We describe measurements, models, and algorithms for several signal reconstruction problems arising in the structural biophysics of so-called spherical viruses.

This thesis presents a probabilistic approach to multi view stereo reconstruction from calibrated images. Together with a voxel based world model a Markov Random Field is used to describe the problem of stereo reconstruction as a structural recognition task. A speci c scene representation has been developed for stereo reconstruction with the ability to keep ambiguities within the reconstruction...

High-resolution three-dimensional (3D) cardiovascular magnetic resonance (CMR) is a valuable medical imaging technique, but its widespread application in clinical practice is hampered by long acquisition times. Here we present a novel compressed sensing (CS) reconstruction approach using shearlets as a sparsifying transform allowing for fast 3D CMR (3DShearCS). Shearlets are mathematically opti...

For complicated structural components characterized by wide X-ray attenuation ranges, the conventional computed tomography (CT) imaging using a single tube-voltage at each rotation angle cannot obtain all structural information. This limitation results in a shortage of CT information, because the effective thickness of the components along the direction of X-ray penetration exceeds the limitati...

background: the technique most frequently employed for breast reconstruction, either immediate (ibr) or delayed (dbr), is the insertion of a prosthesis. the placement of a foreign body always carries the risk, albeit small, of peri-prosthetic infection and exposure of the implant that necessitates its removal, signaling the temporary or permanent failure of the reconstruction. methods: we retro...

injuries to the posterolateral corner (plc) comprise a significant portion of knee ligament injuries. a high index of suspicion is necessary when evaluating the injured knee to detect these sometimes occult injuries. moreover, a thorough physical examination and a comprehensive review of radiographic studies are necessary to identify these injuries. in this sense, stress radiographs can help to...

Recclltly we proposed a 3D reconstruction algorithm based upon Fourier analysis using Cartesian coordinates. In this algorithm thc computations to determine the values of the 3D Discrete Fourier Transforms of the density of an asymmetric object could be naturally distributed over the nodes of a parallel system. Now we present an improvement of this algorithm which, for reconstruction at poinls ...

For complicated structural components with wide x-ray attenuation ranges, conventional fixed-energy computed tomography (CT) imaging cannot obtain all the structural information. This limitation results in a shortage of CT information because the effective thickness of the components along the direction of x-ray penetration exceeds the limit of the dynamic range of the x-ray imaging system. To ...