Magnetic resonance imaging system and its gradient amplifier drive circuit, test system
A gradient amplifier and drive circuit technology, applied in the field of medical imaging, can solve problems such as unfavorable testing and maintenance, unfavorable fault judgment and fault location, and other circuit induced interference, so as to shorten maintenance time, improve maintenance efficiency, and save manpower.
Active Publication Date: 2019-11-05
深圳市正祥医疗科技有限公司
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Problems solved by technology
Since the upper and lower or front and rear circuits are inseparable, it often induces and interferes with other circuits at this time, which is not conducive to fault judgment and fault location. In short, this integrated structure is not conducive to testing and maintenance.
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[0038] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.
[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simpli...
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The invention discloses an NMR imaging system, a gradient amplifier drive circuit thereof and a testing system. The gradient amplifier drive circuit comprises a DC-DC conversion circuit and a signal amplification drive circuit which is connected to the DC-DC conversion circuit. The signal amplification drive circuit comprises an input interface for inputting a gradient echo pulse and an output interface for outputting a secondary signal obtained through processing. In this way, when a gradient amplifier is failed, in a general case, a failure is the burning of the gradient amplifier caused by large power device explosion and the breakdown of a corresponding drive circuit, at that time the signal amplification drive circuit can be individually led out of a cabinet correspondingly through an interface, a power supply, a signal generator and a load are added to a tool to carry out a failure repair test, which is convenient and fast, the manpower is saved, and the maintenance time is shortened.
Description
technical field [0001] The application relates to the field of medical imaging, in particular to a nuclear magnetic resonance imaging system and its gradient amplifier driving circuit and test system. Background technique [0002] The gradient amplifier is one of the core devices of the MRI (Magnetic Resonance Imaging, MRI) system. It is mainly responsible for supplying power to the gradient coil, so that the gradient coil generates a linearly transformed gradient magnetic field in the imaging space, making the imaging area different from each other. , to achieve magnetic field space encoding, in order to obtain high-quality images, the gradient amplifier is required to provide high-precision and transformed current pulses to the inductive load. [0003] During the operation and use of MRI, high-power equipment such as gradient amplifiers is one of the equipment with the highest failure rate. Since it is responsible for supplying power to the gradient coil, it works in the s...
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IPC IPC(8): G01R33/385H03F3/20H03F1/52A61B5/055
CPCA61B5/055G01R33/3852H03F1/52H03F3/20
Inventor 沈育林王松
Owner 深圳市正祥医疗科技有限公司