Results 21 to 30 of about 745 (158)
Quantitative photoacoustic imaging: correcting for heterogeneous light fluence distributions using diffuse optical tomography [PDF]
, 2011 The specificity of molecular and functional photoacoustic (PA) images depends on the accuracy of the photoacoustic absorption spectroscopy. The PA signal is proportional to the product of the optical absorption coefficient and local light fluence ...
Bauer, Adam Q. +4 more
core +1 more source
High energy supercontinuum sources using tapered photonic crystal fibers for multispectral photoacoustic microscopy [PDF]
, 2016 We demonstrate a record bandwidth high energy supercontinuum source suitable for multispectral photoacoustic microscopy. The source has more than 150 nJ?10 nm bandwidth over a spectral range of 500 to 1600 nm.
Adrian Podoleanu +10 more
core +2 more sources
Review of Scientific Instruments, 2023 Time-resolved optical pump–probe experiments enable the study of complex light–matter interactions on ultrafast timescales, provided that they reach sufficient sensitivity. For instance, with pump-induced ultrafast photoacoustics, probing the typically small changes in optical properties requires a high signal-to-noise ratio.
M. C. Velsink +3 more
openaire +4 more sources
NeuroImage, 2021 Revealing the structural and functional change of microvasculature is essential to match vascular response with neuronal activities in the investigation of neurovascular coupling. The increasing use of rhesus models in fundamental and clinical studies of neurovascular coupling presents an emerging need for a new imaging modality.
Wei Qin +6 more
openaire +3 more sources
Characterisation of a phantom for multiwavelength quantitative photoacoustic imaging [PDF]
, 2016 Quantitative photoacoustic imaging (qPAI) has the potential to provide high- resolution in vivo images of chromophore concentration, which may be indicative of tissue function and pathology.
Beard, PC +3 more
core +1 more source
Photoacoustic effect measurement in aqueous suspensions of gold nanorods caused by low-frequency and low-power near-infrared pulsing laser irradiation [PDF]
, 2013 When aqueous suspensions of gold nanorods are irradiated with a pulsing laser (808 nm), pressure waves appear even at low frequencies (pulse repetition rate of 25 kHz).
Fernández Caballero, Carlos +4 more
core +3 more sources
Design of ultrafast laser-driven microactuator based on photoacoustic mechanism
Optics Express, 2015 In this work, an ultrafast laser-driven microactuator based on the photoacoustic mechanism was proposed with large amplitude and high response frequency. The microactuator was fabricated by LIGA technology. The displacement of the microactuator could be up to 11 μm at resonance state when the repeat frequency was around 14 kHz using a nanosecond pulse ...
F H, Li +6 more
openaire +2 more sources
, 2023 AbstractUnderstanding brain-wide hemodynamic responses to different stimuli at high spatiotemporal resolutions can help study neuro-disorders and brain functions. However, the existing brain imaging technologies have limited resolution, sensitivity, imaging depth and provide information about only one or two hemodynamic parameters.
Haoyang Chen +14 more
openaire +2 more sources
Optical wavelength dependence of photoacoustic signal of gold nanofluid [PDF]
, 2020 We investigate the optical wavelength dependence of the photoacoustic (PA) signal, detected with bandwidth (BW) in the MHz range, of gold nanospheres (NSs) immersed in water upon illumination with ns laser pulses.
Banfi F., Gandolfi M., Glorieux C.
core +2 more sources
Full-view LED-based optoacoustic tomography [PDF]
, 2023 Optoacoustic tomography is commonly performed with bulky and expensive short-pulsed solid-state lasers providing high per-pulse energies in the millijoule range.
Deán-Ben, Xosé Luís +5 more
core +1 more source