Virtual motionless photoacoustic microscopy for large-scale and high-resolution imaging based on K-Wave

2021 ◽  
Author(s):  
Xianlin Song ◽  
Qicai Zhang ◽  
Kaicheng Yu
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
High Resolution Imaging ◽  
Photoacoustic Microscopy ◽  
Resolution Imaging

scholarly journals GO_3D_OBS – The Nankai Trough-inspired benchmark geomodel for seismic imaging methods assessment and next generation 3D surveys design (version 1.0)

2020 ◽  
Author(s):  
Andrzej Górszczyk ◽  
Stéphane Operto
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Nankai Trough ◽  
Regional Scale ◽  
Waveform Inversion ◽  
Leading Edge ◽  
High Resolution Imaging ◽  
Ocean Bottom ◽  
Next Generation ◽  
Resolution Imaging

Abstract. Detailed reconstruction of deep crustal targets by seismic methods remains a long-standing challenge. One key to address this challenge is the joint development of new seismic acquisition systems and leading-edge processing techniques. In marine environments, controlled-source seismic surveys at regional scale are typically carried out with sparse arrays of ocean bottom seismometers (OBSs), which provide incomplete and down-sampled subsurface illumination. To assess and minimize the acquisition footprint in high-resolution imaging process such as full waveform inversion, realistic crustal-scale benchmark models are clearly required.The deficiency of such models prompts us to build one and release it freely to the geophysical community. Here we introduce GO_3D_OBS – a 3D high-resolution geomodel representing a subduction zone, inspired by the geology of the Nankai Trough. The 175 km x 100 km x 30 km model integrates complex geological structures with a visco-elastic isotropic parametrization. It is defined in form of a uniform Cartesian grid containing 33.6e9 degrees of freedom for a grid interval of 25 m. The size of the model raises significant high-performance computing challenges to tackle large-scale forward propagation simulations and related inverse problems. We describe the workflow designed to implement all the model ingredients including 2D structural segments, their projection into the third dimension, stochastic components and physical parametrisation. Various wavefield simulations we present clearly reflect in the seismograms the structural complexity of the model and the footprint of different physical approximations. This benchmark model shall help to optimize the design of next generation 3D academic surveys – in particular but not only long-offset OBS experiments – to mitigate the acquisition footprint during high-resolution imaging of the deep crust.

scholarly journals GO_3D_OBS: the multi-parameter benchmark geomodel for seismic imaging method assessment and next-generation 3D survey design (version 1.0)

2021 ◽  
Vol 14 (3) ◽  
pp. 1773-1799
Author(s):  
Andrzej Górszczyk ◽  
Stéphane Operto
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Survey Design ◽  
Regional Scale ◽  
Leading Edge ◽  
Imaging Method ◽  
High Resolution Imaging ◽  
Ocean Bottom ◽  
Next Generation ◽  
Resolution Imaging

Abstract. Detailed reconstruction of deep crustal targets by seismic methods remains a long-standing challenge. One key to address this challenge is the joint development of new seismic acquisition systems and leading-edge processing techniques. In marine environments, controlled-source seismic surveys at a regional scale are typically carried out with sparse arrays of ocean bottom seismometers (OBSs), which provide incomplete and down-sampled subsurface illumination. To assess and minimize the acquisition footprint in high-resolution imaging process such as full waveform inversion, realistic crustal-scale benchmark models are clearly required. The deficiency of such models prompts us to build one and release it freely to the geophysical community. Here, we introduce GO_3D_OBS – a 3D high-resolution geomodel representing a subduction zone, inspired by the geology of the Nankai Trough. The 175km×100km×30km model integrates complex geological structures with a viscoelastic isotropic parameterization. It is defined in the form of a uniform Cartesian grid containing ∼33.6e9 degrees of freedom for a grid interval of 25 m. The size of the model raises significant high-performance computing challenges to tackle large-scale forward propagation simulations and related inverse problems. We describe the workflow designed to implement all the model ingredients including 2D structural segments, their projection into the third dimension, stochastic components, and physical parameterization. Various wavefield simulations that we present clearly reflect in the seismograms the structural complexity of the model and the footprint of different physical approximations. This benchmark model is intended to help to optimize the design of next-generation 3D academic surveys – in particular, but not only, long-offset OBS experiments – to mitigate the acquisition footprint during high-resolution imaging of the deep crust.

scholarly journals Author response: A versatile oblique plane microscope for large-scale and high-resolution imaging of subcellular dynamics

2020 ◽  
Author(s):  
Etai Sapoznik ◽  
Bo-Jui Chang ◽  
Jaewon Huh ◽  
Robert J Ju ◽  
Evgenia V Azarova ◽  
...  
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Author Response ◽  
High Resolution Imaging ◽  
Resolution Imaging
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