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Quantitative Accuracy of Penalized-Likelihood Reconstruction for ROI Activity Estimation.

Qi, J Fu, L Stickel, Jr Ramsey D. Badawi

Published in IEEE Transactions on Nuclear Science

Estimation of the tracer uptake in a region of interest (ROI) is an important task in emission tomography. ROI quantification is essential for measuring clinical factors such as tumor activity, growth rate, and the efficacy of therapeutic interventions. Accuracy of ROI quantification is significantly affected by image reconstruction algorithms. In ...

Spatial distortion correction and crystal identification for MRI-compatible position-sensitive avalanche photodiode-base...

Abhijit Chaudhari Joshi, Aa Wu, Y Leahy, Rm Cherry, Sr Ramsey D. Badawi

Published in IEEE Transactions on Nuclear Science

Position-sensitive avalanche photodiodes (PSAPDs) are gaining widespread acceptance in modern PET scanner designs, and owing to their relative insensitivity to magnetic fields, especially in those that are MRI-compatible. Flood histograms in PET scanners are used to determine the crystal of annihilation photon interaction and hence, for detector ch...

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