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Signal receiving system based on phased array surface coil inner 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 parallel imaging speed, and achieve the reduction of the loss of the signal-to-noise ratio and the parallel imaging speed The effect of reducing and reducing costs

Active Publication Date: 2014-04-30
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 problem that the number of coil units is greater than the number of output channels and hospital bed transmission channels is solved, it will make the signal-to-noise ratio of the synthetic 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 inner switching technology
  • Signal receiving system based on phased array surface coil inner switching technology
  • Signal receiving system based on phased array surface coil inner 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 column of coil units 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 is shown i...

Embodiment 2

[0037] In this embodiment, the switching pair includes 6 coil units, that is, the three coil units in a certain column in the coil array and the 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 3: Switching pair selection table when the number of coil units in each column is 3 or 4 (for embodiment 2)

[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 inner switching technology. Scanning requirements are met, meanwhile, output channels of a coil unit are reduced, cost is lowered, and space is saved. According to the system, a switching pair connecting mode is used, coil units which cannot be used at the same time freely and clinically share one system cable, through signal switching control of a system control unit, a coil unit in a scanning view field is selected for working at the same time, the coil unit and a corresponding coil unit outside the scanning view field are subjected to detuning, accordingly, whole large-range array coil scanning application is completed, so that the scanning requirements are met, meanwhile, the output channels of the coil unit are reduced, therefore, cost is lowered, space is saved, in addition, signal synthesis is of no need during a coil signal receiving process, loss of the signal to noise ratio of images can be avoided, and imaging speed cannot be lowered. According to the system, a whole body imaging technology can be well achieved conveniently, and the system is suitable for scanning imaging of array coils with large covering ranges, especially a spine coil, a large vessel coil and a large abdomen coil.

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 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 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 RF channels containe...

Claims

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Application Information

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