A transmissive laser speckle imaging technique for measuring deep tissue blood flow: An example application in finger joints

2011 ◽  
Vol 43 (1) ◽  
pp. 21-28 ◽  
Author(s):  
J.F. Dunn ◽  
K.R. Forrester ◽  
L. Martin ◽  
J. Tulip ◽  
R.C. Bray
Keyword(s):  
Blood Flow ◽  
Imaging Technique ◽  
Laser Speckle ◽  
Tissue Blood Flow ◽  
Deep Tissue ◽  
Laser Speckle Imaging ◽  
Speckle Imaging ◽  
Finger Joints

Endoscopic laser speckle imaging of tissue blood flow: Applications in the human knee

2006 ◽  
Vol 24 (8) ◽  
pp. 1650-1659 ◽  
Author(s):  
R. C. Bray ◽  
K. R. Forrester ◽  
J. Reed ◽  
C. Leonard ◽  
J. Tulip
Keyword(s):  
Blood Flow ◽  
Laser Speckle ◽  
Tissue Blood Flow ◽  
Laser Speckle Imaging ◽  
Speckle Imaging ◽  
Human Knee ◽  
Endoscopic Laser

scholarly journals Low Cost Laser Speckle Imaging System for Blood Flow Assessment

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1413-1419
Keyword(s):  
Blood Flow ◽  
Imaging System ◽  
Low Cost ◽  
Laser Speckle ◽  
Laser Source ◽  
Tissue Blood Flow ◽  
Laser Speckle Imaging ◽  
Speckle Imaging ◽  
Experimental Conditions ◽  
Flow Perfusion

This paper aims to demonstrate the feasibility of using a low cost laser speckle imaging built for the detection of changes of tissue blood flow with different experimental conditions. Images of anterior portion of the wrist of four healthy adult volunteers illuminated by a laser source of wavelength 650 nm were collected via a monochromatic charge-coupled device (CCD) imager. The mean and standard deviation (SD) of blood flow perfusion was predicted as 3.92 ± 1.47 and 2.90 ± 1.39, respectively, for measurements at rest condition and during blood flow occlusion. This work showed the ability of the developed system to detect changes in blood flow perfusion with differences in the experimental conditions. However, further works are required to further confirm the suitability of the system before it is used for different clinical applications such as monitoring of blood flow during diabetic foot ulcers healing following standard medical treatment.

scholarly journals Fourier transforms for fast and quantitative Laser Speckle Imaging

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
J. Buijs ◽  
J. van der Gucht ◽  
J. Sprakel
Keyword(s):  
Quantitative Data ◽  
Fourier Transforms ◽  
Imaging Technique ◽  
Laser Speckle ◽  
Frequency Range ◽  
Laser Speckle Imaging ◽  
Speckle Imaging ◽  
New Approach ◽  
Speckle Patterns ◽  
New Processing

Abstract Laser speckle imaging is a powerful imaging technique that visualizes microscopic motion within turbid materials. At current two methods are widely used to analyze speckle data: one is fast but qualitative, the other quantitative but computationally expensive. We have developed a new processing algorithm based on the fast Fourier transform, which converts raw speckle patterns into maps of microscopic motion and is both fast and quantitative, providing a dynamnic spectrum of the material over a frequency range spanning several decades. In this article we show how to apply this algorithm and how to measure a diffusion coefficient with it. We show that this method is quantitative and several orders of magnitude faster than the existing quantitative method. Finally we harness the potential of this new approach by constructing a portable laser speckle imaging setup that performs quantitative data processing in real-time on a tablet.

Laser Speckle Imaging of Cerebral Blood Flow

2004 ◽  
pp. 165-195 ◽  
Author(s):  
Qingming Luo ◽  
Haiying Cheng ◽  
Zheng Wang ◽  
Valery V. Tuchin
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Laser Speckle ◽  
Laser Speckle Imaging ◽  
Speckle Imaging

scholarly journals Functional laser speckle imaging of cerebral blood flow under hypothermia

2011 ◽  
Vol 16 (8) ◽  
pp. 086011 ◽  
Author(s):  
Minheng Li ◽  
Peng Miao ◽  
Yisheng Zhu ◽  
Shanbao Tong
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Laser Speckle ◽  
Laser Speckle Imaging ◽  
Speckle Imaging
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