Gradient coil linearity measurement method and measurement system

• Main Authors: LIU ZHAOQUAN, ZHU XUESONG, XU JIANYI, ZHENG JIE, HE QUN, LI LANKAI, YAO HAIFENG
• Format: Patent
• Language: Chinese; English
• Published: 22.09.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to the technical field of magnetic resonance imaging, in particular to a gradient coil linearity measurement method and system, and the method comprises the steps: obtaining a background magnetic field through a magnetic field collection device; respectively and independently electrifying a Gx coil, a Gy coil and a Gz coil of the gradient coil, and measuring and acquiring a corresponding Gx working magnetic field, a corresponding Gy working magnetic field and a corresponding Gz working magnetic field through a magnetic field acquisition device; according to the Gx working magnetic field, the Gy working magnetic field, the Gz working magnetic field and the background magnetic field, obtaining corresponding Gx center gradient intensity, Gy center gradient intensity and Gz center gradient intensity through spherical harmonic transformation; according to the Gx working magnetic field, the Gx center gradient intensity, the Gy working magnetic field, the Gy center gradient intensity, the Gz wo