Results 211 to 220 of about 313,016 (258)

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.
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X-Ray and Computed Tomography

2017
This chapter provides an overview of the use of x-ray and computed tomography (CT)-based imaging for brachytherapy. Treatment planning in brachytherapy requires accurate imaging of both the implanted materials and the surrounding anatomy. Ultrasound (US) and magnetic resonance imaging (MRI), which can provide excellent soft-tissue contrast for ...
Martin T. King, Michael J. Zelefsky
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[Computed X-ray densitometry].

Nihon rinsho. Japanese journal of clinical medicine, 1994
Computed X-ray Densitometry (CXD) is a semi-automated method of radiographic densitometry. X-ray photographs of 2nd metacarpal bone, taken with a reference Aluminum phantom, are analyzed by a computed-densitometric machine (Bonalyzer). X-ray films are imaged by a CCD camera and displayed in a screen automatically.
I, Yamamoto, I, Yuu, R, Morita
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Computing Problems and Methods in X-Ray Crystallography

1964
Publisher Summary This chapter presents computing problems and general computational methods in X-ray crystallography, including structure factor calculation, Fourier series calculation, differential synthesis refinement, least-squares, Patterson methods, and phase problem X-ray crystallography.
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Computations in X-Ray Crystallography

1990
In normalized coordinates, the electron density F of a crystal is a function of r ∈ R 3, the Euclidean 3-space, that satisfies the periodicity condition, $$F\left( {r + n} \right) = F\left( x \right),r \in {R^3},n \in {Z^3}.$$ (1) We can write F(r) as a Fourier series $$F\left( r \right) = \sum\limits_{n \in {Z^3}} {\rho \left( n \right ...
Richard Tolimieri, Myoung An
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X-Ray Computed Tomography

1980
Matter is made of elementary particles consisting of a nucleus composed of protons and neutrons surrounded by electrons. The protons are hydrogen nuclei with a positive charge and their number determines the atomic number. The neutrons, which have no electric charge, form with the protons the nucleons which determine the atomic mass.
G. Salamon, J. Saudinos
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X-ray Computed Tomography

1987
X-ray computed tomography (CT) is remarkably helpful in the diagnosis of diseases of the upper abdominal organs, particularly the liver, biliary tract, and pancreas. However, CT examination has not been established as reliable pathognomonic method due to the rapid development of technique and equipment.
Sadayuki Sakuma, Toshihiko Takeuchi, Takeo Ishigaki   +2 more
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Computational X-ray Spectroscopy

2011
This is a short review on computational X-ray ...
V Carravetta, H Agren
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A High-Performance Ytterbium-Based Nanoparticulate Contrast Agent for In Vivo X-Ray Computed Tomography Imaging†

Angewandte Chemie - International Edition, 2012
Yanlan Liu, Jianhua Liu, Qinghai Yuan
exaly  

X-ray micro-computed tomography (μCT) for non-destructive characterisation of food microstructure

Trends in Food Science and Technology, 2016
Marena Manley, Anton du Plessis
exaly