Results 41 to 50 of about 6,983,337 (380)
Image reconstruction in fluorescence molecular tomography with sparsity-initialized maximum-likelihood expectation maximization [PDF]
, 2018 We present a reconstruction method involving maximum-likelihood expectation maximization (MLEM) to model Poisson noise as applied to fluorescence molecular tomography (FMT). MLEM is initialized with the output from a sparse reconstruction-based approach,
Jha, Abhinav K +3 more
core +3 more sources
Life, 2023 Post-surgical I-123 and I-131 SPECT/CT imaging can provide information on the presence and sizes of thyroid remnants and/or metastasis for an accurate re-staging of disease to apply an individualized radioiodine therapy.
Konstantinos Michael +5 more
doaj +1 more source
Feasibility of Imaging Tissue Electrical Conductivity by Switching Field Gradients with MRI. [PDF]
, 2015 Tissue conductivity is a biophysical marker of tissue structure and physiology. Present methods of measuring tissue conductivity are limited. Electrical impedance tomography, and magnetic resonance electrical impedance tomography rely on passing external
Gibbs, Eric, Liu, Chunlei
core +2 more sources
Classification of phantoms for medical imaging
Procedia CIRP, 2023 Phantoms are physical models that mimic biological tissue and its properties in medical imaging. They play an important role in medical quality assurance, research, education, and training, since they can offer an adequate test environment. As the use of medical imaging modalities is a growing field in medicine phantoms are likewise evolving very ...
Wegner, Marie +2 more
openaire +1 more source
Frontiers in Neuroscience, 2016 Purpose: Diffusion MRI provides a non-invasive way of estimating structural connectivity in the brain. Many studies have used diffusion phantoms as benchmarks to assess the performance of different tractography reconstruction algorithms and assumed that ...
Sarah D. Lichenstein +5 more
doaj +1 more source
Design and performance of a compact and stationary microSPECT system [PDF]
, 2013 Purpose: Over the last ten years, there has been an extensive growth in the development of microSPECT imagers. Most of the systems are based on the combination of conventional, relatively large gamma cameras with poor intrinsic spatial resolution and ...
Accorsi +34 more
core +2 more sources
, 2016 The position of the patient highly influences the functioning of the ATCM in CT imaging. The effect of different mis-centerings on the CTDIvol dose was determined during PMMA and water phantom simulations, which were also used for noise assessment.
L. Sukupova, D. Vedlich, F. Jiru
semanticscholar +1 more source
Robustness of radiomic features in magnetic resonance imaging: review and a phantom study
Visual Computing for Industry, Biomedicine, and Art, 2019 Radiomic analysis has exponentially increased the amount of quantitative data that can be extracted from a single image. These imaging biomarkers can aid in the generation of prediction models aimed to further personalized medicine.
R. Cattell, Shenglan Chen, Chuan Huang
semanticscholar +1 more source
A Rotational Cylindrical fMRI Phantom for Image Quality Control. [PDF]
PLoS ONE, 2015 A novel phantom for image quality testing for functional magnetic resonance imaging (fMRI) scans is described.The cylindrical, rotatable, ~4.5L phantom, with eight wedge-shaped compartments, is used to simulate rest and activated states. The compartments
David A Tovar, Wang Zhan, Sunder S Rajan
doaj +1 more source
Fast Monte Carlo Simulation for Patient-specific CT/CBCT Imaging Dose Calculation
, 2011 Recently, X-ray imaging dose from computed tomography (CT) or cone beam CT (CBCT) scans has become a serious concern. Patient-specific imaging dose calculation has been proposed for the purpose of dose management.
Briesmeister J F +23 more
core +1 more source