Noise reduction in nuclear medicine images.
Common methods of reducing random noise in nuclear medicine use lowpass filtering, which has the disadvantage that it affects high-frequency components of the image. We developed a noise-reduction approach that estimates signal and noise levels in each of several frequency bands and removes the appropriate amount of noise with little effect on the signal in each band.
D011856:Radiographic Image Enhancement / Q000379:methods*; D013679:Technology, Radiologic