Ultrasound transducer with focused ultrasound refraction plate

Details Ultrasound transducer with focused ultrasound refraction plate Ultrasound transducer with focused ultrasound refraction plate

1997-03-17

1999-02-23

Casler, Brian

Surgery: kinesitherapy

Kinesitherapy

Ultrasonic

310334, A61B 1722

Patent

active

058738452

ABSTRACT:
A system for performing surgery by vibrational heating employs an ultrasonic transducer 80 for focusing a spherical ultrasound wave on a focal region. In one embodiment a refraction plate 410 having a spherical surface facing the transducer and a refracting surface with refracting pyramid elements 450 facing the subject causes the ultrasound beam to impinge on a plurality of overlapping focal regions and thereby expand the focal area of the transducer. In a second embodiment the refraction plate comprises a phased lens 600 having a constant thickness at any angular location but with its thickness varying linearly over 2.pi. radians or multiples thereof.

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