Method and device for positioning magnetic foreign body, and magnetic resonance device
A positioning method and technology for a positioning device are applied in the direction of magnetic resonance measurement, etc., which can solve the problems of the basic magnetic field uniformity destruction of the magnetic resonance device, affecting the imaging quality of the magnetic resonance device, and spending a lot of time, so as to reduce the workload and improve the utilization rate. Efficiency, the effect of avoiding search work
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[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.
[0028] figure 1 A flow chart of the magnetic foreign body positioning method involved in the present invention is shown. In this embodiment, a magnetic resonance imaging apparatus is taken as an example for description.
[0029] In applying the method for locating magnetic foreign objects of the present invention, it is first necessary to measure the initial magnetic field without magnetic foreign objects in the magnet in advance, and store the measured coefficients of the first spherical harmonic function representing the initial magnetic field in the database (step S101) . Specifically, in this embodiment, the initial magnetic field OriField under the condition that no magnetic foreign matter exists in the magnetic resonance imaging apparatus is measured. The measurement of the init...
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