Technical Note: On the accuracy of parametric two-parameter photon cross-section models in dual-energy CT applications.

ABSTRACT:

Purpose

To evaluate and compare the theoretically achievable accuracy of two families of two-parameter photon cross-section models: basis vector model (BVM) and modified parametric fit model (mPFM).

Method

The modified PFM assumes that photoelectric absorption and scattering cross-sections can be accurately represented by power functions in effective atomic number and/or energy plus the Klein-Nishina cross-section, along with empirical corrections that enforce exact prediction of elemental cross-sections. Two mPFM variants were investigated: the widely used Torikoshi model (tPFM) and a more complex "VCU" variant (vPFM). For 43 standard soft and bony tissues and phantom materials, all consisting of elements with atomic number less than 20 (except iodine), we evaluated the the

SUBMITTER: Han D 

PROVIDER: S-EPMC5473361 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature