The X-ray source and radiation detector in a conventional computed tomography (CT) system are rotated on a gantry so that the angle at which the X-ray beams intersect the object constantly changes. In...
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In computed tomography (CT) imaging, divergent beam data acquisition modes have the potential to speed up data acquisition and shorten scan time. However, image reconstruction from divergent-beam proj...
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In clinical computed tomography (CT) practice, image artifacts arise when some data is missing or inconsistent, such as in the case of large patients that extend beyond the imaging field of view or pa...
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In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
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In a computed tomography (CT) system, an X-ray source projects a fan-shaped beam, which passes through the object being imaged and hits an array of radiation detectors. The source and detector array a...
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In imaging technologies, signal-to-noise ratio (SNR) is a quantitative measure of image quality. In medical imaging specifically, as SNR decreases, it becomes increasingly difficult to differentiate b...
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Most commercially available computed tomography (CT) systems employ image reconstruction methods based on the concepts of Radon space and the Radon transform. When a CT X-ray source projects a single ...
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Computed tomography (CT) uses special X-ray equipment to obtain image data from different angles of the body and generate a cross-sectional image of body tissues and organs. Because CT is a non-invasi...
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The Feldkamp (FDK) algorithm is widely used for image reconstruction for cone-beam projections, which are utilized in three-dimensional computed tomography (CT). However, because current FDK-type algo...
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One problem associated with intensity modulated radiation therapy (IMRT) is that the precise position, shape and size of the target often changes between the time the plan was developed and the actual...
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