Small animal radio frequency coil for clinical super-high field magnetic resonance imaging system

Abstract

The invention discloses a small animal radio frequency coil for a clinical super-high field magnetic resonance imaging system. The small animal radio frequency coil is mainly composed of a single-channel transmitting and receiving integrated antenna and a plurality of receiving antennas. The receiving antennas form multiple channels. All the receiving antennas are distributed on the periphery of the transmitting and receiving integrated antenna in annular arrays and geometrically overlapped with the transmitting and receiving integrated antenna. Through the generation induction, the radio frequency decoupling among the antenna channels is enhanced; the coverage of the transmitting and receiving integrated antenna is smaller than the sum of the coverage of all the receiving antennas, and therefore the signal excitation of the small imaging area is realized; the receiving antennas have the parallel imaging function of the clinical magnetic resonance imaging system, the scanning time canbe easily shortened, and the image quality can be easily improved; the transmitting and receiving integrated antenna and the receiving antennas are all connected with front amplifiers respectively after being connected with a capacitor in series. By means of the coil, the requirement for flexibly placing the coil for imaging of small animals with different sizes can be met.

Description

technical field [0001] The invention relates to the field of ultra-high-field magnetic resonance imaging systems, and specifically designs a small animal radio frequency coil for clinical ultra-high-field magnetic resonance imaging systems. Background technique [0002] The basic principle of magnetic resonance imaging comes from the discovery of American scholars Bloch and Purcell in 1946. Under the action of an external magnetic field, some protons (including hydrogen protons in the human body) that spin around the main magnetic field (external magnetic field) precess in a short time Under the action of the radio frequency wave, the precession angle increases; when the radio frequency wave stops, the protons will gradually return to their original state, and at the same time release the radio frequency signal with the same frequency as the excitation wave. This physical phenomenon is called nuclear magnetic resonance . Magnetic resonance imaging technology uses this princ...

AI Technical Summary

Problems solved by technology

[0006] The technical problems to be solved by the present invention include: customizing the design of a transmitting antenna with high emission efficiency and uniformity; improving the slow imaging speed and resolution caused by the insufficient performance of the gradient system when the clinical magnetic resonance system is used for small animal imaging through special design Issues with low and poor image quality; compatible with diverse animal bodies and loading multimodal imaging setups

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