Updating of form factor tabulations for coherent scattering of photons in tissues

Abstract

An updating of photon transport modelling in tissues is carried out by including the effect of molecular interference in the coherent (Rayleigh) scattering. To this end, the present tabulations--which permit us to obtain the linear differential scattering coefficient of compounds from a simple weighted sum of the elemental components--are integrated by adding files for a limited set of molecular interference functions. This set originates from a four-component model which is found to be capable of reproducing human tissues in situations involving bony and soft tissues. The proposed procedure overcomes, in the computation, the hindrance that the dependence on molecular interference effects leads every tissue to have its own diffraction pattern, which is not easily obtained by means of measurements or calculations.

Rayleigh scatter in kilovoltage x-ray imaging: is the independent atom approximation good enough?

“…Figure 4 (a) to (h) show Table 1. Tissue composition in terms of the basis set of Tartari et al (2002).…”

“…This program has the advantage that it 70 is optimized for simulating imaging and hence fast; it is also trivial to modify the Rayleigh scattering data. Tartari et al (2002) have provided experimental Interference Functions (IFs) for several biological materials: water, fat, bone matrix and bone mineral. Those authors have suggested that these four materials can be used as a basis set for constructing a realistic model of a human patient.…”

Koherent saçılma üzerine moleküler girişimin etkisi

“…Morin [9] have tabulated molecular form factor for liquid water. Tartari et al [2] developed molecular form factor tabulations for coherent scattering of photons in tissues. Peplow and Verghese [10] extracted molecular form factors from experimental measurements.…”

Analytical evaluation of atomic form factors: Application to Rayleigh scattering

“…Form factors (FFs) of specimens of various types, from nuclear compounds to biological tissues, have been widely investigated in the past and also recently in different branches of science, since they provide detailed information concerning the electric charge distribution of the specimens [1][2][3][4][5][6]. By systematically measuring FFs, information about the electric charge distribution of targets has been extensively extracted from scattering experiments [7,8].…”