Apparatus and method for multi-band MR imaging

US10061005B2 · kind B2 · utility

Assignees

• Siemens Healthcare Limited · DE
• Regents of the University of Minnesota · US

Inventors

• Xiufeng Li · Beijing, CN
• Steen Moeller · Golden Valley, US
• Gregory J. Metzger · Lake Elmo, US
• Kamil Ugurbil · Minneapolis, US
• Dingxin Wang · Apple Valley, US
• Vibhas S. Deshpande · Austin, US

Key dates

• Filing date: Apr 27, 2015
• Grant date: Aug 28, 2018
• Expiry date: Jan 19, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56366
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A magnetic resonance method and system are provided for providing improved multi-band (MB) magnetic resonance imaging. The adaptive MB imaging can be achieved by providing one or more modified multi-band excitation pulse sequences that include at least either one nullified “dummy” slice within a slab that is not excited simultaneously with the other slices during a single multislice acquisition sequence, or one excitation slice group that utilizes a non-uniform slice spacing between simultaneously excited slices. Adaptive GRAPPA or slice-GRAPPA kernel sizes can also be used during image reconstruction to improve speed without excessive point spread blurring or MB reconstruction failure. A total leakage factor (TLF) can also be determined based on test images using modified MB excitation sequences, and used to improve the adaptive MB procedure.