Abstract #1329

A 16-channel MR-PET array coil for high-resolution parallel transmit brain imaging at 7T

Azma Mareyam¹, John E Kirsch^1,2, Ehsan Kazemivalipour^1,2, Michele Scipioni^1,2, Magdelena Suriano Allen^1,3, Jeffrey Short¹, Hammodi Almurani¹, Ciprian Catana^1,2, and Lawrence L Wald^1,2,4

¹Radiology, A.A.Martinos Center of Biomedical Imaging/Massachusetts General Hospital, Charlestown, MA, United States, ²Harvard Medical School, Boston, MA, United States, ³Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, United States, ⁴Harvard-MIT Division of Health Sciences Technology, Cambridge, MA, United States

Synopsis

Keywords: PET/MR, Parallel Imaging, MR-PET 7T array

Motivation: We are developing the Human Dynamic NeuroChemical Connectome, a high spatio-temporal resolution brain PET (HSTR-BrainPET) scanner integrated with a 7T MR system

Goal(s): To build a 16-channel PET-compatible RF coil with parallel transmit capability based on an 8-channel test array for high-resolution imaging.

Approach: We designed and built multi-channel transmit-receive coils with RF screen that fits inside the spherical geometry of the PET camera. Coil performance was characterized with and without PET modules present.

Results: The performance of the 8-channel coil was satisfactory. Preliminary tests with the 16-channel array showed some loss in sensitivity in the CP mode.

Impact: By designing a 16-channel transmit-receive RF head coil and RF screen that both conform to the novel spherical geometry PET camera, we can acquire high-quality MR data simultaneously with PET data while also minimizing 511 keV photon attenuation.

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