Method for tuning lithotripsy frequency to target size
AssigneeUniversity of Washington
InventorsMichael R. Bailey, Adam D. Maxwell, Oleg A. Sapozhnikov
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Abstract
Methods and systems for tuning lithotripsy frequency to target size are disclosed. In one embodiment, a lithotripsy system for comminuting a stone in a body includes: a burst wave lithotripsy (BWL) therapy transducer configured to transmit smooth ultrasound waves within a burst of ultrasound waves toward the stone; and a controller configured to determine operating frequency of the ultrasound waves of the therapy transducer. The operating frequency of the ultrasound waves is determined as: f = Const . c d where: d is a diameter of the stone, f is the frequency of the ultrasound waves, c is a wave speed in the stone, and Const. is a predetermined constant.
Claims21
A lithotripsy system for comminuting a stone in a body, comprising:
- a burst wave lithotripsy (BWL) therapy transducer configured to transmit smooth ultrasound waves within a burst of ultrasound waves toward the stone;
- and
- a controller configured to determine an operating frequency of the ultrasound waves of the therapy transducer;
- wherein the operating frequency of the ultrasound waves is determined as:
- f
- =
- Const
- .
- c
- d
- where:
- d is a diameter of the stone,
- f is the frequency of the ultrasound waves,
- c is a wave speed in the stone, and
- Const. is a predetermined constant.
A method for comminuting a stone in a body using an ultrasound, comprising:
- determining an operating frequency of smooth ultrasound waves of a burst wave lithotripsy (BWL) therapy transducer, wherein the therapy transducer is configured to transmit the ultrasound waves within bursts of ultrasound waves at the operating frequency toward the stone;
- wherein the operating frequency is determined as:
- f
- =
- Const
- .
- c
- d
- where:
- d is a diameter of the stone,
- f is the frequency of the ultrasound waves,
- c is a wave speed in the stone, and
- Const. is a predetermined constant;
- and
- transmitting the ultrasound waves at the operating frequency toward the stone.
Dependencies are inferred from the claim text.