Abstract #4292

Measuring cardiac activity with a thermal noise based self-navigator

Robin Navest^1,2, Stefano Mandija^1,2, Stefan Zijlema^1,2, Luca van Dijk¹, Bjorn Stemkens¹, Jan Lagendijk¹, Anna Andreychenko^1,3, and Cornelis van den Berg^1,2

¹Radiotherapy, UMC Utrecht, Utrecht, Netherlands, ²Computational Imaging Group for MRI Diagnostics & Therapy, Center for Image Sciences, UMC Utrecht, Utrecht, Netherlands, ³Research and Practical Clinical Center of Diagnostics and Telemedicine Technologies of the Moscow Department of Healthcare, Moscow, Russian Federation

The ECG signal can be disturbed by the magnetohydrodynamic effect and requires placement of ECG electrodes. The latter adds extra workload in the patient setup. Moreover, for MRI-guided radiotherapy, ECG skin electrodes will interfere with dose delivery and thus cannot be used. We propose to use the noise navigator, a passive self-navigation method based on the physiological motion-induced modulation of the thermal noise variance measured by an RF receive coil, which does not require additional hardware and is inherently synchronized with MR acquisition.

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.