Implementation of a new composite pulse for excitation in fast proton spectroscopic imaging at 1.5 T
Starcuk jr. Z, Krupa P, Starcuk Z, Starcukova J
Institute of Scientific Instruments, Academy of Sciences of the Czech Republic
A new chemical shift-selective composite pulse (1(x)-t-3.5(x)-t-3.2(x)-t-4.0(-x)-t-36.7(-x)-t-36.7(x)-t-4.0(x)-t-3.2(-x)-t-4(-x)) has been developed for the excitation in fast proton spectroscopic imaging at 1.5 T and implemented in sequences on a clinical system Siemens Symphony. The pulse provides a wide bandwidth of excited transverse magnetization framed by sufficiently broad null excitation bands, reducing the need for water/lipid presaturation. Pulse adjustment can control the residual water signal for internal referencing. First experimental results obtained with these sequences are presented. They demonstrate the applicability in measurements without water presaturation and the potential for TR reduction.