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Non-invasive monitoring of intracranial dynamic effects and brain density fluctuations

  • US 20050033171A1
  • Filed: 07/26/2004
  • Published: 02/10/2005
  • Est. Priority Date: 07/24/2003
  • Status: Active Grant
First Claim
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1. A method for non-invasive monitoring density variations of a medium substantially confined within at least a solid boundary comprising:

  • a) providing at least two ultrasonic pulses having different frequencies into the medium for transmission therethrough;

    b) sensing the at least two ultrasonic pulses after traveling through the medium and providing a receive signal in dependence thereupon;

    c) processing the receive signal for determining at least two phase differences between the phases of the at least two sensed ultrasonic pulses and the phases of the at least two provided ultrasonic pulses;

    d) determining data indicative of a density variation of the medium based on the at least two phase differences.

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