Meeting Banner
Abstract #1504

A radiolucent and flexible high impedance coil array to improve the imaging performance of a 1.5T MR-linac

Stefan E. Zijlema1, Luca van Dijk1, Jan J.W. Lagendijk1, Rob H.N. Tijssen1, and Cornelis A.T. van den Berg1

1Radiotherapy, UMC Utrecht, Utrecht, Netherlands

High impedance coils (HICs) are interesting for use in dense receive arrays for the MR-linac, as they lack lumped elements that attenuate radiation. Furthermore, HICs are flexible and exhibit low channel coupling, simplifying high-density array development.

We compared the performance of a 20-channel prototype setup with the current clinical array and investigated its dosimetric feasibility.

The prototype showed higher SNR values and lower g-factors, thus allowing for higher acceleration factors and faster imaging. Dosimetrically, no clinically significant attenuation was found (<1.5%).

In conclusion, flexible HIC based arrays are highly suitable to construct high density arrays for MRI-guided radiotherapy applications.

This abstract and the presentation materials are available to members only; a login is required.

Join Here