Optimum b value for resolving crossing fibers: a study with standard clinical b value using 1.5-T MR
Tóm tắt
We sought to investigate the optimum b value for resolving crossing fiber using high-angular resolution diffusion imaging (HARDI)-based multi-tensor tractography. The study tested the standard b values that are commonly used in the routine clinical setting. Ten normal volunteers (five men and five women) with a mean age of 26.3 years (range, 22–32 years) were scanned using a 1.5-T clinical magnetic resonance unit. Single-shot echo-planar imaging was used for diffusion-weighted imaging with a diffusion-sensitizing gradient in 32 orientations. The b values of 700, 1,400, 2,100, and 2,800 s/m2 were used. Data postprocessing was performed using multi-tensor methods. The depiction of the optic nerves, optic tracts, and decussation of superior cerebellar peduncles were assessed. The depictions of the nerve fibers were independent of the b values tested. The depiction of crossing fibers by HARDI-based multi-tensor tractography is not substantially influenced by b values ranging from 700 to 2,800 s/m2. Thus, the optimum b value within this range may be the lowest one considering the higher signal to noise ratio.
Tài liệu tham khảo
Mori S, Crain BJ, Chacko VP, van Zijl PC (1999) Three-dimensional tracking of axonal projections in the brain by magnetic resonance imaging. Ann Neurol 45:265–269. doi:10.1002/1531-8249(199902)45:2<265::AID-ANA21>3.0.CO;2-3
Mukherjee P (2005) Diffusion tensor imaging and fiber tractography in acute stroke. Neuroimaging Clin N Am 15:655–665. doi:10.1016/j.nic.2005.08.010
Holodny AI, Ollenschleger MD, Liu WC, Schulder M, Kalnin AJ (2001) Identification of the corticospinal tracts achieved using blood-oxygen-level-dependent and diffusion functional MR imaging in patients with brain tumors. AJNR Am J Neuroradiol 22:83–88
Alexander AL, Hasan KM, Lazar M, Tsuruda JS, Parker DL (2001) Analysis of partial volume effects in diffusion-tensor MRI. Magn Reson Med 45:770–780. doi:10.1002/mrm.1105
Frank LR (2002) Characterization of anisotropy in high angular resolution diffusion-weighted MRI. Magn Reson Med 47:1083–1099. doi:10.1002/mrm.10156
Alexander DC, Barker GJ, Arridge SR (2002) Detection and modeling of non-Gaussian apparent diffusion coefficient profiles in human brain data. Magn Reson Med 48:331–340. doi:10.1002/mrm.10209
Tuch DS, Wedeen VJ, Dale AM, George JS, Belliveau JW (1999) Conductivity mapping of biological tissue using diffusion MRI. Ann NY Acad Sci 888:314–316. doi:10.1111/j.1749-6632.1999.tb07965.x
von dem Hagen EA, Henkelman RM (2002) Orientational diffusion reflects fiber structure within a voxel. Magn Reson Med 48:454–459. doi:10.1002/mrm.10250
Tournier JD, Calamante F, Gadian DG, Connelly A (2004) Direct estimation of the fiber orientation density function from diffusion-weighted MRI data using spherical deconvolution. NeuroImage 23:1176–1185. doi:10.1016/j.neuroimage.2004.07.037
Wedeen VJ, Hagmann P, Tseng WY, Reese TG, Weisskoff RM (2005) Mapping complex tissue architecture with diffusion spectrum magnetic resonance imaging. Magn Reson Med 54:1377–1386. doi:10.1002/mrm.20642
Tuch DS (2004) Q-ball imaging. Magn Reson Med 52:1358–1372. doi:10.1002/mrm.20279
Kreher BW, Schneider JF, Mader I, Martin E, Hennig J, Il'yasov KA (2005) Multitensor approach for analysis and tracking of complex fiber configurations. Magn Reson Med 54:1216–1225. doi:10.1002/mrm.20670
Staempfli P, Jaermann T, Crelier GR, Kollias S, Valavanis A, Boesiger P (2006) Resolving fiber crossing using advanced fast marching tractography based on diffusion tensor imaging. NeuroImage 30:110–120. doi:10.1016/j.neuroimage.2005.09.027
Netsch T, van Muiswinkel A (2004) Quantitative evaluation of image-based distortion correction in diffusion tensor imaging. IEEE Trans Med Imag 23:789–798. doi:10.1109/TMI.2004.827479
National Electrical Manufacturers Association (2008) Determination of signal-to-noise ratio (SNR) in diagnostic magnetic resonance imaging. NEMA standard publication MS 1-2008.
Tuch DS, Reese TG, Wiegell MR, Makris N, Belliveau JW, Wedeen VJ (2002) High angular resolution diffusion imaging reveals intravoxel white matter fiber heterogeneity. Magn Reson Med 48:577–582. doi:10.1002/mrm.10268
Conturo TE, McKinstry RC, Aronovitz JA, Neil JJ (1995) Diffusion MRI: precision, accuracy and flow effects. NMR Biomed 8:307–332. doi:10.1002/nbm.1940080706
Burdette JH, Elster AD (2002) Diffusion-weighted imaging of cerebral infarctions: are higher B values better? J Comput Assist Tomogr 26:622–627
Behrens TE, Berg HJ, Jbabdi S, Rushworth MF, Woolrich MW (2007) Probabilistic diffusion tractography with multiple fibre orientations: what can we gain? NeuroImage 34:144–155. doi:10.1016/j.neuroimage.2006.09.018