FIELD: physics.
SUBSTANCE: invention relates to positron imaging and reconstruction of data collected during positron emission tomography (PET). The device includes: a positron emission scanner (102), an iterative local reconstruction unit (146) which reconstructs spatially truncated projection data collected along operating lines which cross the subregion of the object in order to form image space data which characterise the object and additionally includes a unit (606) for forming front projections; a unit (624) for forming back projections, obtained via back projection, in order to update image evaluation; the device also includes a motion compensating unit (142) for compensating motion of the object; an image merging unit (148) which merges image space data with space data of another image, characterising the object; a machine-readable data medium, having commands for executing the method, identifying the region of interest of the object, spatial truncating of the collected projection data, wherein the spatial truncating step includes identification of projection data collected along operating lines which cross the region of interest, performing iterative local reconstruction of spatially truncated data collected during positron emission analysis of the object.
EFFECT: design of a device and a method for positron emission tomography, which collects projection data along operating lines which cross the identified region of interest which characterises positron annihilation in the analysed object.
14 cl, 7 dwg
