An imaging system (100) includes a detector array (110) that detects radiation traversing an examination region. The detector array includes at least a set of non-spectral detectors (112) that detects a first sub-portion of the radiation traversing the examination region and generates first signals indicative thereof. The detector array further includes at least a set of spectral detectors (114) that detects a second sub-portion of the radiation traversing the examination region and generates second signals indicative thereof. The imaging system further includes a reconstructor (120) that processes the first and second signals, generating volumetric image data.