Results 211 to 220 of about 11,508 (252)
Some of the next articles are maybe not open access.
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
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
64 Elements two-dimensional piezoelectric array for 3D imaging
Ultrasonics, 2002Ultrasound has a large potential on non-invasive inspection with main applications in medical imaging and non-destructive testing (NDT). The increasing interest in 3D imaging applications leads to investigate new solutions for two-dimensional (2D) ultrasonic arrays with an affordable number of electronic channels without resolution degradation.
M, Akhnak +3 more
openaire +2 more sources
Method of generating orthoscopic elemental image array from sparse camera array
Chinese Optics Letters, 2012We propose a method of generating orthoscopic elemental image array from a sparse camera array. A parallax image array obtained by a sparse camera array provides different perspectives of a real threedimensional (3D) scene, and has all the information the elemental image array needs.
Huan Deng Huan Deng +2 more
openaire +1 more source
Optimization of the Array Element Layout for a Rotating Imaging Interferometer
IEEE Transactions on Antennas and Propagation, 2013In this paper, after a brief review on the working principles of synthetic aperture radiometers exploiting interferometry and mechanical rotation of the antenna, analytical expressions are provided which allow to easily compute the receiving performance of the interferometer starting from given locations of its sensors.
Tommaso Isernia +5 more
openaire +1 more source
Imaging with large-aperture arrays with heterogeneous directive elements
IEEE Symposium on Ultrasonics, 2003, 2004We have developed a new imaging algorithm for optimization of the contrast resolution of large-aperture arrays utilizing directive elements with heterogeneous responses. The algorithm employs depth-dependant pre- and post-beamforming filtering to optimize the SNR of the echo data throughout the imaging field. Sub-aperture processing is also employed to
null Hui Yao, E.S. Ebbini
openaire +1 more source
Large array elements decoding system for ultrasound images
2017 International Conference on Applied System Innovation (ICASI), 2017This new method eliminates the possibility of false triggering in the traditional signal due to mutual cross between the ultrasonic systems. Such as: the second reflection, ultrasonic probe with the angle of the angle shift and other issues. It is the main principle for the probe geometry position after the dislocation.
Jian-Chiun Liou, Wen-Chieh Lin
openaire +1 more source
An integrated multi-element array transducer for ultrasound imaging
Sensors and Actuators A: Physical, 1994Abstract Much progress has been made towards integrating the electronic circuitry associated with either linear or phased ultrasonic array scanning into the hand-held case of the transducer. The number of wires required to connect the transducer back to the display system has been dramatically reduced and the path length between transducer elements ...
J.V. Hatfield +5 more
openaire +1 more source
Imaging with a 16 000-element 2-D array
The Journal of the Acoustical Society of America, 1999Imaging with acoustical lenses in the low MHz frequency range using fully populated 2-D arrays offers the potential for high-resolution, real-time, 3D volume imaging, together with low power and low cost. A 2-D composite-piezoelectric receiver array bonded directly to a large custom-integrated circuit is the enabling technology for a new implementation
Ken Erikson, Tim White
openaire +1 more source
A 15 element imaging binary array for 100 GHz
IEEE International Digest on Microwave Symposium, 2002A focal plane imaging array receiver which covers the 90-115-GHz range for radio astronomical observations is described. The 3*5 array uses cryogenic Schottky diode mixers with integrated HEMT (high-electron mobility transistor) IF amplifiers. A cold, quasioptical filter selects the correct sideband, and terminates the image at 20 K.
N.R. Erickson +4 more
openaire +1 more source