نتایج جستجو برای: filtered back projection

تعداد نتایج: 234805  

Journal: :International Review of Applied Sciences and Engineering 2021

Abstract Mathematical methods take an important part in reconstruction technologies of radiographic image. Back projection, iterative, and analytical (Two-dimensional Fourier, Filtered Projection) are the most procedures for image reconstruction. Whenever there exists numerous projections, have a great performance speed accuracy due to these advantages they comprehensively used X-ray imaging. O...

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...

Journal: :ELCVIA Electronic Letters on Computer Vision and Image Analysis 2013

Journal: :Physics in medicine and biology 2017
Anna K Trull Jelle van der Horst Willem Jan Palenstijn Lucas J van Vliet Tristan van Leeuwen Jeroen Kalkman

As a result of the shallow depth of focus of the optical imaging system, the use of standard filtered back projection in optical projection tomography causes space-variant tangential blurring that increases with the distance to the rotation axis. We present a novel optical tomographic image reconstruction technique that incorporates the point spread function of the imaging lens in an iterative ...

2016
Tobias Würfl Florin C. Ghesu Vincent Christlein Andreas K. Maier

In this paper, we demonstrate that image reconstruction can be expressed in terms of neural networks. We show that filtered backprojection can be mapped identically onto a deep neural network architecture. As for the case of iterative reconstruction, the straight forward realization as matrix multiplication is not feasible. Thus, we propose to compute the back-projection layer efficiently as fi...

Journal: :AJNR. American journal of neuroradiology 2015
A L Kotsenas G J Michalak D R DeLone F E Diehn K Grant A F Halaweish A Krauss R Raupach B Schmidt C H McCollough J G Fletcher

BACKGROUND AND PURPOSE Metal-related artifacts from spine instrumentation can obscure relevant anatomy and pathology. We evaluated the ability of CT images reconstructed with and without iterative metal artifact reduction to visualize critical anatomic structures in postoperative spines and assessed the potential for implementation into clinical practice. MATERIALS AND METHODS We archived CT ...

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