Results 281 to 290 of about 1,420,424 (313)
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A novel WFS technique for high-contrast imaging: Phase Sorting Interferometry (PSI)
SPIE Proceedings, 2008High-contrast adaptive optics (AO) observations near stars have to contend with the telescope's diffraction halo, a rapidly-changing cloud of residual atmospheric speckles, and a host of faint but persistent quasi-static speckles caused by various imperfections and aberrations.
Johanan L. Codona +2 more
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Multiplicative-regularized subspace technique to solve high contrast inverse scattering problems
2016 Progress in Electromagnetic Research Symposium (PIERS), 2016In this talk, we will propose a new optimization scheme for solving electromagnetic inverse scattering problems. In the inverse scattering problemthe physical properties of hidden targets, i.e., the permittivity and/or permeability can be retrieve from the measured scattering data excited by several incidences.
Kuiwen Xu, Yu Zhong, null Gaofeng Wang
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The British Journal of Radiology, 1962
The first consideration in planning radiotherapeutic techniques has always been to raise the tumour to a cancericidal dose and spare the normal tissue. The next consideration is to do this accurately, and easily; that is to say with as little discomfort as possible for the patient and in a manner that is not beyond the scope and endurance of the ...
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The first consideration in planning radiotherapeutic techniques has always been to raise the tumour to a cancericidal dose and spare the normal tissue. The next consideration is to do this accurately, and easily; that is to say with as little discomfort as possible for the patient and in a manner that is not beyond the scope and endurance of the ...
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Acoustic angiography: a new high frequency contrast ultrasound technique for biomedical imaging
SPIE Proceedings, 2016Acoustic Angiography is a new approach to high-resolution contrast enhanced ultrasound imaging enabled by ultra-broadband transducer designs. The high frequency imaging technique provides signal separation from tissue which does not produce significant harmonics in the same frequency range, as well as high resolution.
Sarah E. Shelton +8 more
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2009 IEEE International Workshop on Imaging Systems and Techniques, 2009
Backscattered laser beam contributions from biological fluids doped with optically active molecules were measured utilizing single-detection autobalanced polarimetric detection principles. The outcome of this study indicates that both the Detective Quantum Efficiency (DQE) and the Degree of Linear polarization (DOLP) of backscattered optical signals ...
George C. Giakos +9 more
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Backscattered laser beam contributions from biological fluids doped with optically active molecules were measured utilizing single-detection autobalanced polarimetric detection principles. The outcome of this study indicates that both the Detective Quantum Efficiency (DQE) and the Degree of Linear polarization (DOLP) of backscattered optical signals ...
George C. Giakos +9 more
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Study on Contrast Enhancement Techniques for High Contrast and Low Contrast Images
Journal of Advanced Research in Dynamical and Control Systems, 2019V.S. Padmavathy, Dr.R. Priya
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A new technique for contactless current contrast imaging of high frequency signals
Microelectronics Reliability, 2003Frank Seifert +3 more
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Measurement techniques for the high-contrast and in-field stray light performance of OCI
Sensors, Systems, and Next-Generation Satellites XXVII, 2023Joseph J. Knuble +11 more
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TECHNIQUES FOR HIGH PRECISION MEASUREMENTS OF PHYSICAL PARAMETERS OF ULTRASONIC CONTRAST AGENTS
ASAIO Journal, 1996Christopher S. Hall +4 more
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