General Electric Company

Michael Joseph Cook

David Leo McDaniel

Scott David Wollenweber

John Jay Williams

Mark Kenneth Limkeman

Michael George Bonner

Mark P Feilen

Dershan Luo

Edwin L Oswalt

Mark E Wille

Kelly Lynn Piacsek

Steven Gerald Kohlmyer

Patrick Joseph O'Day

Janice Chu

Emission event data of an object of interest is acquired with a detector comprising a plurality of rings defining corresponding slices. Also, an amount of motion for each of a plurality of segments is determined with one or more processing units, wherein each segment corresponds to less than an axial field of view (AFOV) of the detector. Further, motion mitigation is performed for segments for which the amount of motion satisfies a threshold to provide motion mitigated data, and not performed for segments for which the amount of motion does not satisfy the threshold to provide non-mitigated data. An image is reconstructed using the motion mitigated data and the non-mitigated data, and the image is displayed on a display.

Systems and methods for motion mitigation determinations

A method for selecting data to reconstruct a three-dimensional (3D) image of a subject of interest includes acquiring a 3D emission dataset of the subject of interest, acquiring a respiratory signal of the subject of interest, the respiratory signal including a plurality of respiratory cycles, and calculating a respiratory profile using the respiratory signal. The method further includes, for each respiratory cycle, generating a gating window, calculating a minimum total squared difference (TSD) between a plurality of phases in the respiratory profile and the same plurality of phases in the respiratory cycle, and positioning the gating window based on the TSD values calculated, and reconstructing a 3D image using only the emission data within the plurality of gated windows. A system and non-transitory computer readable medium are also described herein.

Method and apparatus for data selection for positron emission tomogrpahy (PET) image reconstruction

Apparatus and methods for detector scatter recovery for positron emission tomography systems are provided. One method includes identifying detected gamma events in different detector units of a nuclear medicine (NM) imaging detector and determining whether the detected gamma events occurred within a predetermined time period and have a summed energy of at least a predetermined level to define gamma events for reconstitution. The method further includes reconstituting the defined gamma events into single valid gamma events.

Apparatus and methods for detector scatter recovery for nuclear medicine imaging systems

A method for compressing imaging data includes acquiring a stream of imaging data, and dividing the stream of imaging data into a plurality of interstices, each interstice including a plurality of detected events. The also includes classifying the detected events within each interstice based on a probability of occurrence of the detected event, and reordering the detected events within each interstice based on the probability of occurrence to compress the image data. The method further includes generating a ring pair identification number for each detected event in the plurality of interstices.

Method and system for compressing data

A method for reducing a need for physical memory includes compressing a sub-region of an intermediate histogram to obtain a compressed result, and storing the compressed result in a physical or virtual file.

Method and apparatus for PET time of flight generation of compression sinogram and image reconstruction

A method of imaging an object using a medical imaging system is provided. The imaging method acquires a stream of sinogram data. Changes in the stream of sinogram data corresponding to movement of the object are detected. The method selects portions of the stream of sinogram data. An image of the object based on the selected portions of the sinogram data is generated.

Device-less gating of physiological movement for improved image detection

A method of calibrating detectors in a detector ring of a PET scanner, each detector including a plurality of crystals, the PET scanner having a field of view, is disclosed. The method comprises collecting timing data indicative of coincidence events occurring between each pair of crystals within the field of view. The method further comprises determining a detector adjustment value for each detector, determining a crystal adjustment value for each crystal in each detector, and discretizing the crystal adjustment value for each crystal to produce a discretized crystal adjustment value for each crystal. Lastly, the method comprises calibrating each detector by applying the discretized crystal adjustment value for each crystal in each detector to the collected timing data indicative of coincidence events.

Crystal-based coincidence timing calibration method

A method and apparatus for compressing an initial imaging data stream, the method dividing the data stream into acquired data nibbles, comparing the acquired nibbles to initial nibble values and where an acquired nibble value and an associated initial nibble value are equal, discarding the acquired nibble and indicating so in a bit map and where the acquired nibble value and the initial value are different, placing the acquired value in an intermediate data stream and indicating retention in the bit map.

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Oconomowoc, WI, United States of America

Michael Joseph Cook