Chao Ma1,2, Paul K. Han1,2, and Georges El Fakhri1,2
1Radiology, Massachusetts General Hospital, Boston, MA, United States, 2Radiology, Harvard Medical School, Boston, MA, United States
1Radiology, Massachusetts General Hospital, Boston, MA, United States, 2Radiology, Harvard Medical School, Boston, MA, United States
A new method is proposed for simultaneous mapping of metabolite concentration and T1 relaxation time with a fast inversion recovery-based MRSI sequence for data acquisition and a low-rank tensor-based method for simultaneous reconstruction of MRSI images at different TIs.
Figure 3. Maps of NAA, Cho, Cr, and mIns at different TIs obtained by the proposed method.
Figure 4. Representative spectra at different TIs from (a) low-resolution IR-MRSI (16x16) that were acquired using phase encoding gradients for spatial encoding and (b) the proposed high-resolution IR-MRSI (64x64), where the blue lines are the reconstructed spectra and the red lines are the fitted spectra.