State of the Art of CT Detectors and Sources: A Literature Review
Efrat Shefer,Ami Altman,Rolf Karl Otto Behling,Raffy Goshen,Lev Gregorian,Yalon Roterman,Igor Uman,Naor Wainer,Yoad Yagil,Oren Zarchin +9 more
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TLDR
The three CT components with the greatest impact on image quality are the X-ray source, detection system and reconstruction algorithms, and this paper focuses on the first two.Abstract:
The three CT components with the greatest impact on image quality are the X-ray source, detection system and reconstruction algorithms. In this paper, we focus on the first two. We describe the state-of-the-art of CT detection systems, their calibrations, software corrections and common performance metrics. The components of CT detection systems, such as scintillator materials, photodiodes, data acquisition electronics and anti-scatter grids, are discussed. Their impact on CT image quality, their most important characteristics, as well as emerging future technology trends for each, are reviewed. The use of detection for multi-energy CT imaging is described. An overview of current CT X-ray sources, their evolution to support major trends in CT imaging and future trends is provided.read more
Citations
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Journal ArticleDOI
Photon-counting Detector CT: System Design and Clinical Applications of an Emerging Technology
Shuai Leng,Michael R. Bruesewitz,Shengzhen Tao,Kishore Rajendran,Ahmed F. Halaweish,Norbert G. Campeau,Joel G. Fletcher,Cynthia H. McCollough +7 more
TL;DR: PCD technology and its use for in vivo high-spatial-resolution multienergy CT imaging is discussed, and examples with phantom, animal, and patient studies are provided.
Journal ArticleDOI
Performance of today’s dual energy CT and future multi energy CT in virtual non-contrast imaging and in iodine quantification: A simulation study
Sebastian Faby,Stefan Kuchenbecker,Stefan Sawall,David Simons,Heinz Peter Schlemmer,Michael Lell,Marc Kachelrieß +6 more
TL;DR: Comparing DECT with future MECT, the authors found noticeable material image quality improvements for an ideal photon counting detector; however, a realistic detector model with multiple energy bins predicts a performance on the level of dual source DECT at 100 kV/Sn 140 kV.
Journal ArticleDOI
Evolution in Computed Tomography: The Battle for Speed and Dose.
TL;DR: Technical advancements of scanner hardware and image reconstruction techniques are reviewed and discussed in their clinical context and have led to a steady increase of CT examinations in all age groups for a number of reasons.
Journal ArticleDOI
Photon-counting x-ray detectors for CT
TL;DR: An overview of data processing, reconstruction methods and metrics of imaging performance; outline clinical applications; and discuss potential future developments in the field of photon-counting CT are given.
Journal ArticleDOI
Assessment of quantification accuracy and image quality of a full-body dual-layer spectral CT system
Sebastian Ehn,Thorsten Sellerer,Daniela Muenzel,Alexander A. Fingerle,Felix K. Kopp,Manuela Duda,Kai Mei,Bernhard Renger,Julia Herzen,Julia Dangelmaier,Benedikt J. Schwaiger,Andreas Sauter,Isabelle Riederer,Martin Renz,Rickmer Braren,Ernst J. Rummeny,Franz Pfeiffer,Peter B. Noël +17 more
TL;DR: Dual‐layer detector based CT offers high quantitative accuracy of spectral images over the complete field‐of‐view without any compromise in radiation dose or diagnostic image quality.
References
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Journal ArticleDOI
Energy-selective reconstructions in X-ray computerized tomography.
TL;DR: It is shown that for any material, complete energy spectral information may be summarized by a few constants which are independent of energy, and a technique is presented which uses simple, low-resolution, energy spectrum measurements and conventional computerized tomography techniques to calculate these constants.
Book
Computed Tomography: Principles, Design, Artifacts, and Recent Advances
TL;DR: Introduction Preliminaries Image Reconstruction Image Presentation Key Performance Parameters of a CT Scanner Major Components of CT scanner Image Artifacts: Appearances, Causes, and Corrections Computer Simulation and Analysis.
Computed Tomography: Principles, Design, Artifacts, and Recent Advances, Fourth Edition
TL;DR: Introduction Preliminaries Image Reconstruction Image Presentation Key Performance Parameters of a CT Scanner Major Components of CT scanner Image Artifacts: Appearances, Causes, and Corrections Computer Simulation and Analysis.
Journal ArticleDOI
A Quantum Theory of the Scattering of X-rays by Light Elements
TL;DR: In this article, it is suggested that when an X-ray quantum is scattered it spends all of its energy and momentum upon some particular electron, which in turn scatters the ray in some definite direction.
Journal ArticleDOI
Experimental feasibility of multi-energy photon-counting K-edge imaging in pre-clinical computed tomography.
Jens-Peter Schlomka,Ewald Roessl,R Dorscheid,S Dill,Gerhard Martens,Thomas Istel,Christian Bäumer,Christoph Herrmann,Roger Steadman,Günter Zeitler,Amir Livne,Roland Proksa +11 more
TL;DR: A CT system with energy detection capabilities is presented, which was used to demonstrate the feasibility of quantitative K-edge CT imaging experimentally and derive a phenomenological model for the detector response and the energy bin sensitivities.