Zahra Shams1, Evita C. Wiegers1, Wybe J.M. van der Kemp1, Dennis W.J. Klomp1, and Jannie P. Wijnen1
1Department of radiology, University Medical Center Utrecht, Utrecht, Netherlands
1Department of radiology, University Medical Center Utrecht, Utrecht, Netherlands
We designed a dual-band pulse to selectively
refocus PME and PDE spins. The dual band pulse, with B1+ <
15µT, uses almost 3 times less power compared
to a single band pulse, making this an attractive option for multi-echo 31P
body MRSI in cancer.
Figure 3. The spectra acquired in vivo from a pulse acquire and
a spin echo acquisition with the dual band pulse aimed to hit the PDE and PME
spin groups from the entire head, where B0 shimming is optimized over the
yellow box. All MR spectra were displayed using a 10‐Hz Lorentzian
line‐broadening filter. Note the well refocused signals of PME and PDE.
Figure 2. Spectra acquired from a phantom with a spin echo (A)
and a pulse acquire (B) acquisition. The dual band pulse at the frequency
offset 3 resulted in a full refocusing of the three peaks of PE, PC and GPC.
All MR spectra were displayed using a 10‐Hz Lorentzian line‐broadening filter.
The yellow box is the shim box.