Abstract #3554

Vibroacoustic Noise Reduction in High Performance Head Gradient Coils Using Ceramic Inserts

Simone Angela Winkler¹, Andrew Alejski², Trevor Wade², Charles McKenzie², and Brian K Rutt¹

¹Dept. of Radiology, Stanford University, Stanford, CA, United States, ²Robarts Research Institute, The University of Western Ontario, London, ON, Canada

We hypothesized that ceramic inserts will reduce sound pressure levels (SPLs) in high performance head gradient coils. We used realistic multi-physics modeling methods (previously validated by experiments) to investigate this hypothesis, and in particular to evaluate vibroacoustic reductions as a function of ceramic insert geometry and frequency of excitation. Averaged over the range 0-3000Hz, we demonstrate a maximum overall SPL reduction of 10.9dB, with a substantially higher reduction in the high frequency regime (2000-3000Hz) of 20.7dB. We show that a uniform 15mm thick cylindrical insert is a practical design that yields the majority of the acoustic reduction benefit.

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.