Patent ID: 9638777
Date: 2017-05-02
CPC Classifications: A61B,G01R

Claim:
1. A magnetic resonance method of electric properties tomography of an object, the method comprising: applying an imaging sequence that includes an excitation RF field to the object via a coil at a first spatial coil position, acquiring resulting magnetic resonance signals via a receiving channel from the object, determining from the acquired magnetic resonance signals a first phase distribution and a first amplitude of a first magnetic field component of the excitation RF field of the coil at the first coil position, applying an excitation RF field to the object via a coil at a second spatial coil position, wherein the second spatial coil position is different from the first spatial coil position, acquiring resulting magnetic resonance signals via the receiving channel from the object, determining from the acquired magnetic resonance signals a second phase distribution and a second amplitude of a second magnetic field component of the excitation RF field of the coil at the second coil position, determining a phase difference distribution between the first and second phase distribution, determining a first and a second expression for the object's complex permittivity, the first expression for the complex permittivity expressed as a function of the first amplitude of the first magnetic field component and the second expression for the complex permittivity expressed as a function of the second amplitude of the second magnetic field component and the phase difference, equating the first complex permittivity and the second complex permittivity for receiving a final equation and determining from the final equation a phase of the given magnetic field component for the first coil position; and performing an electrical properties tomographic reconstruction using at least one of the first amplitude, the second amplitude, and the phase to generate an electrical properties tomographic image.