2 March 2006 Regional exposure management with spatial x-ray gating
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Abstract
Regional x-ray exposure management is a class of techniques for x-ray dose reduction and image quality improvement in radiography and fluoroscopy. X-ray intensity is modulated spatially prior to the beam's interaction with the imaged objects for optimal dose efficiency. The optimal intensity field may be determined from the imaged objects' morphology, local dose sensitivities, regions of clinical interest, and expected information. We present the derivation and simulation results for a method for automated feedback-controlled real-time spatial modulation of the x-ray intensity field. The method employs spatial x-ray gating, a technique in which various beam regions are blocked for controlled portions of the frame integration period while the beam intensity is modulated in time. The method promises to provide controllable smooth x-ray intensity fields with precise and sensitive controls operating, if desired, automatically in a feedback loop.
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Dimitri V. Yatsenko, R. Larry Anderton, Kris Sikorski, Robert M. Kirby, "Regional exposure management with spatial x-ray gating", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 614218 (2 March 2006); doi: 10.1117/12.654066; https://doi.org/10.1117/12.654066
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