Ultrasound catheter calibration system
First Claim
Patent Images
1. A method for calibration, comprising:
- placing a probe that includes a distal tip, a position sensor and an ultrasonic transducer in a test fixture that includes an ultrasonic target disposed therein at a known position;
manipulating the probe in the test fixture while operating the ultrasonic transducer until an output signal of the transducer indicates that the transducer is in alignment with the ultrasonic target;
measuring a position signal generated by the position sensor while the transducer is in alignment with the ultrasonic target, so as to determine an orientation of the probe in a frame of reference of the test fixture;
measuring a displacement of the ultrasonic transducer relative to the distal tip and;
determining calibration data for the probe responsive to the orientation of the probe and determining the measure of displacement.
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Abstract
Apparatus is provided for calibrating a probe having a position sensor and an ultrasonic transducer. The apparatus includes a test fixture, which includes an ultrasonic target disposed therein at a known position. A computer is adapted to receive a position signal generated by the position sensor while the transducer is in alignment with the ultrasonic target, determine an orientation of the probe in a frame of reference of the test fixture, and determine calibration data for the probe responsive to the orientation of the probe.
140 Citations
51 Claims
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1. A method for calibration, comprising:
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placing a probe that includes a distal tip, a position sensor and an ultrasonic transducer in a test fixture that includes an ultrasonic target disposed therein at a known position; manipulating the probe in the test fixture while operating the ultrasonic transducer until an output signal of the transducer indicates that the transducer is in alignment with the ultrasonic target; measuring a position signal generated by the position sensor while the transducer is in alignment with the ultrasonic target, so as to determine an orientation of the probe in a frame of reference of the test fixture;
measuring a displacement of the ultrasonic transducer relative to the distal tip and;determining calibration data for the probe responsive to the orientation of the probe and determining the measure of displacement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for calibration, comprising:
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placing a probe that includes a distal tip, a position sensor and an imaging device in a test fixture, which comprises an imaging target disposed therein at a known position; manipulating the probe in the test fixture while operating the imaging device until an output signal of the imaging device indicates that the imaging device is in alignment with the imaging target; measuring a position signal generated by the position sensor while the imaging device is in alignment with the imaging target, so as to determine an orientation of the probe in a frame of reference of the test fixture; measuring a displacement of the imaging device relative to the distal tip; determining calibration data for the probe responsive to the orientation of the probe and determining the measure of displacement.
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27. Apparatus for calibrating a probe having a distal tip, a position sensor and an ultrasonic transducer, the apparatus comprising:
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a test fixture, which comprises an ultrasonic target disposed therein at a known position; and a computer, adapted to; receive a position signal generated by the position sensor while the transducer is in alignment with the ultrasonic target, determine an orientation of the probe in a frame of reference of the test fixture, measuring a displacement of the ultrasonic transducer relative to the distal tip; determine calibration data for the probe responsive to the orientation of the probe; and determine the measure of displacement. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. Apparatus for calibrating a probe having a distal tip, a position sensor and an imaging device, the apparatus comprising:
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a test fixture, which comprises an imaging target disposed therein at a known position; and a computer, adapted to; receive a position signal generated by the position sensor while the imaging device is in alignment with the imaging target, determine an orientation of the probe in a frame of reference of the test fixture, determine a displacement of the imaging device relative to the distal tip; determine calibration data for the probe responsive to the orientation of the probe; and determine the measurement of displacement.
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Specification