Diffuse focus ultrasound hyperthermia system

Claim 2

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; a further plurality of lens elements, coupled to the plurality of transducer elements, to transmit the multiple sources of ultrasonic energy to the subject as a diffuse-focus beam having a selected dimension in a direction substantially perpendicular to a direction of propagation; and focusing means for dynamically varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy, said variations in focal regions including variations in the selected dimension of the diffuse-focus beam.

Claim 3

The system of claim 1 wherein the transducer elements are arranged in a circular array.

Claim 4

The system of claim 2 wherein the transducer elements are pie-shaped elements.

Claim 5

The system of claim 3 wherein the plurality of lens elements includes pie-shaped lens elements adopted to be disposed between the transducer elements and the subject.

Claim 6

The system of claim 1 wherein the focusing means further includes tilting means for tilting the individual lens elements to change their focal regions.

Claim 7

The system of claim 5 wherein the tilting means includes means for tilting the individual lens elements to change the focal depth of the individual lens elements.

Claim 8

The system of claim 1, further including rotating means, supportingly connected to the array of transducer elements, for rotating the array of transducer elements through a selected orbital path.

Claim 9

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; a further plurality of lens elements, coupled to the plurality of transducer elements, to transmit the multiple sources of ultrasonic energy to the subject; and focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy, the focusing means including tilting means for tilting the individual lens elements to change their focal regions, the tilting means including (i) means for tilting the individual lens elements to change the focal depth of the individual lens elements, and (ii) means for introducing a substantially randomized perturbation in the tilt of the individual lens elements.

Claim 10

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; a further plurality of lens elements, coupled to the plurality of transducer elements, to transmit the multiple sources of ultrasonic energy to the subject; and focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy, the focusing means including tilting means for tilting the individual lens elements to change their focal regions, the tilting means including (i) means for tilting the individual lens elements to change the focal depth of the individual lens elements, and (ii) means for introducing a substantially randomized perturbation in the tilt of the individual lens elements.

Claim 11

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; a further plurality of lens elements to transmit the multiple sources of ultrasonic energy to the subject; and focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy, the focusing means including wedge focusing means for selectively positioning a wedge of ultrasound transmitting medium between an individual lens element and a corresponding transducer element.

Claim 12

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; a further plurality of lens elements to transmit the multiple sources of ultrasonic energy to the subject; and focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy, the focusing means including wedge focusing means for selectively positioning a wedge of ultrasound transmitting medium between an individual lens element and a corresponding transducer element.

Claim 13

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of ultrasonic energy generating modules, each module including (i) a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; (ii) variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; (iii) a further plurality of lens elements, coupled to the plurality of transducer elements, to transmit the multiple sources of ultrasonic energy to the subject; and (iv) focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy.

Claim 14

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of ultrasonic energy generating modules, each module including (i) a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; (ii) variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; (iii) a further plurality of lens elements, coupled to the plurality of transducer elements, to transmit the multiple sources of ultrasonic energy to the subject; and (iv) focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy.

Claim 15

The system of claim 10, further including scanning means, supportingly connected to said ultrasonic energy generating modules, for scanning said ultrasound generating modules across a selected area.

Claim 16

The system of claim 10, further including amplitude shading means for selectively varying, in accordance with a selected geometric pattern, the amplitude of ultrasonic energy generated by individual transducer elements.

Claim 17

The system of claim 10, further including rotating means, supportingly connected to said ultrasonic energy generating modules, for rotating the ultrasonic energy generating modules through a selected orbital path.

Claim 18

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; a further plurality of lens elements to transmit the multiple sources of ultrasonic energy to the subject; focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy; rotating means, supportingly connected to the array of transducer elements, for rotating the array of transducer elements through a selected orbital path; and amplitude shading means, responsive to the instantaneous angular position of the array of transducer elements, for selectively varying the amplitude of ultrasonic energy generated by individual transducer elements.

Claim 19

An ultrasonic hyperthermia system for delivering hyperthermic therapy to a subject, the system comprising: a plurality of piezoelectric transducer elements arranged in a two-dimensional array to provide multiple sources of ultrasonic energy; variable activation means for activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; a further plurality of lens elements to transmit the multiple sources of ultrasonic energy to the subject; focusing means for varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy; rotating means, supportingly connected to the array of transducer elements, for rotating the array of transducer elements through a selected orbital path; and amplitude shading means, responsive to the instantaneous angular position of the array of transducer elements, for selectively varying the amplitude of ultrasonic energy generated by individual transducer elements.

Claim 22

The method of claim 15 wherein the step of arranging the plurality of piezoelectric transducer elements includes the step of arranging the transducer elements in a circular array.

Claim 23

The method of claim 15 further comprising the step of configuring the transducer elements as pie-shaped transducer elements.

Claim 24

The method of claim 17, further comprising the step of configuring the lens elements as pie-shaped lens elements disposed between the transducer elements and the subject.

Claim 25

The method of claim 15 wherein the step of varying the position of the lens elements includes the step of tilting the individual lens elements to change their focal regions.

Claim 26

The method of claim 19 wherein the step of varying the position of the lens elements includes the step of tilting the individual lens elements to change the focal depth of the individual lens elements.

Claim 27

The method of claim 15, further including the step of rotating the array of transducer elements through a selected orbital path.

Claim 32

An ultrasonic hyperthermia method for delivering hyperthermic therapy to a subject, the method comprising the steps of: arranging a plurality of piezoelectric transducer elements in a plurality of two-dimensional arrays to provide multiple sources of ultrasonic energy; activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; configuring a further plurality of lens elements to transmit the multiple sources of ultrasonic energy to the subject; varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy; and configuring the plurality of arrays as a plurality of ultrasonic energy generating modules.

Claim 33

An ultrasonic hyperthermia method for delivering hyperthermic therapy to a subject, the method comprising the steps of: arranging a plurality of piezoelectric transducer elements in a plurality of two-dimensional arrays to provide multiple sources of ultrasonic energy; activating the transducer elements individually and at variable electrical energy levels to permit the multiple sources of ultrasonic energy to vary in intensity; configuring a further plurality of lens elements to transmit the multiple sources of ultrasonic energy to the subject; varying the position of the lens elements individually to permit variations in the focal regions of the multiple sources of ultrasonic energy; and configuring the plurality of arrays as a plurality of ultrasonic energy generating modules.

Claim 34

The method of claim 24, further including the step of scanning the ultrasound generating modules across a selected area.

Claim 35

The method of claim 24, further including the step of selectively varying, in accordance with a selected geometric pattern, the amplitude of ultrasonic energy generated by individual transducer elements.

Claim 36

The method of claim 24, further including the step of rotating the ultrasonic energy generating modules through a selected orbital path.