Limited-angle acousto-electrical tomography

Acousto-electrical speckle pattern in Lorentz force electrical impedance tomography.

Ultrasound speckle is a granular texture pattern appearing in ultrasound imaging. It can be used to distinguish tissues and identify pathologies. Lorentz force electrical impedance tomography is an ultrasound-based medical imaging technique of the tissue electrical conductivity. It is based on the application of an ultrasound wave in a medium placed in a magnetic field and on the measurement of...

Limited Angle Tomography Using Volumetric Constraints

Earth with 4 station receiver chain The ionosphere lies approximately in the 80 — 500 km altitude range. As the satellite passes over head it sends dual frequency radio signals at 150 and 400 MHz respectively which undergo different amounts of Doppler phase shift along each ray path before they are simultaneously received by the ground stations. The difference of Doppler shift encountered by ea...

TGV sinogram inpainting for limited angle tomography

X-ray computed tomography (CT) plays a very important role in daily biomedical practice for diagnosis and therapy, and in materials science for accurate data analysis and quality control. Besides accurate and robust image reconstruction, there is a growing interest in methods for limited angle tomography. The idea is to reduce the X-ray dose delivered to patients or to cope with physical angle ...

Weight factors for limited angle photoacoustic tomography.

Photoacoustic tomography (PAT) is based on the generation of ultrasound waves by heating an object with short light pulses. A three-dimensional image of the distribution of absorbed energy within the object is reconstructed from signals measured around the object with either point-like or extended, linear sensors. Limited angle artefacts arise when the curve or surface connecting neighbouring d...

Constrained sinogram restoration for limited-angle tomography