Ultrasonic method and apparatus for measuring intracranial contents volume change
First Claim
Patent Images
1. A device for measuring intracranial contents'"'"' volume change of a patient'"'"'s head comprising:
- a first gel pad and a second gel pad adapted to be positioned on either side of the patient'"'"'s head respectively; and
a first ultrasonic transducer and a second ultrasonic transducer positioned adjacent to said first and second gel pads respectively;
said first and second ultrasonic transducers each comprising;
a piezoceramic disc; and
a piezoceramic ring encircling said piezoceramic disc.
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Abstract
An ultrasonic method for indicating a characteristic of intracranial components'"'"' volume changes includes the transmission of broadband ultrasound from a transmitting transducer positioned on one side of a human head to a receiving transducer located on another side of the human head with decomposition of the received signal into narrowband components and determination therefrom of group delay, phase angle and attenuation as a basis for derivation of the characteristic of the intracranial media.
30 Citations
33 Claims
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1. A device for measuring intracranial contents'"'"' volume change of a patient'"'"'s head comprising:
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a first gel pad and a second gel pad adapted to be positioned on either side of the patient'"'"'s head respectively; and a first ultrasonic transducer and a second ultrasonic transducer positioned adjacent to said first and second gel pads respectively; said first and second ultrasonic transducers each comprising; a piezoceramic disc; and a piezoceramic ring encircling said piezoceramic disc. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A device for measuring intracranial contents'"'"' volume change of a patient'"'"'s head comprising:
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a first gel pad adapted to be positioned on a first side of the patient'"'"'s head; a second gel pad adapted to be positioned on a second side of the patient'"'"'s head; a first ultrasonic transducer positioned adjacent to said first gel pad, said first ultrasonic transducer including; a first piezoceramic disc; and a first piezoceramic ring encircling said first piezoceramic disc; a second ultrasonic transducer positioned adjacent to said second gel pad, said second ultrasonic transducer including; a second piezoceramic disc; and a second piezoceramic ring encircling said second piezoceramic disc; a first scanner positioned adjacent to said first ultrasonic transducer; a second scanner positioned adjacent to said second ultrasonic transducer; a time division multiplexer coupled to said first and second ultrasonic transducers; a computer coupled to said time division multiplexer; and a display coupled to said computer. - View Dependent Claims (18, 19, 20)
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21. A method for measuring intracranial contents'"'"' volume change of a patient'"'"'s head comprising the steps of:
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positioning a first gel pad on a first side of the patient'"'"'s head; positioning a second gel pad on a second side of the patient'"'"'s head; positioning a first ultrasonic transducer adjacent to the first gel pad, the first ultrasonic transducer having a first piezoceramic disc and a first piezoceramic ring encircling the first piezoceramic disc; positioning a second ultrasonic transducer adjacent to the second gel pad, the second ultrasonic transducer having a second piezoceramic disc and a second piezoceramic ring encircling the second piezoceramic disc; generating first and second ultrasonic pulses with the first and second ultrasonic transducers respectively; transmitting the first ultrasonic pulse through the patient'"'"'s head at a first signal transmission direction; transmitting the second ultrasonic pulse through the patient'"'"'s head at a second signal transmission direction; receiving a first ultrasonic echo pulse with the first ultrasonic transducer at a first echo signal receiving direction; and receiving a second ultrasonic echo pulse with the second ultrasonic transducer at a second echo signal receiving direction. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for measuring intracranial contents'"'"' volume change of a patient'"'"'s head comprising the steps of:
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positioning a first ultrasonic transducer on a first side of the patient'"'"'s head; positioning a second ultrasonic transducer on a second side of the patient'"'"'s head, on a substantially opposite side of the patient'"'"'s head from the first ultrasonic transducer; said first and second ultrasonic transducers each comprising; a piezoceramic disc; and a piezoceramic ring encircling said piezoceramic disc; positioning a first scanner adjacent to the first ultrasonic transducer; positioning a second scanner adjacent to the second ultrasonic transducer; generating a first ultrasonic pulse with the first ultrasonic transducer; transmitting the first ultrasonic pulse through a patient'"'"'s head at a first signal transmission direction; generating a second ultrasonic pulse with the second ultrasonic transducer; transmitting the second ultrasonic pulse through a patient'"'"'s head at a second signal transmission direction; generating a first electrical pulse corresponding to the transmitted first ultrasonic pulse; measuring a first echo pulse at a first echo signal receiving direction corresponding to an echo signal of the transmitted first ultrasonic pulse; generating a first echo electrical pulse corresponding to the measured first echo pulse; generating a second electrical pulse corresponding to the transmitted second ultrasonic pulse; measuring a second echo pulse at a second echo signal receiving direction corresponding to an echo signal of the transmitted second ultrasonic pulse; generating a second echo electrical pulse corresponding to the measured second echo pulse; scanning the first signal transmission direction and first echo signal receiving direction with the first ultrasonic scanner to identify the optimal first signal transmission direction and optimal first echo signal receiving direction; and scanning the second signal transmission direction and second echo signal receiving direction with the second ultrasonic scanner to identify the optimal second signal transmission direction and optimal second echo signal receiving direction. - View Dependent Claims (32, 33)
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Specification