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build your own treatment instrument

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  • spare_qi
    http://groups.yahoo.com/group/beyond_rife_therapy/
    Message 1 of 3 , May 20, 2003
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    • hrebesh ms
      Optical Topography-Principles of Near Infrared Spectroscopy (NIRS) Weak near infrared light of about 1.5mW from a laser diode is illuminated onto head from
      Message 2 of 3 , Jun 5, 2003
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        Optical Topography-Principles of Near Infrared Spectroscopy (NIRS)
         
          
        Weak near infrared light of about 1.5mW from a laser diode is illuminated onto head from optical fibers attached to the scalp. This light passes through the skull and reaches the cerebral cortex. It penetrates to a depth of about 3cm and is scattered by hemoglobin in the blood. The light is partially reflected back through the scalp. The reflected light is detected 3cm from the original illuminated point. In adults, the light attenuates to a level as low as a hundred millionth or even a billionth of the irradiated light. The reflected light is sent through optical fibers and received with a highly sensitive avalanche photodiode detector.

        The figure on the left is the molecular absorption coefficient of oxy- and deoxy-hemoglobin. Brain activity is characterized by the firing of neurons. This results in active energy metabolism and causes secondary increase in blood volume to supply glucose and oxygen to the tissues. Thus, the change in concentration of hemoglobin is an important index for the brain activity.

        The reflected light is measured every 0.1 seconds, and the latter measured data is subtracted from the former to determine the concentration change of hemoglobin. The intensity of the reflected light depends on the respective concentration of the two kinds of hemoglobin. Two kinds of laser diodes (780nm and 830nm) are used to separate the two kinds of hemoglobin concentration changes independently.



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      • Darwin
        Sounds interesting, but were you trying to send (attached) PIX/ schematic, etc...? The email msg was only 8kb and contained 2 empty PHOTO shells, but no PIX-
        Message 3 of 3 , Jun 5, 2003
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          Sounds interesting, but were you trying to send (attached) PIX/ schematic, etc...?

          The email msg was only 8kb and contained 2 empty PHOTO shells, but no PIX-
          so could you try sending them again, or elaborate further on what we are missing?

          Darwin

          PS: I thought this group had moved, I just happened to still be on [email]
          delivery.
          --------------------------------------------------------------------------------

          hrebesh ms wrote:

          >
          >
          Optical Topography-Principles of
          Near Infrared Spectroscopy (NIRS)




          Weak near infrared light of about
          1.5mW from a laser diode is
          illuminated onto head from optical
          fibers attached to the scalp. This
          light passes through the skull and
          reaches the cerebral cortex. It
          penetrates to a depth of about 3cm
          and is scattered by hemoglobin in
          the blood. The light is partially
          [Image]reflected back through the scalp.
          The reflected light is detected 3cm
          from the original illuminated point.
          In adults, the light attenuates to a
          level as low as a hundred millionth
          or even a billionth of the
          irradiated light. The reflected
          light is sent through optical fibers
          and received with a highly sensitive
          avalanche photodiode detector.
          [Image]The figure on the left is the
          molecular absorption coefficient of
          oxy- and deoxy-hemoglobin. Brain
          activity is characterized by the
          firing of neurons. This results in
          active energy metabolism and causes
          secondary increase in blood volume
          to supply glucose and oxygen to the
          tissues. Thus, the change in
          concentration of hemoglobin is an
          important index for the brain
          activity.

          The reflected light is measured
          every 0.1 seconds, and the latter
          measured data is subtracted from the
          former to determine the
          concentration change of hemoglobin.
          The intensity of the reflected light
          depends on the respective
          concentration of the two kinds of
          hemoglobin. Two kinds of laser
          diodes (780nm and 830nm) are used to
          separate the two kinds of hemoglobin
          concentration changes independently.
          >
          >
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