An x-ray imaging system for imaging a subject includes an x-ray source configured to project an x-ray radiation toward a portion of the subject and a panel detector positioned opposite the x-ray source relative to the subject and configured to receive x-ray radiation passing through the subject. The panel detector includes a scintillation layer converting x-ray radiation to light rays of a selected spectrum and a plurality of microelectromechanical scanners. Each microelectromechanical scanner includes a photodetector mounted on a corresponding movable platform and configured to detect light in the selected light spectrum. The panel detector includes a scanning control module configured to move each platform in a selected scan pattern.