A system for generating a projection image from an examination of an object using radiation, the system comprising: an examination unit for generating volumetric data in projection space yielded from an examination of an object using at least a first view and a second view; and an image generator for generating a projection image responsive to the volumetric data, the image generator configured to: define a surface about which a projection image of the object is focused; map a first portion of the volumetric data, corresponding to the first view, to the surface, wherein the image generator is further configured to map the first portion by: determining a first set of trajectories between a radiation source emitting the radiation during the first view and predefined locations on each of a plurality of detector cells; identifying intersections between each trajectory of the first set of trajectories and the surface; and mapping data, yielded from the each of the plurality of detector cells and corresponding the first view, to the each of the intersections; map a second portion of the volumetric data, corresponding to the second view, to the surface; and generate a projection image responsive to mapping the first portion and mapping the second portion. an examination unit for generating volumetric data in projection space yielded from an examination of an object using at least a first view and a second view; and an image generator for generating a projection image responsive to the volumetric data, the image generator configured to: define a surface about which a projection image of the object is focused; map a first portion of the volumetric data, corresponding to the first view, to the surface, wherein the image generator is further configured to map the first portion by: determining a first set of trajectories between a radiation source emitting the radiation during the first view and predefined locations on each of a plurality of detector cells; identifying intersections between each trajectory of the first set of trajectories and the surface; and mapping data, yielded from the each of the plurality of detector cells and corresponding the first view, to the each of the intersections; map a second portion of the volumetric data, corresponding to the second view, to the surface; and generate a projection image responsive to mapping the first portion and mapping the second portion. define a surface about which a projection image of the object is focused; map a first portion of the volumetric data, corresponding to the first view, to the surface, wherein the image generator is further configured to map the first portion by: determining a first set of trajectories between a radiation source emitting the radiation during the first view and predefined locations on each of a plurality of detector cells; identifying intersections between each trajectory of the first set of trajectories and the surface; and mapping data, yielded from the each of the plurality of detector cells and corresponding the first view, to the each of the intersections; determining a first set of trajectories between a radiation source emitting the radiation during the first view and predefined locations on each of a plurality of detector cells; identifying intersections between each trajectory of the first set of trajectories and the surface; and mapping data, yielded from the each of the plurality of detector cells and corresponding the first view, to the each of the intersections; map a second portion of the volumetric data, corresponding to the second view, to the surface; and generate a projection image responsive to mapping the first portion and mapping the second portion. <EOS>