Results 201 to 210 of about 302,774 (259)

Principles of X-ray Computed Tomography

2017
In this chapter, the physical and mathematical principles of X-ray computed tomography are summarised. First, the fundamentals of X-ray physics are covered, with details on generation, propagation and attenuation of X-rays, including a brief introduction to phase-contrast and dark-field imaging.
Hermanek, Petr   +3 more
openaire   +3 more sources

X‐ray‐transmission computed tomography

Medical Physics, 1977
The immediate goal of clinically based x‐ray‐transmission computed tomography (CT) is to provide a measurement of the x‐ray linear attenuation coefficient in cross section with the ultimate goal of impacting on patient managerment and care. To do this with the accuracy needed for clinical goals requires the careful integration of x‐ray physics ...
E C, McCullough, J T, Payne
openaire   +2 more sources

X-ray computed tomography

Physics in Medicine and Biology, 2006
X-ray computed tomography (CT), introduced into clinical practice in 1972, was the first of the modern slice-imaging modalities. To reconstruct images mathematically from measured data and to display and to archive them in digital form was a novelty then and is commonplace today.
openaire   +2 more sources

Dynamic X-ray computed tomography

Proceedings of the IEEE, 2003
Dynamic computed tomography (CT) imaging aims at reconstructing image sequences where the dynamic nature of the living human body is of primary interest. The main applications concerned are image-guided interventional procedures, functional studies and cardiac imaging.
Stéphane Bonnet   +5 more
openaire   +1 more source

X-ray computed tomography

Electronics and Power, 1978
X-ray computed tomography, derived from the Greek meaning 'to write a slice or section', has been commercially available from 1972, after its invention and development by G.N. Hounsfield at the central research laboratories of EMI in 1967. Since then, its impact on the medical world has been as great as the discovery of X-rays itself, and despite the ...
openaire   +1 more source

Dose in x-ray computed tomography

Physics in Medicine and Biology, 2014
Radiation dose in x-ray computed tomography (CT) has become a topic of high interest due to the increasing numbers of CT examinations performed worldwide. This review aims to present an overview of current concepts for both scanner output metrics and for patient dosimetry and will comment on their strengths and weaknesses.
openaire   +2 more sources

Computed radiography X-ray exposure trends

Academic Radiology, 1995
Computed radiography provides correct optical density on film, independent of the incident radiation exposure, but it can result in under- or overexposure of the imaging plate. In the current study, we evaluated the radiation exposure trends of computed radiography over a 2-year period for portable chest examinations to determine and compare the ...
J A, Seibert, D K, Shelton, E H, Moore
openaire   +2 more sources

X-Ray Testing by Computer Vision

2013 IEEE Conference on Computer Vision and Pattern Recognition Workshops, 2013
X-ray imaging has been developed not only for its use in medical imaging for human beings, but also for materials or objects, where the aim is to analyze (nondestructively) those inner parts that are undetectable to the naked eye. Thus, X-ray testing is used to determine if a test object deviates from a given set of specifications. Typical applications
openaire   +1 more source

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