Image reconstruction: Part 1 – understanding filtered back projection, noise and image acquisition
نویسندگان
چکیده
منابع مشابه
Nonlinear Back Projection for Tomographic Image Reconstruction
The objective of this paper is to investigate a new non-iterative paradigm for image reconstruction based on the use of nonlinear back projection filters. This method, which we call nonlinear back projection (NBP), attempts to directly model the optimal inverse operator through off-line training. Potential advantages of the NBP method include the ability to better account for effects of limited...
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The software’s that are currently used in 3D image reconstruction are usually presented as a so called “black box”, which contains usually more algorithms. These algorithms are used in mathematics software like MatLab®, Mathematica®, Maple® and other. MatLab®, among others contain a very advanced module for image analysis and in the present work it will be presented a reconstruction of a test i...
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Introduction: Recent studies of Computed Tomography (CT) conducted on patient dose reduction have recommended using an iterative reconstruction algorithm and mA (mili-Ampere) dose modulation. The current study aimed to evaluate Iterative Dose Reduction Algorithm (IDREAM) as an iterative reconstruction algorithm. Material and Methods: Two CT p...
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BACKGROUND In computed tomography (CT), there is increasing concern for potential CT radiation hazards. Several raw-data-based iterative reconstruction techniques attempt to facilitate low-dose imaging without compromising image quality, which raises the question whether these techniques may allow further dose reduction. PURPOSE To compare image quality of iterative reconstruction and filtere...
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BACKGROUND AND PURPOSE IR has recently demonstrated its capacity to reduce noise and permit dose reduction in abdominal and thoracic CT applications. The purpose of our study was to assess the potential benefit of IR in head CT by comparing objective and subjective image quality with standard FBP at various dose levels. MATERIALS AND METHODS Ninety consecutive patients were randomly assigned ...
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ژورنال
عنوان ژورنال: Journal of Cardiovascular Computed Tomography
سال: 2020
ISSN: 1934-5925
DOI: 10.1016/j.jcct.2019.04.008