منابع مشابه
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Real-time three-dimensional (3D) high-resolution ultrasound imaging requires 2D phased arrays operating at frequencies higher than 50 MHz, which poses a great challenge for piezoelectric technologies. A promising alternative is an optoacoustic array relying on optical generation and detection of ultrasound. We present an all-optical ultrasound transducer, which consists of a 2D gold nanostructu...
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Type Ia supernovae (SNe Ia) can be calibrated to be good standard candles at cosmological distances. However, at z > ∼ 1, gravitational lensing leads to significant level of noise in a SN Hubble diagram. We propose a pencil beam survey of SNe Ia which would yield a significant number of SNe in redshift bins of 0.1 for z up to 2. The SN number count can provide a direct probe of cosmology which ...
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We use coded aperture x-ray scatter imaging to interrogate scattering targets with a pencil beam. Observations from a single x-ray exposure of a flat-panel scintillation detector are used to simultaneously determine the along-beam positions and momentum transfer profiles of two crystalline powders (NaCl and Al). The system operates with a 3 cm range resolution and a momentum transfer resolution...
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ژورنال
عنوان ژورنال: Biomedical Optics Express
سال: 2016
ISSN: 2156-7085,2156-7085
DOI: 10.1364/boe.7.003696