Optimization of the geometry and speed of a moving blocker system for cone-beam computed tomography scatter correction.

ABSTRACT:

Purpose

X-ray scatter is a significant barrier to image quality improvements in cone-beam computed tomography (CBCT). A moving blocker-based strategy was previously proposed to simultaneously estimate scatter and reconstruct the complete volume within the field of view (FOV) from a single CBCT scan. A blocker consisting of lead stripes is inserted between the X-ray source and the imaging object, and moves back and forth along the rotation axis during gantry rotation. While promising results were obtained in our previous studies, the geometric design and moving speed of the blocker were set empirically. The goal of this work is to optimize the geometry and speed of the moving block system.

Methods

Performance of the blocker was examined through Monte Carlo (MC) simulation and

SUBMITTER: Chen X 

PROVIDER: S-EPMC5619659 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature