An X-ray imaging system includes an X-ray source operable to generate an X-ray beam, an X-ray receiver receiving the X-ray beam, a power generator generating power to the X-ray source to generate the X-ray beam, a grid disposed between the X-ray source and the X-ray receiver, a first pulse generator generating a first signal comprising first multiple pulses at a first pulse rate, each of the first multiple pulses having a pulse width, and a second pulse generator coupled to the grid and the power generator. The second pulse generator is configured to generate a second signal including second multiple pulses at a second pulse rate during each pulse width of the first multiple pulses, wherein the second signal is communicated to the grid to cause the X-ray beam to pulse on and off in accordance with the second signal during imaging. A method includes generating a first pulsed fluoroscopic signal having a first plurality of pulses at a first pulse rate, based on the first pulsed fluoroscopic signal, generating a second pulsed fluoroscopic signal, wherein for each of the first plurality of pulses, a second plurality of pulses is generated at a second pulse rate, and driving voltage of the gird using the second pulsed fluoroscopic signal.