Results 71 to 80 of about 8,952 (260)

A comparison of cone-beam computed tomography image quality obtained in phantoms with different fields of view, voxel size, and angular rotation for iCAT NG

Journal of Oral and Maxillofacial Radiology, 2016
Objectives: To characterize cone-beam computed tomography (CBCT) image quality (IQ) and dose for different fields of view (FOVs), voxel size, and angular rotation. Materials and Methods: IQ parameters, including image noise, homogeneity, geometric distortion, artifacts, contrast resolution and spatial resolution, and radiation dose, were measured for ...
Dorothy A Sonya, Jonathan Davies, Nancy Lee Ford   +2 more
openaire   +2 more sources

A Parametric Study of Radiative Dipole Body Array Coil for 7 Tesla MRI

, 2020
In this contribution we present numerical and experimental results of a parametric quantitative study of radiative dipole antennas in a phased array configuration for efficient body magnetic resonance imaging at 7T via parallel transmission. For magnetic
Belov, Pavel A., Berg, Cornelis A. T. van den, Glybovski, Stanislav B., Hurshkainen, Anna A., Melchakova, Irina V., Raaijmakers, Alexander J. E., Steensma, Bart, Voogt, Ingmar J.   +7 more
core  

Four-dimensional Cone Beam CT Reconstruction and Enhancement using a Temporal Non-Local Means Method

, 2012
Four-dimensional Cone Beam Computed Tomography (4D-CBCT) has been developed to provide respiratory phase resolved volumetric imaging in image guided radiation therapy (IGRT).
Ahmad, Bergner, Buades, Combettes, Coupe, Dietrich, Feldkamp, Gilboa, Golub, Gu, Gu, Gu, Gu, Hale, Herk, Hestenes, Hissoiny, Jan-Jakob Sonke, Jia, Jia, Jia, Jia, Jia, Kriminski, Leng, Leng, Li, Li, Li, Lou, Lu, Lu, Men, Men, Samant, Segars, Sharp, Siddon, Sonke, Steve B. Jiang, Tian, Xu, Xun Jia, Yifei Lou, Zhang, Zhen Tian, Zijp   +46 more
core   +1 more source

Neural Fields for Highly Accelerated 2D Cine Phase Contrast MRI

Advanced Science, EarlyView.
ABSTRACT 2D cine phase contrast (CPC) MRI provides quantitative information on blood velocity and flow within the human vasculature. However, data acquisition is time‐consuming, motivating the reconstruction of the velocity field from undersampled measurements to reduce scan times. In this work, neural fields are proposed as a continuous spatiotemporal
Pablo Arratia, Martin J. Graves, Mary McLean, Carolin Pirkl, Carola‐Bibiane Schönlieb, Timo Schirmer, Florian Wiesinger, Matthias J. Ehrhardt   +7 more
wiley   +1 more source

Investigating the Impact of Voxel Size and Postfiltering on Quantitative Analysis of Positron Emission Tomography/Computed Tomography: A Phantom Study

Journal of Medical Physics
Aim: This study aims to investigate the influence of voxel size and postfiltering on the quantification of standardized uptake value (SUV) in positron emission tomography/computed tomography (PET/CT) images. Materials and Methods: National Electrical Manufacturers Association ...
Ahmed Abdel Mohymen, Hamed Ibrahim Farag, Sameh M. Reda, Ahmed Soltan Monem, Said A. Ali   +4 more
openaire   +3 more sources

Variability of radioiodine measurements in the thyroid [PDF]

, 2017
Monte Carlo simulations were carried out to study the response of a thyroid monitor for measuring intake activities of 125I and 131I. The aim of the study was 3-fold: to cross-validate the Monte Carlo simulation programs, to study the response of the ...
Baechler, S., Bailat, C., Bochud, F. O., Damet, J., Laedermann, J. P.   +4 more
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3D Large‐Scale Subwavelength‐Resolution Sound Sheet Tomography Based on an Active and Programmable Circular Meta‐Array

Advanced Science, EarlyView.
A programmable 2048‐element circular ultrasound array combined with a compact acoustic lens produces a thin “sound sheet” over a large field of view, and records echoes with wide angular diversity across the ring aperture. Coherence‐enhanced beamforming converts full‐matrix data into high‐contrast tomographic slices, delivering near‐diffraction‐limited
Qiu‐De Zhang, Zi‐Bin Lin, Zhuo Chen, Zhao‐Hui Liu, Jin‐Lian He, Jun‐Jie Song, Long‐Sheng Zeng, Liang Zhou, Ming‐Yue Ding, Yu‐Gui Peng, Ming Yuchi, Xue‐Feng Zhu   +11 more
wiley   +1 more source

Computational Organ Dosimetry of 89Zr-Labeled hNd2 for Diagnostic PET Using ICRP Reference Phantoms

Science and Technology of Nuclear Installations
This computational study quantifies organ-specific absorbed doses for diagnostic PET with 89Zr-labeled hNd2 using ICRP adult male/female reference voxel phantoms and the MIRD/ICRP framework implemented in IDAC-Dose 2.1, cross-validated in WinAct 1.0 ...
Muneerah Almutairi, Shams A. M. Issa, Hesham M. H. Zakaly   +2 more
doaj   +1 more source

Integrating Spatial Proteogenomics in Cancer Research

Advanced Science, EarlyView.
Xx xx. ABSTRACT Background: Spatial proteogenomics marks a paradigm shift in oncology by integrating molecular analysis with spatial information from both spatial proteomics and other data modalities (e.g., spatial transcriptomics), thereby unveiling tumor heterogeneity and dynamic changes in the microenvironment.
Yida Wang, Yang Wu, Feng Zhang, Parthiban Periasamy, Haiyue You, Denise Goh, Rachel Elizabeth Ann Fincham, Xin Ning, Danping Wu, Lu Liu, Ying Jiang, Zhiwen Qian, Joe Yeong, Yan Zhang   +13 more
wiley   +1 more source

Current status and new horizons in Monte Carlo simulation of X-ray CT scanners [PDF]

, 2018
With the advent of powerful computers and parallel processing including Grid technology, the use of Monte Carlo (MC) techniques for radiation transport simulation has become the most popular method for modeling radiological imaging systems and ...
Ay, Mohammad, Zaidi, Habib
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