Abstract:As the current mainstream medical imaging equipment, superconducting magnetic resonance apparatus plays an important role in clinical diagnosis and patient examination. The imaging quality of the superconducting magnetic resonance apparatus directly depends on the uniformity of the central spherical imaging area (DSV) of the main magnetic field. Shimming technology is particularly important as a technology to achieve uniform DSV magnetic field. Aiming at the shortcomings of inaccurate probe position movement, cumbersome data recording and complicated operation process in traditional methods of Magnetic Resonance Imaging System (DSV) magnetic field measurement, a new DSV magnetic field measurement system based on Labview was designed: Gaussmeter instrument control was designed by designing a Labview control program. Divide the measurement points of the spherical surface of DSV, adjust the measurement device to accurately move the position of the probe, compile the serial communication and data acquisition program, improve the human-computer interaction interface, and realize the real-time collection of the magnetic field data of the DSV surface measurement point without manual recording. Exporting data to a TXT file saves the magnetic field data to the local. The actual application of the project, the operation is convenient, the measured DSV uniformity is 416.0506ppm, after the shimming uniformity by the linear programming algorithm: 16.03383ppm, increased by more than 96%.
