Abstract: A method includes decomposing, for each of a plurality of orthogonal slices, a set of PRF baseline images for the orthogonal slice into a set of baseline image features for the orthogonal slice; acquiring, using a magnetic imaging resonance (MRI) scanner of a MRI system based on a RF excitation pulse sequence for each of the plurality of orthogonal slices, a combined multi-encoded PRF treatment image; subtracting a weighted sum of the sets of baseline image features from the combined multi-encoded PRF treatment image to obtain a combined treatment-specific temperature information of the imaging region that provides multi-orthogonal slice temperature information associated with or resulting from treatment or thermal ablation of the imaging region of the patient after subtraction or removal of the baseline image features; and processing the combined treatment-specific temperature information to obtain slice-specific treatment-specific temperature information for each of the plurality of orthogonal slices.

Abstract: A method includes determining, during a calibration phase without application of ultrasound waves, a per-pixel magnetic field gradient of a magnetic field that is generated using a calibration drive signal applied to a magnetic coil; generating, during a treatment phase, a magnetic field gradient that is applied to a treatment area by using a treatment drive signal applied to the magnetic coil, wherein treatment drive signal is different from the calibration drive signal; determining, based on the treatment drive signal applied to the magnetic coil, per-pixel phases of a treatment image of the treatment area, wherein the per-pixel phases of the treatment image are based on spin displacement at each pixel resulting from the applied ultrasound waves; and adjusting, for each pixel of the treatment image, the per-pixel phases of the treatment image based on the per-pixel magnetic field gradient for a corresponding pixel, to obtain a gradient-adjusted treatment image.