Geomathematics
An important research area that utilises inverse methods is seismic tomography, a technique for imaging the subsurface of the ... The goal of inverse theory is to determine the spatial distribution of some variable (for example, density or seismic wave ... Geophysical inverse theory is concerned with analyzing geophysical data to get model parameters. It is concerned with the ... doi:10.1007/978-3-540-69496-0. ISBN 978-3-540-69495-3. Parker, Robert L. (1994). Geophysical Inverse Theory. Princeton ...
Tomosynthesis
Though this idea was displaced by the advent of computed tomography, tomosynthesis later gained interest as a low-dose ... Tomosynthesis reconstruction algorithms are similar to CT reconstructions, in that they are based on performing an inverse ... This incomplete set of projections is digitally processed to yield images similar to conventional tomography with a limited ... Tomosynthesis, also digital tomosynthesis (DTS), is a method for performing high-resolution limited-angle tomography at ...
Computational geophysics
... some problems in remote sensing fall within the scope of computational geophysics such as tomography, inverse problems, and 3D ...
Gunther Uhlmann
"Calderón's problem and electrical impedance tomography", Inverse Problems, 25th Anniversary Volume, 25 (2009), 123011. "The ... Applications of this problem include Electrical resistivity tomography in geophysics and Electrical impedance tomography in ... He and John Sylvester made a major breakthrough in Calderón's inverse problem that has led to many other developments including ... Gunther Alberto Uhlmann Arancibia (9 February 1952, Chile) is a mathematician whose research focuses on inverse problems and ...
Poincaré-Steklov operator
Calderón's inverse boundary problem is the problem of finding the coefficient of a divergence form elliptic partial ... This is the mathematical formulation of electrical impedance tomography. The solution of partial differential equation in an ...
Geophysical Tomography Group
The team tried to make real-life demonstrations that the methods of inverse theory could be applied to the imaging problem ... The Geophysical Tomography Group was part of the Institut de Physique du Globe de Paris (Jussieu Campus). During the years 1985 ...
Electrical resistivity tomography
When adequate computers became widely available, the inverse problem of ERT could be solved numerically. The work of Loke and ... Electrical resistivity tomography (ERT) or electrical resistivity imaging (ERI) is a geophysical technique for imaging sub- ... With the advancement in the field of Electrical Resistivity Tomography (ERT) from 1D to 2D and nowadays 3D, ERT has explored ... It is closely related to the medical imaging technique electrical impedance tomography (EIT), and mathematically is the same ...
Tomographic reconstruction
Inverse problems, Multidimensional signal processing, Signal processing, Tomography). ... Using the inverse Fourier transform, the inverse Radon transform formula can be easily derived. f ( x , y ) = 1 2 π ∫ 0 π g θ ... With a sampled discrete system, the inverse Radon transform is f ( x , y ) = 1 2 π ∑ i = 0 N − 1 Δ θ i g θ i ( x cos θ i + y ... The ASTRA Toolbox is a MATLAB and Python toolbox of high-performance GPU primitives for 2D and 3D tomography, from 2009 to 2014 ...
Diffraction tomography
... is an inverse scattering technique used to find the shape of a scattering object by illuminating it with ... It is closely related to X-ray tomography. v t e (Articles lacking sources from June 2020, All articles lacking sources, ...
Photoemission orbital tomography
Moreover, a reconstruction of molecular orbital densities in real space via an inverse Fourier transform and applying an ... In physics and chemistry, photoemission orbital tomography (POT; sometimes called photoemission tomography) is a combined ... Bradshaw, A M; Woodruff, D P (20 January 2015). "Molecular orbital tomography for adsorbed molecules: is a correct description ... The present understanding is that the information retrieved from photoemission orbital tomography should be interpreted as ...
East African Rift
It is an inverse problem technique that models which are the velocities of the inner Earth that reproduce the seismographic ... The geophysical method of seismic tomography is a suitable tool to investigate Earth's subsurface structures deeper than the ... 2006). "A catalogue of deep mantle plumes: New results from finite‐frequency tomography". Geochem. Geophys. Geosyst. 7 (11): n/ ... seismic tomography and geodynamical modeling. The varying geochemical signatures of a suite of Ethiopian lavas suggest multiple ...
Geophysical survey (archaeology)
Inverse modeling of archaeological features from observed data is becoming increasingly important. Processed data are typically ... see Electrical resistivity tomography). Electromagnetic (EM) conductivity instruments have a response that is comparable to ... that of resistance meters (conductivity is the inverse of resistance). Underground archaeological features are detected by ...
Computed tomography laser mammography
An inverse factor is applied to the image so that the high vasculature areas appear white on the image while the black areas ... Computed tomography laser mammography (CTLM) is the trademark of Imaging Diagnostic Systems, Inc. (IDSI, United States) for its ... The technology uses laser in the same way computed tomography uses X-Rays, these beams travel through tissue and suffer ... CTLM-section on Imaging Diagnostic Systems website CTLM on Google Scholar Grable R.J. et al., Optical computed tomography for ...
Cannabinoid receptor 1
The inverse agonist MK-9470 makes it possible to produce in vivo images of the distribution of CB1 receptors in the human brain ... June 2007). "[18F]MK-9470, a positron emission tomography (PET) tracer for in vivo human PET brain imaging of the cannabinoid-1 ... with positron emission tomography. CB1 receptors are expressed most densely in the central nervous system and are largely ...
Gabor Herman
The second edition of his computerized tomography textbook, now titled Fundamentals of Computerized Tomography, was published ... Superiorization: Theory and Applications, Special Issue of the journal Inverse Problems, Volume 33, Number 4, April 2017 Udupa ... Discrete Tomography: Foundations, Algorithms and Applications (Birkhauser, 1999), Advances in Discrete Tomography and Its ... He is known for his work on computerized tomography. He is a fellow of the Institute of Electrical and Electronics Engineers ( ...
Titanium foam
An inverse relationship between plateau stress and porosity was observed with increased porosity resulting in decreased plateau ... Titanium is well-suited for use in magnetic resonance imaging (MRI) and computed tomography (CT), which further enhances its ... closed pores), porosity (the multiplicative inverse of relative density), pore size and shape, and anisotropy. Microstructures ... beyond those that might exist due to the inverse relationship of porosity and compressive strength alone. The precursor mixture ...
Albert Tarantola
Tarantola, Albert (2005). Inverse Problem Theory and Methods for Model Parameter Estimation. SIAM. ISBN 978-0-89871-572-9. ... Tarantola was the leader of the Geophysical Tomography Group, that during the years 1985-2000 developed methods for the ... Beyond just this field, he is widely credited with popularizing the idea that inverse problems can be interpreted in a ... Mosegaard, Klaus; Tarantola, Albert (1995). "Monte Carlo Sampling of Solutions to Inverse Problems" (PDF). Journal of ...
Synthetic-aperture radar
SAR Tomography is a subfield of a concept named as multi-baseline interferometry. It has been developed to give a 3D exposure ... SAR can be implemented as inverse SAR by observing a moving target over a substantial time with a stationary antenna. A ... On using Tomo-SAR with differential interferometry, a new combination named "differential tomography" (Diff-Tomo) is developed ... R. Bamler; P. Hartl (August 1998). "Synthetic aperture radar interferometry". Inverse Problems. 14 (4): R1-R54. Bibcode: ...
Jennifer Mueller
Her dissertation, Inverse Problems in Singular Differential Equations, was supervised by Thomas S. Shores. After postdoctoral ... particularly to problems in medical imaging related to electrical impedance tomography. She is a professor of mathematics at ... With Samuli Siltanen, Mueller is the author of the book Linear and Nonlinear Inverse Problems with Practical Applications (SIAM ... Jennifer L. Mueller is an applied mathematician and biomedical engineer whose research concerns inverse problems and their ...
Quark
... and the inverse process of inverse beta decay are routinely used in medical applications such as positron emission tomography ( ...
Alexander Ramm
of Inverse and Ill-Posed Probl., 9, N1, (2001), 95-102. A. G. Ramm, A non-overdetermined inverse problem of finding the ... A. G. Ramm, A. I. Katsevich, The Radon Transform and Local Tomography, CRC Press, Boca Raton 1996, pp.1-503. A. G. Ramm, Theory ... of Inverse and Ill-Posed Problems, 7, N6, (1999), 561-571. A. G. Ramm, Krein's method in inverse scattering, in the book " ... A. G. Ramm, Completeness of the products of solutions of PDE and inverse problems, Inverse Probl. 6, (1990), 643-664. A. G. ...
Quantum tomography
Using an inverse Radon transformation (the filtered back projection) on w ( q , θ ) {\displaystyle w(q,\theta )} leads to the ... Quantum tomography or quantum state tomography is the process by which a quantum state is reconstructed using measurements on ... "Quantum State Tomography - Qiskit Experiments 0.2.0 documentation". qiskit.org. Retrieved 2022-04-11. "Quantum Tomography - ... One notable example is in the tomography of light, known as optical homodyne tomography. Using balanced homodyne measurements, ...
Live-cell imaging
The principle of HT is very similar to X-ray computed tomography (CT), or CT scan. CT scan measures multiple 2D X-ray images of ... In order to measure 3D RI tomogram of samples, HT employs the principle of holographic imaging and inverse scattering. ... HT is also known as optical diffraction tomography. The combination of holography and rotational scanning allows long-term, ... This gives rise to realistic inverse filtering and guarantees true complex field reconstruction. In conclusion, the 2 ...
Optical tomography
... operator to estimate a volume without the effects of diffusive scattering and subsequent application of a confocal inverse ... Optical coherence tomography Diffuse optical imaging Computed tomography laser mammography Optical+Tomography at the U.S. ... Optical tomography is used mostly in medical imaging research. Optical tomography in industry is used as a sensor of thickness ... Optical tomography is a form of computed tomography that creates a digital volumetric model of an object by reconstructing ...
Hydraulic tomography
These pairs of pumping and drawdown data sets at different locations make an inverse problem better posed, because each pair ... Hydraulic tomography (HT) is a sequential cross-hole hydraulic test followed by inversion of all the data to map the spatial ...
Alberto Calderón
In 2007, the Inverse Problems International Association (IPIA) instituted the Calderón Prize, named in honor of Alberto P. ... and tomography. Alberto Pedro Calderón was born on September 14, 1920, in Mendoza, Argentina, to Don Pedro Calderón, a ... It pioneered a new area of mathematical research in inverse problems. Calderón then took up a post at the University of Buenos ... Calderón, A. P. (1980). "On an inverse boundary value problem" (PDF). Seminar on Numerical Analysis and Its Applications to ...
Holotomography
Lauer, V (2002). "New approach to optical diffraction tomography yielding a vector equation of diffraction tomography and a ... In order to measure 3-D RI tomogram of samples, HT employs the principle of holographic imaging and inverse scattering. ... The principle of HT is very similar to X-ray computed tomography (CT) or CT scan. CT scan measures multiple 2-D X-ray images of ... However, 3D RI tomography does not provide molecular specificity. Generally, the measured RI information cannot be directly ...
Liliana Borcea
... and inverse problems in high-contrast electrical impedance tomography, as well as model reduction techniques for parabolic and ...
List of women in mathematics
... expert in inverse problems and electrical impedance tomography Edith Alice Müller (1918-1995), Swiss mathematician and ... Albanian expert on inverse scattering theory Maria-Carme Calderer, Spanish-American researcher in applied mathematics Nora ... inverse problems, and compressed sensing Kumiko Nishioka (born 1954), Japanese specialist on transcendental numbers and Mahler ... American expert on inverse problems Leslie Cheng, American harmonic analyst Maggie Cheng, Chinese-American applied ...
Vertical electrical sounding
Solution of inverse problem Solution of forward problem Electrical resistivity tomography (ERT) Magnetotellurics Seismo- ... see Electrical resistivity tomography). However, the interpretation of such measurement is rather difficult. In this case, ... Inverse problems, All stub articles, Geophysics stubs). ...
Gabriel Paternain
His recent research focuses on geometric inverse problems and his collaboration with Mikko Salo and Gunther Uhlmann yielded ... solutions to several inverse problems in two dimensions, including the tensor tomography problem and the proof of spectral ... Teaching excellence rewarded Tensor tomography on surfaces, Invent. Math. 193 (2013) 229--247 http://www.dpmms.cam.ac.uk/~gpp24 ...
Fourier domain mode locking
For FDML operation, the filter tuning frequency f {\displaystyle f} needs to match the inverse cavity roundtrip time 1 / τ = c ... A main application for FDML lasers is optical coherence tomography. Essentially, the swept light of an FDML lasers can be ... to meet the requirement that the roundtrip time is a multiple of the inverse filter tuning frequency fiber coupler (FC) to ... A new laser operating regime and applications for optical coherence tomography," Opt. Express 14, 3225-3237 (2006) Christoph M ...