Electron density and effective atomic number estimation in a maximum a posteriori framework for dual-energy computed tomography.

CONCLUSION: Theoretical and experimental results suggest that the MAP framework produces more accurate and precise estimates of the electron density and SPR. Thus, the present approach limits the propagation of noise in DECT attenuation data to radiotherapy-related parameters maps such as the SPR and the electron density. Using a MAP framework with DECT for radiotherapy treatment planning can help maximizing the precision of dose calculation. The method also provides more precise estimates of the effective atomic number. The MAP methodology is presented in a general way such that it can be adapted to any DECT image-based tissue characterization method. PMID: 32491193 [PubMed - as supplied by publisher]

https://www.ncbi.nlm.nih.gov/pubmed/32491193?dopt=Abstract

Source: Physics in Medicine and Biology - June 2, 2020 Category: Physics Authors: Simard M, Bär E, Blais D, Bouchard H Tags: Med Phys Source Type: research