Meeting Banner
Abstract #2582

Silent 3D MRSI at Ultrasonic gradient speeds using a dual-axis head insert gradient at 7T

Thomas Roos1, Edwin Versteeg1, Max Bensink1, Kyung Min Nam1, Michael McGrory1, Mark Gosselink1, Hans Hoogduin1, Dimitri Welting1, Bas de Witte1, Matthias Wienke2, Wout Schuth2, Tom Delicaat2, Martino Borgo2, Joost van Straalen3, Martijn Heintges3, Dennis Klomp1, Jeroen C.W. Siero1,4, and Jannie Wijnen1
1Radiology, University Medical Center Utrecht, Utrecht, Netherlands, 2Futura Composites, Heerhugowaard, Netherlands, 3Prodrive Technologies, Eindhoven, Netherlands, 4Spinoza Centre for Neuroimaging, Amsterdam, Netherlands

Synopsis

Keywords: New Trajectories & Spatial Encoding Methods, High-Field MRI, MRSI, Spectroscopy, Insert Gradient, 20kHz, Ultrasonic, SSE, Silent, Gradient Amplifier, Resonant Gradients

Motivation: MRSI offers metabolic insights but suffers from long scan times, even at low resolutions. Techniques like EPSI are noisy and require multiple interleaves at 7T, limiting clinical feasibility.

Goal(s): Bring MRSI resolution and scan times closer to traditional imaging, without compromising spectral quality or patient comfort.

Approach: Silent encoding at 20 kHz using a dual-axis gradient accelerated 3D-FID-CSI (3.5×3.5×5 mm³) from 3h50min to 10min, validated with 7T scans, field camera, B0, and sound measurements.

Results: A series of novel technical improvements that demonstrate fast and high-resolution MRSI, without any of the typical trade-offs.

Impact: Ultrasonic encoding offers a paradigm shift in MRSI, bringing resolutions and scan times closer to imaging techniques. All without the typical trade-offs: preserving spectral bandwidth, while maintaining patient comfort by lacking gradient noise - paving the way for practical, high-resolution MRSI.

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