A method for generating an x-ray CT reconstruction with an imaging system comprising an x-ray source and a detector mounted to a rotatable rotor, the method comprising: generating an electronic representation of image data received at a plurality of detector elements of the detector while the rotor rotates; sending the electronic representation of the image data to a processor located on the rotor while the rotor is rotating; performing tomographic reconstruction of the image data using the processor located on the rotor; and transmitting the reconstruction from the rotor to an entity off the rotor, characterized in that the detector comprises a plurality of detector modules (107, 1071, 1072, 1073), each detector module including a plurality of detector elements and a processor, and characterised by the generating an electronic representation of image data comprising: receiving a clock signal at a processor of a first detector module comprising a first plurality of detector elements; transmitting an electronic representation of image data received at the first plurality of detector elements to a second detector module comprising a second plurality of detector elements; receiving the electronic representation of image data from the first detector module at a processor of a second detector module comprising a second plurality of detector elements; appending an electronic representation of image data received at the second plurality of detector elements to the electronic representation of image data received from the first detector module to generate a combined image data set; and transmitting the combined image data set from the second detector module. generating an electronic representation of image data received at a plurality of detector elements of the detector while the rotor rotates; sending the electronic representation of the image data to a processor located on the rotor while the rotor is rotating; performing tomographic reconstruction of the image data using the processor located on the rotor; and transmitting the reconstruction from the rotor to an entity off the rotor, characterized in that the detector comprises a plurality of detector modules (107, 1071, 1072, 1073), each detector module including a plurality of detector elements and a processor, and characterised by the generating an electronic representation of image data comprising: receiving a clock signal at a processor of a first detector module comprising a first plurality of detector elements; transmitting an electronic representation of image data received at the first plurality of detector elements to a second detector module comprising a second plurality of detector elements; receiving the electronic representation of image data from the first detector module at a processor of a second detector module comprising a second plurality of detector elements; appending an electronic representation of image data received at the second plurality of detector elements to the electronic representation of image data received from the first detector module to generate a combined image data set; and transmitting the combined image data set from the second detector module. receiving a clock signal at a processor of a first detector module comprising a first plurality of detector elements; transmitting an electronic representation of image data received at the first plurality of detector elements to a second detector module comprising a second plurality of detector elements; receiving the electronic representation of image data from the first detector module at a processor of a second detector module comprising a second plurality of detector elements; appending an electronic representation of image data received at the second plurality of detector elements to the electronic representation of image data received from the first detector module to generate a combined image data set; and transmitting the combined image data set from the second detector module.