An apparatus for obtaining tomographic, tomosynthesis, and still picture data of an object comprising: - a divergent radiation source provided for emitting radiation centered around an axis of symmetry (x); - a radiation detector comprising a two-dimensional array of line detectors, each having a detection-sensitive area directed towards the divergent radiation source and being provided for one-dimensional imaging of radiation entering said detection-sensitive area; - a region arranged in the radiation path between said divergent radiation source and said radiation detector provided for housing said object; and - a device provided for moving said divergent radiation source and said radiation detector relative said object, while each of said line detectors is adapted to record a plurality of line images of radiation as transmitted through said object, characterized in that: - said divergent radiation source is provided for emitting radiation within a solid angle (α, β) such that radiation is directed towards an extension of at least 30 cm in a first dimension (y), which is perpendicular to said axis of symmetry (x); - the line detectors of said two-dimensional array of line detectors are sited in rows and columns, wherein the line detectors of each row are sited edge-to-edge along a line, and are of a number and have each a length such that they are together capable of detecting said radiation directed towards the extension in said first dimension (y); and - said moving device is provided for - moving said divergent radiation source and said radiation detector relative said object helically around a second axis (z) being essentially perpendicular to said axis of symmetry (x) and the direction of said first dimension (y), to obtain tomographic data of said object; - moving said divergent radiation source and said radiation detector relative said object linearly along said second axis (z) a distance corresponding to the full extension of said object along the second axis (z) to obtain tomosynthesis data of said object; and - moving said divergent radiation source and said radiation detector relative said object linearly along said second axis (z) a distance corresponding to a distance between two adjacent line detectors in a column of said two-dimensional array to obtain still picture data of said object. - a divergent radiation source provided for emitting radiation centered around an axis of symmetry (x); - a radiation detector comprising a two-dimensional array of line detectors, each having a detection-sensitive area directed towards the divergent radiation source and being provided for one-dimensional imaging of radiation entering said detection-sensitive area; - a region arranged in the radiation path between said divergent radiation source and said radiation detector provided for housing said object; and - a device provided for moving said divergent radiation source and said radiation detector relative said object, while each of said line detectors is adapted to record a plurality of line images of radiation as transmitted through said object, - said divergent radiation source is provided for emitting radiation within a solid angle (α, β) such that radiation is directed towards an extension of at least 30 cm in a first dimension (y), which is perpendicular to said axis of symmetry (x); - the line detectors of said two-dimensional array of line detectors are sited in rows and columns, wherein the line detectors of each row are sited edge-to-edge along a line, and are of a number and have each a length such that they are together capable of detecting said radiation directed towards the extension in said first dimension (y); and - said moving device is provided for - moving said divergent radiation source and said radiation detector relative said object helically around a second axis (z) being essentially perpendicular to said axis of symmetry (x) and the direction of said first dimension (y), to obtain tomographic data of said object; - moving said divergent radiation source and said radiation detector relative said object linearly along said second axis (z) a distance corresponding to the full extension of said object along the second axis (z) to obtain tomosynthesis data of said object; and - moving said divergent radiation source and said radiation detector relative said object linearly along said second axis (z) a distance corresponding to a distance between two adjacent line detectors in a column of said two-dimensional array to obtain still picture data of said object. - moving said divergent radiation source and said radiation detector relative said object helically around a second axis (z) being essentially perpendicular to said axis of symmetry (x) and the direction of said first dimension (y), to obtain tomographic data of said object; - moving said divergent radiation source and said radiation detector relative said object linearly along said second axis (z) a distance corresponding to the full extension of said object along the second axis (z) to obtain tomosynthesis data of said object; and - moving said divergent radiation source and said radiation detector relative said object linearly along said second axis (z) a distance corresponding to a distance between two adjacent line detectors in a column of said two-dimensional array to obtain still picture data of said object.