A transmission measurement-based spectrum estimation method incorporating X-ray tube voltage fluctuation

ABSTRACT:

Background

The energy spectrum is the property of the X-ray tube that describes the energy fluence per unit interval of photon energy. The existing indirect methods for estimating the spectrum ignore the influence caused by the voltage fluctuation of the X-ray tube.

Methods

In this work, we propose a method for estimating the X-ray energy spectrum more accurately by including the voltage fluctuation of the X-ray tube. It expresses the spectrum as the weighted summation of a set of model spectra within a certain voltage fluctuation range. The difference between the raw projection and the estimated projection is considered as the objective function for obtaining the corresponding weight of each model spectrum. The equilibrium optimizer (EO) algorithm is used to find the wei

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PROVIDER: S-EPMC10239992 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature