FOCUSED TRANSCRANIAL ULTRASOUND SYSTEMS AND METHODS FOR USING THEM

  • US 20160038770A1
  • Filed: 04/25/2014
  • Published: 02/11/2016
  • Est. Priority Date: 04/26/2013
  • Status: Abandoned Application
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First Claim
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1. A compound acoustic lens apparatus having a short focal length for use with a transcranial ultrasound system, the apparatus comprising:

  • an ultrasound transducer having a diameter;

    a concave lens coupled to the ultrasound transducer, wherein the concave lens has an acoustic velocity that is greater than an acoustic velocity of water; and

    a convex lens coupled to the concave lens, wherein the convex lens has an acoustic velocity that is less than the acoustic velocity of water;

    further wherein the focal length of the compound acoustic lens is 1.5 times the diameter of the ultrasound transducer or less when a frequency of acoustic energy applied from the compound acoustic lens is between about 0.2 MHz and 1 MHz at a spatial-peak, temporal-average intensity of about 10 watts/cm2 or less.

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