Computational Laser Speckle Contrast Imaging in Endoscopic System
نویسندگان
چکیده
We demonstrate an endoscopic imaging system for microscopic flow measurement (for example blood flow in tissue) using laser speckle contrast imaging. Computational imaging is used to reject sub-surface scattering and eliminates erroneous flow speed estimation. OCIS codes: (110.6150) Speckle imaging; (110.1758) Computational imaging; (170.2150) Endoscopic imaging
منابع مشابه
A Registration Approach to Endoscopic Laser Speckle Contrast Imaging for Intrauterine Visualisation of Placental Vessels
Intrauterine interventions such as twin-to-twin transfusion syndrome procedure require accurate mapping of the fetal placental vasculature to ensure complete photocoagulation of vascular anastomoses. However, surgeons are currently limited to fetoscopy and external ultrasound imaging, which are unable to accurately identify all vessels especially those that are narrow and at the periphery. Lase...
متن کاملMonitoring blood-flow in the mouse cochlea using an endoscopic laser speckle contrast imaging system
Laser speckle contrast imaging (LSCI) enables continuous high-resolution assessment of microcirculation in real-time. We applied an endoscope to LSCI to measure cochlear blood-flow in an ischemia-reperfusion mouse model. We also explored whether using xenon light in combination with LSCI facilitates visualization of anatomical position. Based on a previous preliminary study, the appropriate wav...
متن کاملSimultaneous measurement of water flow velocity with fluorescent and speckle imaging technique
The average velocity of water flow has been simultaneously measured with fluorescent and speckle imaging methods. The measured velocities with two methods are in good agreement with each other and it confirms that the speckle imaging method can be used as a confident method to measure the velocity of water flow in a dry leaf. Also the velocity of water flow through thick and thin xylems of a le...
متن کاملAssessment of incident intensity on laser speckle contrast imaging using a nematic liquid crystal spatial light modulator.
Before laser speckle contrast imaging (LSCI) can be used reliably and quantitatively in a clinical setting, there are several theoretical and practical issues that still must be addressed. In order to address some of these issues, an electro-optical system that utilizes a nematic liquid crystal spatial light modulator (SLM) to mimic LSCI experiments was assembled. The focus of this paper is to ...
متن کاملRapid multiexposure in vivo brain imaging system using vertical cavity surface emitting lasers as a light source.
We demonstrate an imaging technique implementing vertical cavity lasers with extremely low transient times for a greatly simplified realization of a multiexposure laser speckle contrast imaging system. Data from multiexposure laser speckle imaging was observed to more closely agree with absolute velocity measurements using time of flight technique, when compared to long-exposure laser speckle i...
متن کامل