The authors acknowledge support from the American Heart Association (0735136N), Dana Foundation, National Science Foundation (CBET/0737731), and the Coulter Foundation.

1. Imaging Setup
<ol>
<li>A camera with a macro zoom lens should be mounted to a vertical stage or surgical microscope (Instead of a macro zoom lens, a microscope objective and lens or a simple two lens system could be used depending on the desired magnification).</li>
<li>Download appropriate software from our website to control the camera (<a href="http://bach.bme.utexas.edu/mediawiki/index.php/Software">http://bach.bme.utexas.edu/mediawiki/index.php/Software</a>).</li>
<li>The camera software should be used to ...

<ol>
	<li>Briers, J. D., Fercher, A. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Retinal+blood-flow+visualization+by+means+of+laser+speckle+photography.">Retinal blood-flow visualization by means of laser speckle photography.</a> Invest. Ophthalmol. Vis. Sci. 22, 255-259 (1982).</li><li>Boas, D. A., Dunn, A. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Laser+speckle+contrast+imaging+in+biomedical+optics.">Laser speckle contrast imaging in biomedical optics.</a> J. Biomed. Opt. 15, 011109-011109 (2010).</li><li>Dunn, A. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Simultaneous+imaging+of+total+cerebral+hemoglobin+concentration,+oxygenation,+and+blood+flow+during+functional+activation.">Simultaneous imaging of total cerebral hemoglobin concentration, oxygenation, and blood flow during functional activation.</a> Opt Lett. 28, 28-30 (2003).</li><li>Devor, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Coupling+of+the+cortical+hemodynamic+response+to+cortical+and+thalamic+neuronal+activity.">Coupling of the cortical hemodynamic response to cortical and thalamic neuronal activity.</a> Proc Natl Acad Sci U S A. 102, 3822-3827 (2005).</li><li>Ayata, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pronounced+hypoperfusion+during+spreading+depression+in+mouse+cortex.">Pronounced hypoperfusion during spreading depression in mouse cortex.</a> J Cereb Blood Flow Metab. 24, 1172-1182 (2004).</li><li>Jones, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Simultaneous+multispectral+reflectance+imaging+and+laser+speckle+flowmetry+of+cerebral+blood+flow+and+oxygen+metabolism+in+focal+cerebral+ischemia.">Simultaneous multispectral reflectance imaging and laser speckle flowmetry of cerebral blood flow and oxygen metabolism in focal cerebral ischemia.</a> J. Biomed. Opt. 13, (2008).</li><li>Dunn, A. K., Bolay, H., Moskowitz, M. A., Boas, D. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dynamic+imaging+of+cerebral+blood+flow+using+laser+speckle.">Dynamic imaging of cerebral blood flow using laser speckle.</a> J Cereb Blood Flow Metab. 21, 195-201 (2001).</li><li>Dunn, A. K., Devor, A., Dale, A. M., Boas, D. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spatial+extent+of+oxygen+metabolism+and+hemodynamic+changes+during+functional+activation+of+the+rat+somatosensory+cortex.">Spatial extent of oxygen metabolism and hemodynamic changes during functional activation of the rat somatosensory cortex.</a> Neuroimage. 27, 279-290 (2005).</li><li>Farkas, E., Bari, F., Obrenovitch, T. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Multi-modal+imaging+of+anoxic+depolarization+and+hemodynamic+changes+induced+by+cardiac+arrest+in+the+rat+cerebral+cortex.">Multi-modal imaging of anoxic depolarization and hemodynamic changes induced by cardiac arrest in the rat cerebral cortex.</a> Neuroimage. 51, 734-742 (2010).</li><li>Sakadzic, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Simultaneous+imaging+of+cerebral+partial+pressure+of+oxygen+and+blood+flow+during+functional+activation+and+cortical+spreading+depression.">Simultaneous imaging of cerebral partial pressure of oxygen and blood flow during functional activation and cortical spreading depression.</a> Appl. Opt. 48, (2009).</li><li>Ponticorvo, A., Dunn, A. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Simultaneous+imaging+of+oxygen+tension+and+blood+flow+in+animals+using+a+digital+micromirror+device.">Simultaneous imaging of oxygen tension and blood flow in animals using a digital micromirror device.</a> Opt Express. 18, 8160-8170 (2010).</li></ol>

In this video we have demonstrated how easy it is to build and use a laser speckle contrast imaging (LSCI) system to look at changes in blood flow. LSCI was developed in the 1980s as a way to generate maps of blood flow in the retina1. While still used to image the retina and skin perfusion, it has become extremely popular as a technique to image blood flow in the brain2. This is largely due to the excellent spatial and temporal resolution provided and the simplicity of the instrumentation. LSCI h...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">	
		
		<div>
		<table border="1">
		<thead>
		<tr>
		<th>Material Name</th>
		<th>Type</th>
		<th>Company</th>
		<th>Catalogue Number</th>
		<th>Comment</th>
		</tr>
		</thead>
		<tbody>
		
<tr>
<td>Firewire camera</td>
<td>&nbsp;</td>
<td>Basler</td>
<td>scA640-74f</td>
<td>&nbsp;</td>
<tr>
<td>Macro zoom lens</td>
<td>&nbsp;</td>
<td>Edmund Optics</td>
<td>NT58-240</td>
<td>&nbsp;</td>
<tr>
<td>Laser diode</td>
<td>&nbsp;</td>
<td>Thorlabs</td>
<td>HL6501MG</td>
<td>&nbsp;</td>
<tr>
<td>Laser diode controller</td>
<td>&nbsp;</td>
<td>Thorlabs</td>
<td>LDC201CU</td>
<td>&nbsp;</td>		</tbody>
		</table>
		</div>
			<div>
			The technique is versatile enough to be used with a wide range of equipment. The only things necessary to perform the experiment are a compatible camera with a lens, a laser diode of any type with a controller, and the provided software. A table of the specific equipment used in the video is included above.
A complete list of additional parts that can be used in this experiment is found on our website, <a href="http://bach.bme.utexas.edu/mediawiki/index.php/Hardware">http://bach.bme.utexas.edu/mediawiki/index.php/Hardware</a>		</div>

how to build a laser speckle contrast imaging (lsci) system to monitor blood flow

Laser Speckle Contrast Imaging (LSCI) is a simple yet powerful technique that is used for full-field imaging of blood flow. The technique analyzes fluctuations in a dynamic speckle pattern to detect the movement of particles similar to how laser Doppler analyzes frequency shifts to determine particle speed. Because it can be used to monitor the movement of red blood cells, LSCI has become a popular tool for measuring blood flow in tissues such as the retina, skin, and brain. It has become especially useful in neuroscience where blood flow changes during physiological events like functional activation, stroke, and spreading depolarization can be quantified. LSCI is also attractive because it provides excellent spatial and temporal resolution while using inexpensive instrumentation that can easily be combined with other imaging modalities. Here we show how to build a LSCI setup and demonstrate its ability to monitor blood flow changes in the brain during an animal experiment.

Watch this Scientific Journal Video about How to Build a Laser Speckle Contrast Imaging LSCI System to Monitor Blood Flow at JoVE.com

How to Build a Laser Speckle Contrast Imaging LSCI System to Monitor Blood Flow

This video demonstrates how to build a Laser Speckle Contrast Imaging (LSCI) system that can easily be used to monitor blood flow.

How to Build a Laser Speckle Contrast Imaging (LSCI) System to Monitor Blood Flow

Laser Speckle Contrast Imaging (LSCI) is a simple yet powerful technique that is used for full-field imaging of blood flow.  The technique analyzes ...

how-to-build-laser-speckle-contrast-imaging-lsci-system-to-monitor

Research

JoVE Journal

Neuroscience

23.3K visualizações.  University of Texas at Austin. Este vídeo demonstra como construir um Laser Speckle Contrast Imaging System (LSCI) que pode facilmente ser usado para monitorar o fluxo sanguíneo.