Doppler angle and flow velocity mapping by combined Doppler shift and Doppler bandwidth measurements in optical Doppler tomography.


     Related Videos
WIDE ANGLE | Heart of Darfur | PBS
AST 210/EE 213 - Lecture 7 Brewster s angle Multilayer
Testing Orion s Abort Motor - Wide Angle
Basic Wire Bending - Part Five Right Angle Bends
06 - How to set the slant angle of a Curtain Wall - ArchiCAD 12 New Features Tutorial

     Related Hubpages

    Field: Medicine  DOWNLOAD  BOOKMARK REPORT
    •  Doc. Url:    Embed Code: 

    • PubMed  status
      (0) (0 Votes)
      		Views: ()   Date: (2003-7-26)   Pages: ()

    • Author:  Quing Zhu  

    • Abstract:  Accurate estimation of flow velocity requires measurement of Doppler angle, which is not available in general clinical applications. We describe a novel method of direct Doppler angle and flow velocity mapping that uses a conventional single-beam optical Doppler tomography system. The Doppler angle is estimated by combination of Doppler shift and Doppler bandwidth measurements, and flow velocity is calculated from the Doppler shift and the estimated Doppler angle. In vivo study of lip microvascularization demonstrates that this method is capable of providing both flow speed and flow direction information.

         Related Documents

           Related Groups

             Related Science News

               More on Sciencestage

               Answers

               News
          • Local NWS Doppler Radar To Receive Upgrade
            The National Weather Service's Doppler radar in San Diego County is getting an upgrade for the first time in seven decades.
          • Doppler radar gives ‘near-perfect forecast’ of rains
            Weathermen and Bicol’s disaster officials are anticipating the activation of the state-of-the-art Doppler radar in Catanduanes after forecasters here successfully tested its capability to provide a “near-perfect forecast.â€
          • Rain Showers Dwindle By Afternoon Hours
            Doppler 10 meteorologist Josh Poland says to expect a pleasant change to the forecast. Find out when it will come.
          • Doppler radar provides early weather warning
            The huge golf-ball like structure sits right off of Interstate 15 in Cascade County, near the Great Falls International Airport, and it plays a critical role in helping Montanans know what kind of weather to expect: it's the National Weather Service's Doppler radar.
          • Doppler radar getting an update
            The National Weather Service is upgrading its Doppler radar network to better forecast and identify dangerous storms, including tornadoes.
          • More Clouds Than Sun Expected Today
            Doppler 10 meteorologist Josh Poland says that we will see a few breaks of sunshine as the region waits for the next storm system. Get details.
          • Comments ( to add a comment go here )
            The National Weather Service is improving its Doppler radar serving Northeast Florida and Southeast Georgia by installing the latest dual polarization technology.
          • Forecast: More Snow Coming Tonight
            Doppler 10 meteorologist Mike Davis says that snow is back in the forecast. Get your winter weather forecast.
          • How Doppler radars work
            Doppler radars are capable of detecting not only rain movement but the intensity of precipitation. They can detect the presence and location of rainfall and other kinds of precipitation by bouncing radio waves off it and calculating the time it takes for that signal to return.
          • PAGASA to install Doppler radar station in Iloilo City
            ILOILO CITY — The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) is now preparing to install its weather monitoring facilities here following its closure a year ago, this time using the modern Doppler Radar Station instead of the original plan of just a synoptic station.

               Related on Wikipedia




























           

          Powered free by PHPmotion