description

technical field [0001] The invention relates to a magnetic resonance high-field and ultra-high-field imaging system, in particular to a parallel transmitting and receiving radio frequency interface circuit and a phased array transmitting and receiving head coil suitable for the magnetic resonance high-field and ultra-high-field imaging system. Background technique [0002] Magnetic resonance imaging technology has developed rapidly in the past ten years. It has not only become an indispensable tool for clinical medical diagnosis, but also an "astronomical telescope" or "microscope" for directly observing the cognitive activities of the brain, which has completely changed the relationship between the brain and cognition. The face of research in the field of knowledge science. The main bottleneck restricting the development of magnetic resonance technology is the image signal-to-noise ratio, resolution and imaging speed. At present, the main way to solve this problem is to in...

AI Technical Summary

Problems solved by technology

Although the high-field and ultra-high-field whole-body magnetic resonance systems have such outstanding capabilities, there are still many technical problems to be solved in order to give full play to their functions. Inhomogeneity, which affects the image signal-to-noise ratio of the magnetic resonance imaging system, excessive absorption of electromagnetic energy by the human body, that is, high SAR value, high difficulty of static magnetic field shimming, etc.

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