Results 11 to 20 of about 3,896,846 (293)

Frame Combination Techniques for Ultra High-Contrast Imaging [PDF]

SPIE Proceedings, 2008
We summarize here an experimental frame combination pipeline we developed for ultra high-contrast imaging with systems like the upcoming VLT SPHERE instrument. The pipeline combines strategies from the Drizzle technique, the Spitzer IRACproc package, and
Beuzit, Jean-Luc, Carson, Joseph C., Desidera, Silvano, Feldt, Markus, Joos, Franco, Langlois, Maud, Mouillet, David   +6 more
core   +3 more sources

Angular Differential Imaging: A Powerful High‐Contrast Imaging Technique [PDF]

The Astrophysical Journal, 2006
Angular differential imaging is a high-contrast imaging technique that reduces quasi-static speckle noise and facilitates the detection of nearby companions. A sequence of images is acquired with an altitude/azimuth telescope while the instrument field derotator is switched off.
Marois, C, Lafreniere, D, Doyon, R, Macintosh, B, Nadeau, D   +4 more
openaire   +2 more sources

Temporal contrast reduction techniques for high dynamic-range temporal contrast measurement

Optics Express, 2019
A single-shot characterization of the temporal contrast of a petawatt laser pulse with a high dynamic-range, is important not only for improving conditions of the petawatt laser facility itself, but also for various high-intensity laser physics experiments, which is still a difficult problem. In this study, a new idea for improving the dynamic-range of
Xiong, Shen, Peng, Wang, Jingxin, Zhu, Zhe, Si, Yuxia, Zhao, Jun, Liu, Ruxin, Li   +6 more
openaire   +2 more sources

Low radiation dose in computed tomography: the role of iodine [PDF]

, 2017
Recent approaches to reducing radiation exposure during CT examinations typically utilize automated dose modulation strategies on the basis of lower tube voltage combined with iterative reconstruction and other dose-saving techniques.
Albrecht, Thomas, Aschoff, Andrik J, Catalano, Carlo, Kirchin, Miles A, Krix, Martin   +4 more
core   +1 more source

A new class of smart gadolinium contrast agent for tissue pH probing using magnetic resonance imaging [PDF]

, 2020
Detecting tissue pH in vivo is extremely vital for medical diagnosis and formulation of treatment decisions. To this end, many investigations have been carried out to develop an accurate and efficient method of in vivo pH measurement.
Achten, Eric, Alhendal, Abdullah, Bhaduri, Sourav, Husain, Ali A, Mouffouk, Fouzi, Serrai, Hacene, Seyyedhamzeh, Mozhdeh, Zourob, Mohammed   +7 more
core   +2 more sources

High contrast microwave tomography using topology optimization techniques

Journal of Computational and Applied Mathematics, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wadbro, Eddie, Berggren, Martin
openaire   +2 more sources

Minimizing contrast media dose in CT pulmonary angiography with high-pitch technique

The British Journal of Radiology, 2020
Objectives: To perform CT pulmonary angiography (CTPA) using a minimal amount of iodinated contrast media. Methods: 47 patients (25 females) with mean age 69 years (range 41–82 years) referred for contrast-enhanced chest CT were prospectively ...
Hanan Alobeidi, Muhammed Alshamari, Jonas Widell, Tomas Eriksson, Mats Lidén   +4 more
openaire   +2 more sources

The Performance of the Robo-AO Laser Guide Star Adaptive Optics System at the Kitt Peak 2.1-m Telescope [PDF]

, 2017
Robo-AO is an autonomous laser guide star adaptive optics system recently commissioned at the Kitt Peak 2.1-m telescope. Now operating every clear night, Robo-AO at the 2.1-m telescope is the first dedicated adaptive optics observatory.
Baranec, Christoph, Duev, Dmitry A., Jensen-Clem, Rebecca, Kulkarni, S. R., Law, Nicholas M., Ramprakash, A. N., Riddle, Reed, Salama, Maïssa   +7 more
core   +3 more sources

REACT – A novel flow-independent non-gated non-contrast MR angiography technique using magnetization-prepared 3D non-balanced dual-echo dixon method: Preliminary clinical experience

European Journal of Radiology Open, 2020
Flow-independent relaxation-based non-contrast MR angiography techniques yield good signal-to-noise ratio and high blood-tissue contrast, complementing non-contrast flow-dependent and contrast-enhanced MR angiography techniques in the assessment of ...
Eu Jin Tan, Shuo Zhang, Prasanna Tirukonda, Le Roy Chong   +3 more
doaj   +1 more source

Morphology of the very inclined debris disk around HD 32297 [PDF]

, 2012
Direct imaging of circumstellar disks at high angular resolution is mandatory to provide morphological information that bring constraints on their properties, in particular the spatial distribution of dust. New techniques combining observing strategy and
A. Boccaletti, A.-L. Maire, A.-M. Lagrange, Augereau, Augereau, Augereau, Boccaletti, Boccaletti, Boccaletti, Boccaletti, Buenzli, Chiang, D. Mawet, D. Mouillet, Debes, Duncan, Gardner, Golimowski, Henyey, J. Lebreton, J. Milli, J.-C. Augereau, Janson, Kalas, Kalas, Kalas, Krivov, Lafrenière, Lagrange, Lagrange, Lebreton, Lecavelier des Etangs, Marois, Marois, Marois, Mawet, Mawet, Moerchen, Ozernoy, P. Baudoz, Perryman, Reche, Riaud, Rouan, Schneider, Schneider, Serabyn, Thalmann, Thébault, Wisdom, Wyatt, Wyatt, Wyatt   +52 more
core   +6 more sources