The error estimation of the quasi-synchronous sampling harmonics anal-ysis and the method used for measuring the subharmonics of periodic signalsare also discussed.
After analysis and determination on harmonic wave from rectification units operation, and understood hazardness of harmonic wave, the design project of harness was put forward.
In this superradiance harmonics, the temporal width of harmonics is extremely short, the ratio of high harmonic fundamental wave is much higher than the known superradiance harmonics.
Conclusion:NTHI is a new technology in ultrasound diagnosis which can enhance tissue resolution,improving sonograph quality by reducing artifact and cultter,thereby it is useful to increase ultraso...