Abstract #3355

Stretched Radial Trajectory Design for Improved K-space Coverage and Effective Image Resolution

Li Song Gong^1,2, Xiaozhi Cao^2,3, Zihan Zhou^2,3, Congyu Liao^2,3, Qing Li⁴, Yang Yang⁵, and Kawin Setsompop^2,3

¹Department of Physics and Astronomy, University of California, Irvine, Irvine, CA, United States, ²Department of Radiology, Stanford University, Stanford, CA, United States, ³Department of Electrical Engineering, Stanford University, Stanford, CA, United States, ⁴MR Research Collaborations, Siemens Healthineers Ltd., Shanghai, China, ⁵Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States

Synopsis

Keywords: New Trajectories & Spatial Encoding Methods, New Trajectories & Spatial Encoding Methods

Motivation: Conventional radial sampling cannot cover full k-space, therefore reducing effective resolution. This study aims to enhance k-space coverage without increasing scan times.

Goal(s): Develop and validate a “stretched radial” sampling trajectory to improve k-space coverage and image resolution while keeping gradient performance and time constraints.

Approach: Design a stretched trajectory scheme, implementing on 2D, 3D, and spiral projection sampling, and compared with conventional methods through phantom and in-vivo MRI experiments.

Results: The proposed method successfully enhanced resolution and image sharpness without increasing acquisition time, effectively improving details for both phantom and in-vivo data.

Impact: The stretched radial trajectory enables sharper MRI imaging without longer scan times, benefiting clinicians with improved diagnostic detail, and requires minimal efforts to implement. This innovation enhances imaging in low-performance MRI systems, potentially extending advanced diagnostics to underserved regions.

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.