Results 81 to 90 of about 32,925 (280)
Super-resolution photoacoustic imaging via flow induced absorption fluctuations
, 2017 In deep tissue photoacoustic imaging the spatial resolution is inherently limited by the acoustic wavelength. We present an approach for surpassing the acoustic diffraction limit by exploiting temporal fluctuations in the sample absorption distribution ...
Arnal, Bastien +4 more
core +3 more sources
Speckle‐Engineered Upconversion Amplification in Nanoemulsion‐Templated Hydrogel Microdomes
Advanced Functional Materials, EarlyView.Nanoemulsion‐confined PEGDA microdomes generate speckle‐like excitation fields that strongly amplify upconversion luminescence upon dehydration, enabling filter‐free visible readout with reversible on–off switching. DMD‐based lithography yields scalable, shape‐programmable arrays for moisture‐responsive displays and optical encryption.
Chaeyeong Ryu +13 more
wiley +1 more source
Non-invasive imaging of microcirculation: a technology review
Medical Devices: Evidence and Research, 2014 Sam Eriksson,1,2 Jan Nilsson,1,2 Christian Sturesson1,2 1Department of Surgery, Clinical Sciences Lund, Lund University, 2Skåne University Hospital, Lund, Sweden Abstract: Microcirculation plays a crucial role in physiological processes of tissue ...
Eriksson S, Nilsson J, Sturesson C
doaj
, 2018 Ghost imaging is an unconventional optical imaging technique that reconstructs the shape of an object combining the measurement of two signals: one that interacted with the object, but without any spatial information, the other containing spatial ...
Bertolotti, Jacopo +6 more
core +3 more sources
Handheld laser speckle contrast perfusion imaging [PDF]
, 2021 Laser speckle contrast imaging (LSCI) is a noninvasive method for evaluation of microcirculatory blood flow. LSCI has a broad medical application such as reconstructive surgery, burns and dermatology. Commercially available LSCI systems are bulky and operate in mounted modality.
openaire +1 more source
Characterization of Atherosclerotic Plaques by Laser Speckle Imaging [PDF]
Circulation, 2005 Background— A method capable of determining atherosclerotic plaque composition and measuring plaque viscoelasticity can provide valuable insight into intrinsic features associated with plaque rupture and can enable the identification of high-risk lesions.
Seemantini K, Nadkarni +9 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.Butterfly wing scales are intricate cuticular functional nanosctructures. This perspective suggests that spatially varying material properties, cytoskeletal constraints, and growth‐driven mechanical instabilities shape the resulting nanoscale architectures created from single cells.
Anupama Prakash +10 more
wiley +1 more source
Physics-Informed Generative Adversarial Networks for Laser Speckle Noise Suppression
SensorsIn high-resolution microscopic imaging, using shorter-wavelength ultraviolet (UV) lasers as illumination sources is a common approach. However, the high spatial coherence of such lasers, combined with the surface roughness of the sample, often introduces
Xiangji Guo +4 more
doaj +1 more source
Particle sizing in rocket motor studies utilizing hologram image processing [PDF]
, 1987 A technique of obtaining particle size information from holograms of combustion products is described. The holograms are obtained with a pulsed ruby laser through windows in a combustion chamber.
Netzer, David, Powers, John
core +1 more source
Compressive imaging of transient absorption dynamics on the femtosecond timescale
, 2019 Femtosecond spectroscopy is an important tool for tracking rapid photoinduced processes in a variety of materials. To spatially map the processes in a sample would substantially expand the capabilities of the method.
Denk, Ondřej +3 more
core +1 more source