1. A method for determining a projection angle for use in tomographic imaging, the method comprising: obtaining projection data comprising at least one projection view from at least one projection angle, the at least one projection view being generated by scanning of a test object with a tomographic imaging device; providing a plurality of candidate projection angles; for each candidate projection angle, calculating a function value indicative of an amount of information that may be gained by adding to said projection data a further projection view generated by scanning of the test object with the tomographic imaging device from said candidate projection angle, wherein the function value is calculated without specific prior knowledge of the test object, the specific prior knowledge being a blueprint image or model for the test object; selecting a candidate projection angle from the plurality of candidate projection angles taking into account said function values.