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Test method for gradient strength and gradient switching rate of magnetic resonance system

A technology of gradient strength and testing method, which is applied in the medical field, can solve the problems of large difference in maximum current multiples and large test errors, etc., and achieve the effects of simplifying the test operation process, convenient testing, and high testing accuracy

Inactive Publication Date: 2016-06-29
山东汇影互联科技有限公司
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Problems solved by technology

However, due to the large difference between the test current, the gradient current and the maximum current, there will be a relatively large deviation in the linear model fitting, which makes the test error of the above method large.

Method used

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  • Test method for gradient strength and gradient switching rate of magnetic resonance system
  • Test method for gradient strength and gradient switching rate of magnetic resonance system
  • Test method for gradient strength and gradient switching rate of magnetic resonance system

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Embodiment Construction

[0048] In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the present invention.

[0049] In order to provide a thorough understanding of the present invention, the detailed structure will be set forth in the following description. It is evident that the practice of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

[0050] figure 1 It is a flowchart of a method for testing gradient strength of a magnetic resonance system according to...

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Abstract

The invention discloses a testing method for gradient strength and gradient switching rate of a magnetic resonance system. The testing method for the gradient strength comprises the steps of setting at least one direction of a frequency encoding direction, a phase direction and a layer selection direction to be a direction to be tested; scanning an objected to be scanned by using a scanning sequence, wherein the scanning sequence comprises the gradient in at least one direction to obtain the size of an imaging vision field in the at least one direction; and obtaining the gradient strength in the direction to be tested by using the size of the imaging vision field. The testing method has the advantages that since the existing system is used and additional testing equipment and tools are not added, the testing operation flow is simplified and the testing cost is reduced; the testing is convenient, simple and quick to perform and the operability is high; and since constant current is not required to be applied for a long time, the overload problem of a coil and a power amplifier is not required to be considered and larger current can be directly applied for testing, the testing accuracy is higher.

Description

technical field [0001] The invention relates to the medical field, in particular to a method for testing the gradient strength of a magnetic resonance system. In addition, the invention also relates to a testing method of the gradient switching rate of the magnetic resonance system. Background technique [0002] In the development and use of the magnetic resonance system, it is necessary to test and calibrate the strength of the gradient magnetic field (ie, the gradient strength) and the switching speed of the gradient magnetic field (ie, the gradient switching rate). [0003] The gradient magnetic field is amplified by the gradient amplifier in the magnetic resonance system, and the amplified output is passed through the gradient coil to form a time-varying magnetic field with spatial intensity and gradient linear distribution in the scanning area, which is used to realize magnetic resonance imaging. space encoding. [0004] At present, in order to test the gradient stren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/38
Inventor 刘弢
Owner 山东汇影互联科技有限公司
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