Evaluation of the high definition field of view option of a large-bore computed tomography scanner for radiation therapy simulation.

ABSTRACT:

Background and purpose

Computed tomography (CT) scanning is the basis for radiation treatment planning, but the 50-cm standard scanning field of view (sFOV) may be too small for imaging larger patients. We evaluated the 65-cm high-definition (HD) FOV of a large-bore CT scanner for CT number accuracy, geometric distortion, image quality degradation, and dosimetric accuracy of photon treatment plans.

Materials and methods

CT number accuracy was tested by placing two 16-cm acrylic phantoms on either side of a 40-cm phantom to simulate a large patient extending beyond the 50-cm-diameter standard scanning FOV. Dosimetric accuracy was tested using anthropomorphic pelvis and thorax phantoms, with additional acrylic body parts on either side of the phantoms. Two volumetric modulated

SUBMITTER: Wu RY 

PROVIDER: S-EPMC7302052 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature