Gradient Coil Design Method Combining Functional Function and Simulated Annealing Algorithm

A simulated annealing algorithm, gradient coil technology, applied in computing, special data processing applications, measurement devices, etc., can solve the problem that the performance of the gradient coil cannot be optimized.
CN104007407BInactive Publication Date: 2016-08-24HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2016-08-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a gradient coil design method combining functional and simulated annealing algorithm, which is characterized in that it includes the following steps: step 1: constructing the basis function of the flow function according to the skeleton shape of the gradient coil; step 2: according to the preset parameters Construct the functional, and solve the extremum of the functional to obtain the current density distribution; Step 3: Construct the objective function for the actual coil structure, and further optimize the initial solution obtained by solving the extremum of the functional using the simulated annealing algorithm, and the obtained The results are used as the basis for the final gradient coil wiring. The invention is much more efficient than only using the simulated annealing algorithm, and can guarantee to search for the global optimal solution, and improve the performance of the designed gradient coil. This design scheme is suitable for any gradient coil type designed using the flow function method.
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Description

technical field

[0001] The invention relates to a gradient coil design method, in particular to a gradient coil design method combining functional and simulated annealing algorithms in a nuclear magnetic resonance imaging system. The invention belongs to the field of nuclear magnetic resonance imaging system component design. Background technique

[0002] The gradient coil is one of the key components of the MRI system, and its main function is to provide the MRI system with alternating gradient magnetic fields in three orthogonal directions, so as to realize the spatial positioning of the imaged object. The structure of the gradient coil mainly includes two types: closed type and open type.

[0003] The shape of the open gradient coil is a planar structure, and the shape of the closed gradient coil is generally a cylindrical structure. At present, in the NMR system based on permanent magnets, open gradient coils are mostly used. In superconducting NMR systems, closed gra...

Claims

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