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Method of achieving reduced dose X-ray fluoroscopy by employing transform- based estimation of Poisson noise
Method of achieving reduced dose X-ray fluoroscopy by employing transform- based estimation of Poisson noise
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机译:通过基于变换的泊松噪声估计实现减少剂量的X射线透视的方法
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摘要
An interactive system for producing X-ray fluoroscopic images determines X-ray tube photon count and voltage for producing acceptable quality images while minimizing X-ray radiation dosage to a subject. An image is created and a signal to noise (S/N) ratio is estimated from the image by a unitary transform method. The S/N ratio is determined by solving several simultaneous equations and the photon count is estimated to produce an image with a desired S/N ratio. Subsequent X-ray fluoroscopy images are produced with the optimum photon count Q, thereby reducing X-ray dosage. The optimization is repeated periodically to readjust the system.
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