4 citations · 7 across the 4 of their papers we have counts for
4 papers
Conditions for the invertibility of dual energy data
Robert Alvarez
The Alvarez-Macovski method [Alvarez, R. E and Macovski, A., "Energy-selective reconstructions in X-ray computerized tomography", Phys. Med. Biol. (1976), 733--44] requires the inv…
K-edge subtraction vs. A-space processing for x-ray imaging of contrast agents: SNR
Robert Alvarez
Purpose: To compare two methods that use x-ray spectral information to image externally administered contrast agents: K-edge subtraction and basis-function decomposition (the A-spa…
Non-Invertibility of spectral x-ray photon counting data with pileup
Robert Alvarez
-In the Alvarez-Macovski method [R.E. Alvarez and A. Macovski, Phys. Med. Biol., 1976, 733-744], the attenuation coefficient is approximated as a linear combination of functions of…
Near optimal neural network estimator for spectral x-ray photon counting data with pileup
Robert Alvarez
-Purpose: A neural network estimator to process x-ray spectral measurements from photon counting detectors with pileup. The estimator is used with an expansion of the attenuation c…