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Enabling High Grayscale Resolution Displays and Accurate Response Time Measurements on Conventional Computers
06:50

Enabling High Grayscale Resolution Displays and Accurate Response Time Measurements on Conventional Computers

Published on: February 29, 2012

Optimal SPECT processing and display: making bad studies look good to get the right answer

Dalia Y Ibrahim1, Frank P DiFilippo, Jeremy E Steed

  • 1Department of Nuclear Medicine, Cleveland Clinic, Cleveland, Ohio 44195, USA.

Journal of Nuclear Cardiology : Official Publication of the American Society of Nuclear Cardiology
|December 19, 2006
PubMed
Summary

No abstract available in PubMed .

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Aliasing01:18

Aliasing

Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...