System for optimized low power MR imaging

US10012709B2 · kind B2 · utility

Assignees

• The General Hospital Corporation · US
• Siemens Healthcare Limited · DE

Inventors

• Ovidiu Andronesi · Melrose, US
• Bruce R. Rosen · Lexington, US
• Peter Caravan · Cambridge, US
• Himanshu Bhat · Newton, US

Key dates

• Filing date: Aug 5, 2013
• Grant date: Jul 3, 2018
• Expiry date: Oct 20, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5617
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system acquires MR imaging data of a portion of patient anatomy associated with proton spin lattice relaxation time in a rotating frame using an RF (Radio Frequency) signal generator configured to generate RF excitation pulses and a magnetic field gradient generator configured to generate anatomical volume select magnetic field gradients for phase encoding and readout RF data acquisition. The RF signal generator and the gradient generator are configured to provide a rotating frame preparation pulse sequence comprising at least one of, (a) a T1 spin lattice relaxation in a rotating frame (T1ρ) preparation pulse sequence of adiabatic pulses comprising modulated RF pulses and modulated magnetic field gradients for slice selection and (b) a T2 spin-spin relaxation in a rotating frame (T2ρ) preparation pulse sequence of adiabatic pulses comprising modulated RF pulses and modulated magnetic field gradients for slice selection.