Meeting Banner
Abstract #3286

Reducing ringing artifacts in dynamic pulmonary MRI with a golden-step based interleaving approach for 3D ultra-short TE acquisition

Zekang Ding1,2, Huajun She1, and Yiping P. Du1
1School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China, 2Central Research Institute, United Imaging Healthcare, Shanghai, China

Synopsis

Keywords: New Trajectories & Spatial Encoding Methods, Data Acquisition, Interleaved acquisition, Ringing artifacts

Motivation: In 3D radial ultra-short TE based dynamic pulmonary MRI, 3D radial k-space is usually segmented into multiple interleaves for interleaved acquisition. Motion-resolved k-space data are obtained subsequently by retrospectively binning using respiratory signals. Diaphragm drifting has been commonly observed during the scan, resulting in non-uniform spherical distribution of sampling density in motion-resolved k-space and ringing artifacts in reconstructed images.

Goal(s): To reduce ringing artifacts in motion-resolved images.

Approach: A golden-step based interleaving approach is proposed to mitigate adversary effect of diaphragm drifting.

Results: Ringing artifacts in dynamic images acquired with conventional interleaving approach are significantly reduced in that acquired with proposed interleaving approach.

Impact: Using golden-step based interleaving approach, uniform motion-resolved k-spaces can be obtained even under severe diaphragm drifting. This proposed approach has potential to reduce ringing artifacts in other non-Cartesian acquisitions and applications, such as bSSFP-based free-breathing cardiac MRI and real-time MRI.

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