We propose an alternative method for solving the Transport of Intensity equation (TIE) from a
stack of through–focus intensity images taken by a microscope or lensless imager. Our …

The traditional theories of cell volume regulation focus on monovalent ions and small
organic osmolytes. The main subject of this review is macromolecular content of the cell and …

X-ray phase contrast imaging offers higher sensitivity compared to conventional X-ray
attenuation imaging and can be simply implemented by propagation when using a partially …

We develop and implement a compressive reconstruction method for tomographic recovery
of refractive index distribution for weakly attenuating objects in a microfocus x-ray system …

Propagation-based X-ray phase contrast enables nanoscale imaging of biological tissue by
probing not only the attenuation but also the real part of the refractive index of the sample …

The transport of intensity equation (TIE) is a phase retrieval method that relies on
measurements of the intensity of a paraxial field under propagation between two or more …

We present an alternative numerical reconstruction algorithm for direct tomographic
reconstruction of a sample's refractive indices from the measured intensities of its far-field …

We propose a nonlinear primal–dual algorithm for the retrieval of phase shift and absorption
from a single x ray in-line phase contrast, or Fresnel diffraction, image. The algorithm permits …

Restoration of images degraded by blurring and impulse noise has received considerable
attention recently. Guo et al.(2009) proposed a fast l 1-total variation algorithm for grayscale …

Propagation-based phase-contrast tomography has become a valuable tool for visualization
of three-dimensional biological samples, due to its high sensitivity and its potential in …