Abstract: Systems and methods for optical pulse stretching or compression in time are provided. An apparatus of the subject invention can operate as an optical dispersive element for optical pulse stretching or compression in time, as well as laser scanning in space. An apparatus can include a spatial disperser arranged to divide a collimated optical pulsed beam into an array of collimated beams with equally spaced angles, a beam shaper configured to control the spreading angle of the beam array, and a cavity to sequentially reflect the individual beams within the beam array. The cavity can include two non-parallel surfaces, such as two non-parallel mirrors.

Abstract: A method and system for compensating truncated transmission projection data used for attenuation correction in a SPECT apparatus. The method and system include generating an initial estimate of a transmission reconstruction without modeling source geometry or detector collimator response and refining the transmission reconstruction by using the initial estimate with a modified model of the source geometry and the collimation geometry.

Abstract: A reference height calibration procedure obtains a reference error value, which can be used to adjust a height calibration parameter for registering the fields of view (FOVs) of the modules of a multi-modality medical imaging system such as a SPECT-CT imaging system.

Abstract: A method and system for compensating truncated transmission projection data used for attenuation correction in a SPECT apparatus. The method and system include generating an initial estimate of a transmission reconstruction without modeling source geometry or detector collimator response and refining the transmission reconstruction by using the initial estimate with a modified model of the source geometry and the collimation geometry.