Results 51 to 60 of about 1,807,104 (196)
Endoscopic photoacoustic microscopy [PDF]
SPIE Proceedings, 2009 ABSTRACT We present a concept and system implementation for endoscopic photoacoustic microscopy that enables minimally invasive diagnosis of internal organs. The system incorporates an in-house made single element ultrasonic transducer for photoacoustic signal detection and an optical fiber for light delivery into a tubular probe with a mechanical ...
Yang, Joon-Mo +4 more
openaire +2 more sources
Photoacoustics, 2020 Among the numerous endogenous biological molecules, information on lipids is highly coveted for understanding both aspects of developmental biology and research in fatal chronic diseases.
Manoj K. Dasa +12 more
doaj +1 more source
Fast label-free multilayered histology-like imaging of human breast cancer by photoacoustic microscopy [PDF]
, 2017 The goal of breast-conserving surgery is to completely remove all of the cancer. Currently, no intraoperative tools can microscopically analyze the entire lumpectomy specimen, which results in 20 to 60% of patients undergoing second surgeries to achieve ...
Aft, Rebecca L +7 more
core +3 more sources
Pure optical photoacoustic microscopy
Optics Express, 2011 The concept of pure optical photoacoustic microscopy(POPAM) was proposed based on optical rastering of a focused excitation beam and optically sensing the photoacoustic signal using a microring resonator fabricated by a nanoimprinting technique.
Xie, Zhixing +5 more
openaire +2 more sources
Fiber laser technologies for photoacoustic microscopy
Visual Computing for Industry, Biomedicine, and Art, 2021 Fiber laser technology has experienced a rapid growth over the past decade owing to increased applications in precision measurement and optical testing, medical care, and industrial applications, including laser welding, cleaning, and manufacturing.
Long Jin, Yizhi Liang
doaj +1 more source
In vivo super-resolution photoacoustic computed tomography by localization of single dyed droplets [PDF]
, 2020 The spatial resolution of photoacoustic (PA) computed tomography (PACT) is limited by acoustic diffraction. Here, we report in vivo superresolution PACT, which breaks the acoustic diffraction limit by localizing the centers of single dyed droplets.
Li, Lei, Wang, Lihong V., Zhang, Pengfei
core
High-speed photoacoustic microscopy: A review dedicated on light sources
Photoacoustics, 2021 In recent years, many methods have been investigated to improve imaging speed in photoacoustic microscopy (PAM). These methods mainly focused upon three critical factors contributing to fast PAM: laser pulse repetition rate, scanning speed, and computing
Soon-Woo Cho +9 more
semanticscholar +1 more source
Photoacoustic shadow-casting microscopy
Optics Letters, 2019 We present photoacoustic shadow-casting microscopy (PASM), a technique that allows high-resolution imaging of weakly absorbing biological samples with unprecedented sensitivity. In PASM, a uniform optical absorbing layer is placed in contact with the samples and is excited by the light transmitted through the sample, producing photoacoustic (PA) waves ...
Jorge Tordera, Mora +2 more
openaire +2 more sources
Label-free high-throughput photoacoustic tomography of suspected circulating melanoma tumor cells in patients in vivo [PDF]
, 2020 Significance: Detection and characterization of circulating tumor cells (CTCs), a key determinant of metastasis, are critical for determining risk of disease progression, understanding metastatic pathways, and facilitating early clinical intervention.
Cornelius, Lynn A. +6 more
core +1 more source
Fully integrated photoacoustic microscopy and photoplethysmography of human in vivo
Photoacoustics, 2022 Photoacoustic microscopy (PAM) is used to visualize blood vessels and to monitor their time-dependent changes. Photoplethysmography (PPG) measures hemodynamic time-series changes such as heart rate.
Joongho Ahn +9 more
semanticscholar +1 more source