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US 12,569,144 B2Granted
Acoustic imaging and measurements using windowed nonlinear frequency modulation chirp
AssigneeDeepSight Technology, Inc.
InventorDanhua Zhao
Life of this patent
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Abstract
A method for performing acoustic imaging and measurements may include generating a nonlinear frequency modulation (NLFM) chirp waveform based on a frequency response of at least one transducer. The method may further include generating an apodized signal by applying a window function to the NLFM chirp waveform. The method may further include exciting the at least one transducer with the apodized signal. The method may further include compressing received signals by using one or more matched filters.
Claims30
A method for performing acoustic measurements comprising:
- generating a nonlinear frequency modulation (NLFM) chirp waveform based on a frequency response of at least one transducer;
- generating an apodized signal by applying a window function to the NLFM chirp waveform;
- exciting the at least one transducer with the apodized signal, the at least one transducer transmitting a set of acoustic signals in response to excitation by the apodized signal, wherein at least one optical sensor receives one or more acoustic signals to obtain a set of received acoustic signals and generates a set of measurement signals based on the set of received acoustic signals, the at least one transducer being arranged in a probe, the at least one optical sensor being separate from the at least one transducer and being arranged in an item whose position is to be located and tracked during a medical procedure, the at least one optical sensor and the item being inside a patient body during the medical procedure;
- and
- determining a distance between the at least one optical sensor and the at least one transducer based on the set of measurement signals during the medical procedure.
2 more elements
A system for acoustic measurements comprising:
- at least one transducer arranged in a probe;
- a non-transitory processor-readable medium storing code representing instructions to be executed by a processor of a first computing device, the code comprising code to cause the processor to generate a nonlinear frequency modulation (NLFM) chirp waveform based on a frequency response of the at least one transducer;
- and
- a transmitter configured to:
- generate an apodized signal based on the NLFM chirp waveform and a window function, and
- excite the at least one transducer with the apodized signal;
- the at least one transducer configured to transmits a set of acoustic signals in response to excitation by the apodized signal,
- at least one optical sensor separate from the at least one transducer and arranged in an item whose position is to be located and tracked during a medical procedure, the at least one optical sensor and the item being inside a patient body during the medical procedure, the at least one optical sensor configured to:
- receive one or more acoustic signals to obtain a set of received acoustic signals;
- and
- generate a set of measurement signals based on the set of received acoustic signals;
- and
- the non-transitory processor-readable medium further comprising code to cause the processor to determine a distance between the at least one optical sensor and the at least one transducer based on the set of measurement signals during the medical procedure.
10 more elements
Dependencies are inferred from the claim text.