Results 41 to 50 of about 1,957,229 (358)
Iterative reconstruction of the transducer surface velocity [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2013 Ultrasound arrays used for medical imaging consist of many elements placed closely together. Ideally, each element vibrates independently. However, because of mechanical coupling, crosstalk between neighboring elements may occur. To quantify the amount of crosstalk, the transducer velocity distribution should be measured.
Alles, EJ, Van Dongen, KWA
openaire +4 more sources
3D reconstruction of magnetization from dichroic soft X-ray transmission tomography [PDF]
, 2018 The development of magnetic nanostructures for applications in spintronics requires methods capable of visualizing their magnetization. Soft X‐ray magnetic imaging combined with circular magnetic dichroism allows nanostructures up to 100–300 nm in ...
Alvarez-Prado, Luis Manuel +10 more
core +1 more source
Approximate Message Passing Algorithm for Nonconvex Regularization
IEEE Access, 2019 In this paper, we study the sparse signal reconstruction with nonconvex regularization, mainly focusing on two popular nonconvex regularization methods, minimax concave penalty (MCP) and smoothly clipped absolute deviation (SCAD).
Hui Zhang +4 more
doaj +1 more source
Multiresolution spatiotemporal mechanical model of the heart as a prior to constrain the solution for 4D models of the heart. [PDF]
, 2019 In several nuclear cardiac imaging applications (SPECT and PET), images are formed by reconstructing tomographic data using an iterative reconstruction algorithm with corrections for physical factors involved in the imaging detection process and with ...
Gullberg, Grant T +6 more
core +2 more sources
Scientific Reports, 2021 Non-contrast cerebral computed tomography (CT) is frequently performed as a first-line diagnostic approach in patients with suspected ischemic stroke.
Karolin J. Paprottka +8 more
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Viscoelastic modulus reconstruction using time harmonic vibrations [PDF]
, 2014 This paper presents a new iterative reconstruction method to provide high-resolution images of shear modulus and viscosity via the internal measurement of displacement fields in tissues.
Ammari, Habib +2 more
core +4 more sources
Iterative CT reconstruction using shearlet-based regularization [PDF]
, 2012 In computerized tomography, it is important to reduce the image noise without increasing the acquisition dose. Extensive research has been done into total variation minimization for image denoising and sparse-view reconstruction. However, TV minimization
Goossens, Bart +6 more
core +1 more source
GENFIRE: A generalized Fourier iterative reconstruction algorithm for high-resolution 3D imaging [PDF]
Scientific Reports, 2017 Tomography has made a radical impact on diverse fields ranging from the study of 3D atomic arrangements in matter to the study of human health in medicine.
A. Pryor +9 more
semanticscholar +1 more source
Data in Brief, 2017 The data presented in this articles are related to the research article entitled “The feasibility of Forward-projected model-based Iterative Reconstruction SoluTion (FIRST) for coronary 320-row computed tomography angiography: a pilot study” (E. Maeda, N.
Eriko Maeda +7 more
doaj +1 more source
Image quality with iterative reconstruction techniques in CT of the lungs—A phantom study
European Journal of Radiology Open, 2018 Background: Iterative reconstruction techniques for reducing radiation dose and improving image quality in CT have proved to work differently for different patient sizes, dose levels, and anatomical areas.
Hilde Kjernlie Andersen +2 more
doaj +1 more source