Dynamic pulse control for fluoroscopy

Details Dynamic pulse control for fluoroscopy Dynamic pulse control for fluoroscopy

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H05G 1/22 (2006.01) H05G 1/26 (2006.01) H05G 1/36 (2006.01) H05G 1/46 (2006.01) H05G 1/60 (2006.01)

Patent

CA 2099369

2099369 9212613 PCTABS00014 An apparatus and method for dynamically controlling the generation of radiation pulses during pulse-type fluoroscopic imaging. Brightness of an image produced by a pulse (200) is detected (202), converted to a digital value (204) and compared to an acceptable predetermined value range (206, 208). If the brightness is not acceptable, the pulse rate is reset (212) to a predetermined, relatively fast rate and the energy level for the next pulse adjusted up or down (210) to increase or decrease the brightness as necessary. Once the brightness is found to be acceptable, the pulse rate is returned to the original pulse rate (218). If it is determined that motion is occurring (214, 216), the pulse rate will increase (212) to the relatively fast predetermined pulse rate to provide substantially real-time imaging. If the brightness becomes unacceptable (208) for a pulse during the period of motion, the energy level for the subsequent pulse will be adjusted (210). This technique of pulse control effectively reduces patient dosage and operator exposure to radiation, provides substantially real-time imaging during periods of relative motion and provides rapid image stabilization times.

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