METHOD FOR INCREASING THE HOMOGENEITY OF THE RADIO FREQUENCY FIELD OF A MID-FIELD MAGNETIC RESONANCE TOMOGRAPHIC SCANNER AND A COIL FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC A61B5/55 G01R33/341 

FIELD: medical equipment.

SUBSTANCE: group of inventions is related to a method for increasing the homogeneity of the radio frequency field of a sensor of a mid-field magnetic resonance tomographic scanner and a coil for its implementation. The method includes supplying an exciting electrical signal to parallel-connected turns of a radio frequency coil configured to transmit or pick up a signal from the turns of a radio frequency coil configured to receive, in which the exciting signal is applied or removed between the centres of the upper parts of the conductor loops, primarily to the extreme turns of the radio frequency coil or from them. The radio frequency coil of the sensor of a magnetic resonance tomographic scanner is a winding of electrically connected turns parallel to one another located on a hollow frame, oriented orthogonally relative to the longitudinal axis of the frame, distributed evenly. The ends of the turns are connected by conductors having an electrical connection with the equipment of a magnetic resonance tomographic scanner. The conductors are closed in loops on the outer side of the frame in such a way that the lower part of the loop connecting the turns is on the frame, the upper part is separated from it at a distance exceeding the gap between the parallel loops of the connecting conductors by more than 2 times. The conductors are interconnected in the middle of the upper part of the loop by an element for applying or removing a signal. The radio frequency coil of the magnetic resonance tomographic scanner sensor contains a winding of coils electrically connected in parallel to one another, having an electrical connection of conductors with the equipment of the magnetic resonance tomographic scanner and placed on a hollow frame, where the coils are oriented orthogonally relative to the longitudinal axis of the frame. The turns are evenly distributed, the conductors connecting them are closed in loops on the outside of the frame, while the lower part of the loop connecting the turns is on the frame. The upper part is separated from it at a distance exceeding the gap between the parallel loops of the connecting conductors by more than 2 times. The conductors are interconnected in the middle of the upper part of the loop by an element for applying or removing a signal.

EFFECT: optimization of the design of the inventive radio frequency coil of the sensor of a mid-field magnetic resonance tomographic scanner, including the relative position, dimensions and ratio of its elements, as well as a new method for supplying the exciting electrical signal to the turns of the transmitting radio frequency coil connected in parallel or picking up the signal from the turns of the receiving radio frequency coil, which leads to elimination of these shortcomings of analogues and prototype.

5 cl, 5 dwg