Objective: Study on the relationship of Propeller technology and image quality such as signal -to - noise ratio (SNR), contrast - to - noise ratio (CNR) and artifact .

Part one:the feature of signal intensity and apparent diffusion coefficient of different b value in normal uterus and the choice of the best b valueObjective To observe the feature of signal intensity and apparent diffusion coefficient of different b value in normal uterus,To investigate the imaging quality、SNR and CNR,then choose the best b value suitting the DWI of normal uterus.

SNR analysis in MRI quality control;

The Monte Carlo simulation of SNR for thin NaI(Tl) detector;

NOVEL DESIGN OF FEEDFORWARD ANC SYSTEM WITH SNR PROCESS GAIN;

The estimation of signal-to-noise ratio and its use in high-resolution processing;

Study on signal-to-noise ratio of drug-fluorescence imaging system;

Clock jitter measurement technique based on signal-to-noise ratio;

The processing techniques of low signal-noise ratio seismic data of plain marine strata;

A method for processing the converted-wave data whose signal-noise ratio is low;

By establishing the random signal model and introducing the noise and signal in the form of their product,signal-noise ratio has been raised apparently and total signal power has been promoted greatly.