Systems and methods for image reconstruction using variable-density spiral trajectory

US9989611B2 · kind B2 · utility

Assignee

• University of Virginia Patent Foundation · US

Inventors

• Li Zhao · Charlottesville, US
• Craig H. Meyer · Palo Alto, US

Key dates

• Filing date: Apr 2, 2015
• Grant date: Jun 5, 2018
• Expiry date: Dec 7, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4824
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In image reconstruction using a variable-density spiral trajectory, a method includes acquiring magnetic resonance (MR) data, which includes determining a multi-level undersampling pattern based on sampling distance and probability functions, and determining a desired variable-density spiral trajectory based on the undersampling pattern. Acquiring the MR data also includes generating spiral gradient waveforms based on the desired trajectory, and tracing a variable-density spiral trajectory using the spiral gradient waveforms. After tracing, the MR data can be sub-sampled based on the variable-density spiral trajectory. One or more images can be reconstructed based on the acquired MR data.