title: Cone Beam CT vs. Fan Beam CT: A Comparison of Image Quality and Dose Delivered Between Two Differing CT Imaging Modalities.
abstract: A comparison of image quality and dose delivered between two differing computed tomography (CT) imaging modalities-fan beam and cone beam-was performed. A literature review of quantitative analyses for various image quality aspects such as uniformity, signal-to-noise ratio, artifact presence, spatial resolution, modulation transfer function (MTF), and low contrast resolution was generated. With these aspects quantified, cone beam computed tomography (CBCT) shows a superior spatial resolution to that of fan beam, while fan beam shows a greater ability to produce clear and anatomically correct images with better soft tissue differentiation. The results indicate that fan beam CT produces superior images to that of on-board imaging (OBI) cone beam CT systems, while providing a considerably less dose to the patient.
authors.affiliation: California State University Fresno.
authors.forename: Lawrence
authors.initials: L
authors.lastname: Lechuga
authors.affiliation: Radiation Oncology, National Medical Physics and Dosimetry Comp., Inc.
authors.forename: Georg A
authors.initials: GA
authors.lastname: Weidlich
keywords: cbct; dose; fan beam; fbct; image quality; uniformity