Abstract
Background gradients induced by magnetic susceptibility variations near air-filled cavities in the brain cause signal-intensity loss in gradient-echo images and shorten T2* considerably. With a correction method in which the exponential decay is restored with section-profile-dependent correction factors, parts of the signal intensity can be recovered. While uncorrected T2* values drop by 20% at a gradient strength of 75 μT/m, with correction and exponential excitation pulses, this boundary is pushed to 220 μT/m.
Highlights
Accurate T2* measurement is important for a variety of applications
In Fig 1, T2* values are plotted against the corresponding susceptibility gradient strengths for a cuboid volume of interest in the phantom where the background gradient exhibits strong variation over several sections
Uncorrected T2* values drop by 20% at a gradient strength of 75 T/m for sinc-shaped pulses, 63 T/m for sinc-Gauss–shaped pulses, and 34 T/m for exponential pulses
Summary
The aim of the current study was to compare 3 different pulse
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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 callDisclaimer: 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.
