Abstract

To compare the image quality characteristics of a cone-beam CT (CBCT) imaging system with noncircular scan protocols (Sine-on-Sphere) to a conventional circular orbit. A phantom was used to assess image uniformity, image noise, and noise-power spectrum (NPS) for a biplane C-arm (Icono; Siemens Healthineers) that could perform CBCT with either a circular or non-circular orbit (Sine-on-Sphere, “SineSpin”). The non-circular orbit used a sinusoidal motion with an amplitude of ±10º during the orbit. Uniformity and quantum noise were similar for the circular and non-circular orbits. A slight increase in cupping artifact for the noncircular orbit was observed and attributed to slightly increased path lengths (increased scatter-to-primary ratio) for oblique rays through the cylindrical phantom. The NPS clearly depicted closing of the “null cone” about the fz spatial frequency axis owing to improved sampling with the non-circular orbit. A non-circular orbit for CBCT resulted in improved sampling with similar noise magnitude and uniformity compared to a circular orbit.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.