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Which of the following may cause nonlinear, shift-variant behavior?

10. Which of the following may cause nonlinear, shift-variant behavior?. Data-dependent weighting W Non-quadratic regularizers R Nonnegativity constraints Incomplete algorithm convergence All of the above. The LIR of a statistical reconstruction methods depends on:. Point location

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Which of the following may cause nonlinear, shift-variant behavior?

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  1. 10 Which of the followingmay cause nonlinear, shift-variant behavior? • Data-dependent weighting W • Non-quadratic regularizers R • Nonnegativity constraints • Incomplete algorithm convergence • All of the above

  2. The LIR of a statistical reconstruction methods depends on: Point location Point amplitude Surrounding object Data Statistics All of the above 10

  3. How does FWHM of LIR for PWLS method compare at center of 4 disks? same higher attenuation disks have bigger FWHM lower attenuation disks have smaller FWHM no relationship between attenuation and LIR none of the above 10

  4. For PWLS reconstruction,compared to the noise variance in the heart region,the noise variance in the lung region is: Much lower Somewhat lower Comparable Higher None of the above 10

  5. How much does (quadratic) regularization improve SNR of CHO for SKE detection task? A lot, if we select proper beta At best only a little Makes no difference Quadratic regularization degrades SNR (due to blur) 10

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