A 32 Channel RF array and integrated gradient insert

INTRODUCTION Neonatal MR is a particularly challenging application requiring fast imaging to reduce motion artifacts especially when anaesthetics are not used. However, on conventional MR system fast imaging sequences produce high levels of acoustic noise and can yield high SAR. Increased SNR and gradient strength can be achieved while obeying acoustic noise and SAR restrictions using smaller scale gradient coils and transmit-receive arrays. The aim of this project was to design and construct a 32 channel Transmit-Receive (TR) array and integrated local insert gradient set using a printed circuit board manufacturing technique for use with a neonatal incubator at 1.5T. The gradient and RF insert has been assembled and bench tested and the TR RF array coil initially tested at 1.5T through acquisition of MR FID signals from each of the 8 coils from one side of the array.