Siemens Medical Solutions Usa, Inc.

Mark W Lenox

Danny F Newport

Blake Atkins

Stefan B Siegel

Aaron McFarland

Michael E Casey

Vladimir Y Panin

Christian J Michel

Dongming Hu

Mu Chen

Larry Byars

Charles H Hayden, Jr

Timothy G Gremillion

Merence Sibomana

A PET event position calculation method using a combination angular and radial event map wherein identification of the radial distance of the event from the centroid of the scintillation crystal with which the event is associated as well as angular information is performed. The radial distance can be converted to a statistical confidence interval, which information can be used in downstream processing. More sophisticated reconstruction algorithms can use the confidence interval information selectively, to generate higher fidelity images with higher confidence information, and to improve statistics in dynamic imaging with lower confidence information.

Realtime line of response position confidence measurement

A representative positron emission tomography (PET) calibration system includes a PET scanner having a ring detector, a phantom that is placed at approximately the center of the ring detector, and a time alignment calibration manager that is coupled to the PET scanner. The time alignment calibration manager detects coincidence events from the phantom, calculates position of time of flight events from the ring detector based on the detected coincidence events, and calculates time offsets for the ring detector using a mean value calculation based on the calculated position of the time of flight events.

Systems and methods for calibrating time alignment for a positron emission tomography (PET) system

A crystal lookup table used to define a matching relationship between a signal position of a detected event in a PET scanner and a corresponding detector pixel location is generated using a neural network-based algorithm, and is implemented by a FPGA.

Crystal lookup table generation using neural network-based algorithm

Emission contamination data are collected in a shifted mock scan simultaneous with the collection of transmission data during a transmission scan of a patient with a collimated gamma point source, the transmission data are corrected with the emission contamination data, and the corrected transmission data are used for attenuation correction of emission data for reconstruction of an emission image of the patient. In a preferred implementation, when the point source is at a particular axial location and illuminates an axial beamwidth of 'Fz' over the gamma detector, emission contamination data are collected from the gamma detector over an axial separated region 'Fz'' having about the same axial extent but axially displaced by about half of the axial field of view (FOV).

Shifted transmission mock for nuclear medical imaging

Growing community of inventors

Harriman, TN, United States of America

Mark W Lenox