Noise variance analysis using a flat panel x-ray detector: A method for additive noise assessment with application to breast CT applications
نویسندگان
چکیده
منابع مشابه
Assessment of X-Ray Crosstalk in a Computed Tomography Scanner with Small Detector Elements Using Monte Carlo Method
Introduction: Crosstalk is a leakage of X-ray or light produced in a matrix of X-ray detectors or array of photodiodes in one element to other elements affecting on image contrast and spatial resolution. In this study, we assessed X-ray crosstalk in a computed tomography (CT) scanner with small detector elements to estimate the effect of various parameters such as X-ray tube voltage, detector e...
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Application of flat-panel imagers (FPIs) in cone-beam computed tomography (CBCT) offers a promising new modality for fully three-dimensional (3-D) x-ray imaging. Understanding the potential performance and fundamental limitations of such technology, however, requires knowledge of the noise characteristics of the 3-D imaging system. The noise performance of a prototype flat-panel cone-beam CT (F...
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We present a novel generalized model for the analysis of noise with a known spectral density. This model is particularly appropriate for the analysis of noise with a 1/f(a) distribution in a homodyne interferometer. The noise model reveals that, for alpha>1, 1/f(a) noise significantly impacts the homodyne signal-to-noise ratio (SNR) for integration times that near a characteristic time, beyond ...
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ژورنال
عنوان ژورنال: Medical Physics
سال: 2010
ISSN: 0094-2405
DOI: 10.1118/1.3447720