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Signal receiving system based on phased array surface coil internal switching technology

A surface coil and signal receiving technology, which is applied in medical science, sensors, diagnostic recording/measurement, etc., can solve the problems of not being able to meet the scanning requirements and reduce the speed of parallel imaging, and achieve the reduction of the loss of signal-to-noise ratio and the speed of parallel imaging The effect of reducing and saving space

Active Publication Date: 2016-03-02
ALLTECH MEDICAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For the first method, it is only applicable when the number of units of all coils is less than or equal to the number of transmission cables of the hospital bed. When the number of coil units used is greater than the number of cables of the transmission system of the hospital bed, this method cannot meet the scanning requirements
[0008] For the second method, although the number of coil units is greater than the number of output channels and hospital bed transmission channels, it will make the signal-to-noise ratio of the synthesized channel image lower than that of these channels without synthesis within the same imaging range (FOV). The signal-to-noise ratio of the image at the same time, and will cause the reduction of parallel imaging speed

Method used

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  • Signal receiving system based on phased array surface coil internal switching technology
  • Signal receiving system based on phased array surface coil internal switching technology
  • Signal receiving system based on phased array surface coil internal switching technology

Examples

Experimental program
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Embodiment 1

[0024] Embodiment 1: Two coil units in a certain column and two coil units in the corresponding column can be selected as a switching pair (for example, An&Bn and An'&Bn' are a switching pair, and Cn&Dn and Cn'&Dn' are a switching pair) .

[0025] In actual application, the number of rows of the coil array may be even or odd. When it is even, the way to select the switching pair is as above. When the number of rows is odd, one row can be output as an independent receiving channel according to the situation. , for the rest of the coil units, the switching pair can still be selected in the above way;

[0026] For the column direction (Z direction), since the number of columns may also be odd, there are coil units that do not participate in the switching pair, and one of the coil units in one column can be output as an independent receiving channel;

[0027] In general, the number of coils in each column of the coil array is 3 or 4, and the selection method of the switching pair...

Embodiment 2

[0037] In this embodiment, the switching pair includes 6 coil units, that is, three coil units in a certain column in the coil array and three coil units in the corresponding column are selected as switching pairs (such as An&Bn&Cn and An'&Bn'&Cn' are a switching pair). In general applications, the number of coils in each column of the coil array is 3 or 4. In this embodiment, the selection of switching pairs is shown in Table 3 below:

[0038] Table three: the switching pair selection table (for embodiment 2) when the number of coil units in each column is 3 or 4

[0039]

[0040]

[0041] In this example, the specific structural diagram of the switching pair is as follows: image 3 As shown, the coil unit An (the first coil unit) and the coil unit An' (the fourth coil unit) which cannot be applied at the same time share channel 1, and the coil unit Bn (the second coil unit) and the coils which cannot be applied at the same time Unit Bn' (fifth coil unit) shares chann...

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Abstract

The invention relates to the field of magnetic resonance imaging, and discloses a signal receiving system based on a phased array surface coil internal switching technology, which reduces the output channel of a coil unit while meeting scanning requirements, reduces cost and saves space. The present invention adopts the connection mode of switching pairs, and any clinically impossible coil units that can be used at the same time share a system cable. Through the switching signal control of the system control unit, only the coil units within the scanning field of view are selected to work at the same time. Detuning the corresponding switching coil unit outside the scanning field of view, so as to complete the entire large-scale array coil scanning application, thereby reducing the output channel of the coil unit while meeting the scanning requirements, thereby reducing cost and saving space ; In addition, since the coil signal receiving process does not need to carry out signal synthesis, it will not cause the loss of image signal-to-noise ratio and the reduction of imaging speed. The invention is beneficial to the convenient realization of whole-body imaging technology, and is suitable for all array coils with large coverage, especially the scanning imaging of spine coils, large blood vessel coils and large abdominal coils.

Description

technical field [0001] The invention relates to the field of magnetic resonance imaging, in particular to a signal receiving system based on phased array surface coil internal switching technology. Background technique [0002] With the rapid development of magnetic resonance (MR) imaging technology, the radio frequency coil technology that is essential in the magnetic resonance imaging technology has also made great progress. The phased array surface coil as the receiving coil is widely used in scanning various parts of the human body, such as the abdomen and spine. For a specific coil, under the condition of a certain image scanning field of view (FOV), the more channels the coil unit has, the shorter the scanning time will be. With the improvement of image quality requirements and the demand for whole-body imaging, the number of units of phased array surface coils is increasing, which requires an increase in the output cable channels of the RF coils and the corresponding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055
Inventor M.伯尔王子溶李建中
Owner ALLTECH MEDICAL SYST
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