Abstract #0043

Fast Fourier transform-based susceptibility-to-B0 calculation without aliasing artifacts

Lee Seungkyun^1,2

¹Center for Neuroscience Imaging Research (CNIR), Institute for Basic Science (IBS), Suwon, Korea, Republic of, ²Department of Biomedical Engineering, Sungkyunkwan University (SKKU), Suwon, Korea, Republic of

In the Fourier transform-based susceptibility-to-B₀ calculation, the dipolar field kernel (1/3-k_z²/k²) is discretely sampled in the k-space, which leads to aliasing artifacts in the spatial domain. We show that calculating and discretizing the dipolar field kernel in the spatial domain, before the Fourier transform, can effectively reduce the aliasing effect without resorting to large zero-filled buffers. In particular, aliasing is eliminated if the spatial-domain grid size is larger than the combined dimensions of the susceptibility source and the B₀ target regions. The new method can accelerate repeated calculations of susceptibility-induced B₀ fields.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.