Decoupling of Tx/Rx Coils Using a Tx-Array System: Application to UTE and CEA

Ali Caglar Ozen¹, ², Ergin Atalar¹, ²

A novel method for decoupling that provides over 80dB isolation between receive and transmit coils is developed. Transmit array technology is utilized to cancel the individual B1 induced currents in the receive coil by adjusting relative amplitudes and phases of transmit array elements. As an application of this method, MRI with concurrent excitation and acquisition (CEA), where MR signal is acquired during RF excitation, is implemented and spectroscopy and frequency-swept imaging techniques are demonstrated. CEA enable observation of spin characteristics during RF excitation as well as zero-TE. Preliminary results are represented for spectroscopy and imaging of ultra-short T2 samples.