An imaging system is provided that includes a gantry having a bore extending therethrough a plurality of image detectors attached to the gantry and radially spaced around a circumference of the bore such that gaps exist between image detectors along the circumference of the bore an x-ray source attached to the gantry, wherein the x-ray source transmits x-rays across the bore towards at least two of the image detectors wherein at least two image detectors detect both emission radiation and x-ray radiation.
