Keywords: Gradients, Gradients
Motivation: Strong gradients will shorten the echo time, increase the signal-to-noise ratio and can probe smaller diffusion length scales. Local gradient inserts can mitigate peripheral nerve stimuliation.
Goal(s): To characterize the gradient insert field strength and to show the feasibility of diffusion MRI with the gradient insert.
Approach: A 65 kg three-axis gradient coil was added to a 7T system. Gradient distributions were mapped using B0-field maps. 2D Pulsed Gradient Spin-Echo sequences with EPI readout were performed on a phantom.
Results: Field mapping showed gradient efficiency of [0.29, 0.31, 0.53]mT/m/A for the X,Y,Z-gradient respectively. Pulsed Gradient Spin-Echo sequences with b=[5,21]s/mm2 showed sensible signal attenuation.
Impact: Plug-and-play gradients provide a cost-effective alternative to expensive MRI systems with dedicated high-performance gradients. They improve accessibility for researchers with limited resources to conduct advanced diffusion, structural, and functional MRI experiments.
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.
Keywords