An imaging system and method for producing an image based on primary radiation. A separate image based solely on scattered radiation may also be obtained and may be of practical interests. The separation of primary and scattered radiation is achieved by utilizing a small beam exposure and a cone beam exposure, then the primary and scatter images are reconstructed based on a pencil beam model or from a Monte Carlo method. Other embodiments disclosed include two-layer detector arrays or volumetric detector arrays that measure the relationship between the dose and the position, from which the primary and scattered radiation can be extracted. In addition, by limiting a readout time of a detector, primary radiation component may be read because of a delay in the scattered radiation.
In one aspect, embodiments disclosed herein relate to reconstructing an image of an internal structure of an object based on a primary radiation component. In another aspect, embodiments disclosed herein relate to reconstructing an image of an internal structure of an object based on a scattered radiation component.
In another aspect, embodiments disclosed herein relate to reconstructing an image of an internal structure of an object based on separate primary and scattered radiation using mathematical means to separate the primary and the scattered radiation components. In another aspect, embodiments disclosed herein relate to modifying the configuration detector arrays to obtain information needed to separate primary and scattered radiation components.
In another aspect, embodiments disclosed herein relate to using two-layer detector arrays or 3-D volumetric detector arrays to detect a relationship between a radiation flux and a distance from a radiation source in order to obtain separate primary and scattered radiation components. In another aspect, embodiments disclosed herein relate to using a timing means to temporally distinguish primary radiation from scattered radiation.
In another aspect, embodiments disclosed herein relate to using pencil or fan beams together with cone beams to separate primary and scatter. In another aspect, embodiments disclosed herein relate to utilizing Monte Carlo simulations iteratively to produce separate images based on primary and scattered radiation, respectively.
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