Optimal pulse power measurement method and system for multinuclear simultaneous integrated magnetic resonance imaging

US12326490B1 · kind B1 · utility

Assignee

• HARBIN MEDICAL UNIVERSITY · CN

Inventors

• Xilin Sun · Jingwei, CN
• Chunsheng Yang · Lo Wu, CN
• Kai Wang · Taipei, TW
• Yongyi Wu · Jingwei, CN
• Lijiao Wang · Jingwei, CN
• Lili Yang · Pasadena, US
• Lina Wu · Jingwei, CN
• Zhaoguo Han · Jingwei, CN
• Limin Zheng · Jingwei, CN

Key dates

• Filing date: Dec 31, 2024
• Grant date: Jun 10, 2025
• Expiry date: Dec 31, 2044

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4833
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optimal pulse power measurement method for multinuclear simultaneous integrated magnetic resonance imaging includes the following steps: successively or simultaneously exciting multiple nuclides within a slice in a same repetition time (TR) of magnetic resonance imaging (MRI); applying, in a slice encoding gradient channel, a frequency encoding gradient in a direction opposite to a slice selection gradient, and acquiring free induction decay (FID) signals of all the nuclides; simultaneously changing shaped radiofrequency (RF) pulse power values of all the nuclides for multiple times, and acquiring multiple corresponding FID signals for each nuclide; and performing Fourier transform on the FID signals of each nuclide, selecting a spectral peak in an absolute spectrum, integrating the spectral peak for comparison, and taking a shaped RF pulse power value corresponding to a maximum signal intensity of each nuclide as an optimal shaped RF pulse power corresponding to a current TR.