Fully balanced steady-state 3D-spin-echo (bSSSE) imaging at 3 Tesla Export

@article{citeulike:3250827, abstract = {In this work a 3D fully balanced steady-state spin-echo sequence (bSSSE) was designed and implemented on a 3-Tesla whole-body MR scanner. In contrast to previously introduced nonbalanced SSSE (nbSSSE) sequences, bSSSE features fully rewound imaging gradients. Additionally, all phase encodings and the readout prephasing are performed after the refocusing pulse. Its performance was compared with previously used gradient-echo (GE) and nbSSSE sequences. The signal response of each sequence was simulated by numerical solution of the Bloch equation. All sequences were then optimized based on these simulations for high-resolution (HR) imaging of tissues with short relaxation times and applied to in vivo HR-MRI of trabecular bone. bSSSE outperformed nbSSSE sequences in terms of SNR and SNR efficiency. Measurements of structural bone parameters revealed thinner trabeculae and a lower bone/bone-marrow fraction for the bSSSE sequence compared to the nbSSSE sequence. By applying a parallel imaging technique based on generalized autocalibrating partially parallel acquisition (GRAPPA) with a reduction factor of 2, we were able to maintain a clinically feasible scan time using bSSSE. Comparisons of structural bone parameters revealed a difference of less than 3\% for all structural parameters between parallel and conventional imaging. Magn Reson Med, 2006. {\copyright} 2006 Wiley-Liss, Inc.}, address = {Musculoskeletal and Quantitative Imaging Research (MQIR), Department of Radiology, University of California-San Francisco, San Francisco, California, USA; Applied Science Lab West, GE Healthcare, Menlo Park, California, USA}, author = {Krug, R. and Han, E. T. and Banerjee, S. and Majumdar, S.}, citeulike-article-id = {3250827}, citeulike-linkout-0 = {http://dx.doi.org/10.1002/mrm.21037}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/113319324/ABSTRACT}, doi = {10.1002/mrm.21037}, journal = {Magnetic Resonance in Medicine}, keywords = {bone, bssse, mri, nmr, steady-state}, number = {5}, pages = {1033--1040}, posted-at = {2008-09-12 18:33:27}, priority = {3}, title = {Fully balanced steady-state 3D-spin-echo (bSSSE) imaging at 3 Tesla}, url = {http://dx.doi.org/10.1002/mrm.21037}, volume = {56}, year = {2006} }

TY - JOUR ID - citeulike:3250827 L3 - citeulike-article-id:3250827 N2 - In this work a 3D fully balanced steady-state spin-echo sequence (bSSSE) was designed and implemented on a 3-Tesla whole-body MR scanner. In contrast to previously introduced nonbalanced SSSE (nbSSSE) sequences, bSSSE features fully rewound imaging gradients. Additionally, all phase encodings and the readout prephasing are performed after the refocusing pulse. Its performance was compared with previously used gradient-echo (GE) and nbSSSE sequences. The signal response of each sequence was simulated by numerical solution of the Bloch equation. All sequences were then optimized based on these simulations for high-resolution (HR) imaging of tissues with short relaxation times and applied to in vivo HR-MRI of trabecular bone. bSSSE outperformed nbSSSE sequences in terms of SNR and SNR efficiency. Measurements of structural bone parameters revealed thinner trabeculae and a lower bone/bone-marrow fraction for the bSSSE sequence compared to the nbSSSE sequence. By applying a parallel imaging technique based on generalized autocalibrating partially parallel acquisition (GRAPPA) with a reduction factor of 2, we were able to maintain a clinically feasible scan time using bSSSE. Comparisons of structural bone parameters revealed a difference of less than 3% for all structural parameters between parallel and conventional imaging. Magn Reson Med, 2006. © 2006 Wiley-Liss, Inc. IS - 5 JF - Magnetic Resonance in Medicine AD - Musculoskeletal and Quantitative Imaging Research (MQIR), Department of Radiology, University of California-San Francisco, San Francisco, California, USA; Applied Science Lab West, GE Healthcare, Menlo Park, California, USA EP - 1040 TI - Fully balanced steady-state 3D-spin-echo (bSSSE) imaging at 3 Tesla VL - 56 SP - 1033 KW - bone KW - bssse KW - mri KW - nmr KW - steady-state AU - Krug, R AU - Han, ET AU - Banerjee, S AU - Majumdar, S PY - 2006/// UR - http://dx.doi.org/10.1002/mrm.21037 ER -