Results 231 to 240 of about 12,346,737 (289)
Some of the next articles are maybe not open access.
Elemental image array generation algorithm with accurate depth information for integral imaging
Applied Optics, 2021In integral imaging, reproducing the depth information of three-dimensional (3D) objects accurately is one of the goals of scientific researchers. Based on the existing research, this paper proposes a new, to the best of our knowledge, elemental image array (EIA) generation algorithm, which does not need to know the depth information of the spatial ...
Yan, Mao +7 more
openaire +2 more sources
Blocked element compensation in phased array imaging
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1993In clinical applications using large apertures, a significant number of phased array elements may be blocked due to discontinuous acoustic windows into the body. These blocked elements produce undesired beamforming artifacts, degrading spatial and contrast resolution.
P C, Li +3 more
openaire +2 more sources
Advances in passive imaging elements with micromirror array
SPIE Proceedings, 2008We have proposed a new passive imaging optics which consists of a grid array of micro roof mirrors working as dihedral corner reflectors. Although this element forms mirror-like images at opposite side of objects, the images are real. Because the imaging principle of the proposed element is based on accumulation of rays, the design of each light path ...
Satoshi Maekawa +2 more
openaire +1 more source
128 Element ultrasound array for transcranial imaging
2010 IEEE International Ultrasonics Symposium, 2010The medical potential of transcranial ultrasound has been severely limited by strong attenuation and scattering by the skull, which has prevented its use through most regions of the bone. We have been investigating methods to image through these areas by applying various encoding approaches at reduced frequency, thus reducing both absorption and ...
F. Can Meral, Gregory T. Clement
openaire +1 more source
Synthetic-aperture sonar imaging with a multiple-element receiver array
IEEE International Conference on Acoustics Speech and Signal Processing, 1993The application of synthetic aperture techniques in sonar imaging of the ocean floor has been limited by sonar platform instability. The authors present a robust algorithm for motion estimation and compensation to perform synthetic aperture image formation.
Brett L. Douglas, Hua Lee
openaire +2 more sources
Rectangular 1014 element matrix array for transperineal imaging
2021 IEEE International Ultrasonics Symposium (IUS), 2021We developed a 2D matrix array for later use in transperineal volumetric ultrasound imaging in the context of radiation dose monitoring. In the envisioned applications, radiation-sensitive microbubbles shall induce changes in the (spectral) reflection behavior of ultrasonic waves.
Speicher, Daniel +4 more
openaire +1 more source
Generation of elemental image array based on photon mapping
Optoelectronic Imaging and Multimedia Technology VI, 2019Shigang Wang
exaly +2 more sources
Log-converting processor element for CCD linear imaging arrays
Applied Optics, 1983A photosensor element suitable for incorporation into charge-coupled device (CCD) imaging arrays in which the charge injected into the CCD is proportional to the logarithm of incident light intensity is presented. The photosensor element consists of a photodiode directly coupled to a two-stage MOSFET common source amplifier.
S H, Chang, J T, Boyd
openaire +2 more sources
SMASH imaging with an eight element multiplexed RF coil array
Magma: Magnetic Resonance Materials in Physics, Biology, and Medicine, 2000SMASH (SiMultaneous Acquisition of Spatial Harmonics) is a technique which can be used to acquire multiple lines of k-space in parallel, by using spatial information from a radiofrequency coil array to perform some of the encoding normally produced by gradients.
J A, Bankson +3 more
openaire +2 more sources