The aim of this research is to study the influence of NSA shift to SNR and to obtain the NSA value which has more optimum image with high SNR. Each change of NSA obtained three images, taken on the tissue of signal of corpus, discus, spinal cord, and spinal myelo and a standart deviation of noise with the method Region of Interest (ROI) in order to obtain a signal that calculates its SNR. Exper…