Abstract:
Methods and systems for processing a set of images are described. In accordance with this disclosure, images are registered and an analysis is performed in view of one or more constraints (such as constraints based upon anatomical or physiological considerations). Weighting factors are determined based on the analysis. The weighting factors are used in subsequent processing of the registered (and/or unregistered) images and/or to formulate a visualization that conveys the degree of confidence in the motion estimation used in the registration process.
Abstract:
A method implemented using at least one processor includes receiving time-varying image dataset generated by a medical imaging modality. The image dataset corresponds to a bed position and is affected by quasi-periodic motion data. The method also includes applying a signal decomposition technique to the time-varying image dataset to generate a plurality of dataset components and a plurality of motion signals. The method also includes determining reference data based on the time-varying image dataset, wherein the reference data is representative of a direction of the quasi-periodic motion. The method further includes deriving polarity of each of the plurality of motion signals based on the reference data to generate a plurality of sign corrected motion signals. The method also includes determining a gating signal corresponding to the bed position based on at least one of the plurality of sign corrected motion signals.
Abstract:
A method implemented using at least one processor includes receiving time-varying image dataset generated by a medical imaging modality. The image dataset corresponds to a bed position and is affected by quasi-periodic motion data. The method also includes applying a signal decomposition technique to the time-varying image dataset to generate a plurality of dataset components and a plurality of motion signals. The method also includes determining reference data based on the time-varying image dataset, wherein the reference data is representative of a direction of the quasi-periodic motion. The method further includes deriving polarity of each of the plurality of motion signals based on the reference data to generate a plurality of sign corrected motion signals. The method also includes determining a gating signal corresponding to the bed position based on at least one of the plurality of sign corrected motion signals.
Abstract:
Methods and systems for processing a set of images are described. In accordance with this disclosure, images are registered and an analysis is performed in view of one or more constraints (such as constraints based upon anatomical or physiological considerations). Weighting factors are determined based on the analysis. The weighting factors are used in subsequent processing of the registered (and/or unregistered) images and/or to formulate a visualization that conveys the degree of confidence in the motion estimation used in the registration process.
Abstract:
A method includes receiving Emission Tomography (ET) data of a subject from an ET/Computed Tomography (CT) scanner. The method further includes generating a first motion signal corresponding to a first bed position of the ET/CT scanner from the received ET data and determining whether the first motion signal indicates a periodic motion. The method also includes calculating a first time period from the first motion signal in response to determining that the first motion signal indicates the periodic motion and sending a first acquire notification to the ET/CT scanner to acquire Cinematographic (CINE) Computed Tomography (CT) data from the first bed position based on the first time period.
Abstract:
A method includes receiving Emission Tomography (ET) data of a subject from an ET/Computed Tomography (CT) scanner. The method further includes generating a first motion signal corresponding to a first bed position of the ET/CT scanner from the received ET data and determining whether the first motion signal indicates a periodic motion. The method also includes calculating a first time period from the first motion signal in response to determining that the first motion signal indicates the periodic motion and sending a first acquire notification to the ET/CT scanner to acquire Cinematographic (CINE) Computed Tomography (CT) data from the first bed position based on the first time period.