Meeting Banner
Abstract #3632

Development of a realistic MRI phantom to mimic static and dynamic B0 field inhomogeneities in the human cervical spinal cord

Laura Beghini1, Brunnhilde M. A-S. Ponsi1, Kamilla Refsholt1, Annelen Dogger Schmidt1, Sebastian A.D. Sandbu1, and S. Johanna Vannesjo1
1Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim, Norway

Synopsis

Keywords: Phantoms, Phantoms

Motivation: Spinal cord imaging is affected by static and dynamic B0 field inhomogeneities, which reduce image quality. Homogeneous phantoms fail to reproduce these effects.

Goal(s): Build an anthropomorphic phantom of the cervical spine to mimic the field inhomogeneities encountered in vivo. Such a phantom can aid developing advanced acquisition and correction techniques.

Approach: We 3D-printed segmented vertebrae and placed them inside a head/neck phantom shell to reproduce the static inhomogeneities. Dynamic inhomogeneities were generated by periodically moving metal staples along the phantom surface.

Results: Static inhomogeneities were replicated with approximatively one third of the intensity encountered in vivo. The dynamic fluctuations were accurately replicated.

Impact: Static and dynamic B0 field inhomogeneities are among the main challenges in spinal cord imaging, causing signal loss, distortion and ghosting. An anthropomorphic phantom reproducing the fields could aid development of advanced acquisition and correction techniques to mitigate these artifacts.

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.

Keywords