Principles of magnetic resonance assessment of brain function

Journal of Magnetic Resonance Imaging

Volumn 23, Issue 6, 2006, Pages 794-807

  Norris, David G ^a  

^a RADBOUD UNIVERSITY NIJMEGEN   (Netherlands)

Author keywords

BOLD contrast; Brain activation studies; Cerebral blood flow; Echo planar imaging; Functional imaging techniques

Indexed keywords

ARTERIAL SPIN LABELING; BLOOD OXYGENATION; BLOOD OXYGENATION LEVEL DEPENDENT CONTRAST; BRAIN BLOOD FLOW; BRAIN BLOOD VOLUME; BRAIN FUNCTION; BRAIN MAPPING; COGNITION; DIFFUSION TENSOR IMAGING; ECHO PLANAR IMAGING; FUNCTIONAL MAGNETIC RESONANCE IMAGING; HUMAN; MAGNETIC FIELD; NEUROIMAGING; NUCLEAR MAGNETIC RESONANCE IMAGING; PRIORITY JOURNAL; REVIEW; SIGNAL NOISE RATIO;

ALGORITHMS; ANIMALS; BRAIN; BRAIN MAPPING; CEREBROVASCULAR CIRCULATION; COMPUTER SIMULATION; EVOKED POTENTIALS; HUMANS; IMAGE INTERPRETATION, COMPUTER-ASSISTED; MAGNETIC RESONANCE IMAGING; MODELS, NEUROLOGICAL; OXYGEN;

EID: 33744742957     PISSN: 10531807     EISSN: 15222586     Source Type: Journal    
DOI: 10.1002/jmri.20587     Document Type: Review

References (125)

1. Ogawa S, Lee T, Nayak AS, Glynn P. Oxygenation-sensitive contrast in magnetic resonance image of rodent brain at high magnetic fields. Magn Reson Med 1990;14:68-78.
2. Ogawa S, Lee TM, Kay AR, Tank DW. Brain magnetic resonance imaging with contrast dependent on blood oxygenation. Proc Natl Acad Sci USA 1990;87:9868-9872.
3. Vlieger EJ, Majoie CB, Leenstra S, Den Heeten GJ. Functional magnetic resonance imaging for neurosurgical planning in neurooncology. Eur Radiol 2004;14:1143-1153.
4. Marota JJA, Mandeville JB, Weisskoff RM, Moskowitz MA, Rosen BR, Kosofsky BE. Cocaine activation discriminates dopaminergic projections by temporal response: an fMRI study in rat. Neuroimage 2000;11:13-23.
5. Mansfield P. Multi-planar image formation using NMR spin echoes. J Phys C 1977;10:L55-L58.
6. Schulte ML, Wood JD, Hudetz AG. Cortical electrical stimulation alters erythrocyte perfusion pattern in the cerebral capillary network of the rat. Brain Res 2003;963:81-92.
7. Mandeville JB, Marota JJ, Ayata C, et al. Evidence of a cerebrovascular postarteriole windkessel with delayed compliance. J Cereb Blood Flow Metab 1999;19:679-689.
8. Hennig J, Ernst T, Speck O, Deuschl G, Feifel E. Detection of brain activation using oxygenation sensitive functional spectroscopy. Magn Reson Med 1994;31:85-90.
9. de Zwart JA, Silva AC, van Gelderen P, et al. Temporal dynamics of the BOLD fMRI impulse response. Neuroimage 2005;24:667-677.
10. Frahm J, Krüger G, Merboldt KD, Kleinschmidt A. Dynamic uncoupling and recoupling of perfusion and oxidative metabolism during focal brain activation in man. Magn Reson Med 1996;35:143-148.
11. Buxton RB. The elusive initial dip. Neuroimage 2001;13:953-958.
12. Buxton RB, Uludag K, Dubowitz DJ, Liu TT. Modeling the hemodynamic response to brain activation. Neuroimage 2004;23(Suppl 1):S220-S233.
13. Devor A, Dunn AK, Andermann ML, Ulbert I, Boas DA, Dale AM. Coupling of total hemoglobin concentration, oxygenation, and neural activity in rat somatosensory cortex. Neuron 2003;39:353-359.
14. Buxton RB, Wong EC, Frank LR. Dynamics of blood flow and oxygenation changes during brain activation: the balloon model. Magn Reson Med 1998;39:855-864.
15. Lu H, Golay X, Pekar JJ, Van Zijl PC. Sustained poststimulus elevation in cerebral oxygen utilization after vascular recovery. J Cereb Blood Flow Metab 2004;24:764-770.
16. Ogawa S, Menon RS, Tank DW, et al. Functional brain mapping by blood oxygenation level-dependent contrast magnetic-resonance-imaging - a comparison of signal characteristics with a biophysical model. Biophys J 1993;64:803-812.
17. Rauscher A, Sedlacik J, Barth M, Haacke EM, Reichenbach JR. Noninvasive assessment of vascular architecture and function during modulated blood oxygenation using susceptibility weighted magnetic resonance imaging. Magn Reson Med 2005;54:87-95.
18. Gardener AG, Gowland PA, Francis ST. Measuring blood oxygenation at 2.35 T using a multi-echo sequence. In: Proceedings of the 12th Annual Meeting of ISMRM, Kyoto, Japan, 2004. (abstract 46).
19. Stefanovic B, Pike GB. Human whole-blood relaxometry at 1.5T: assessment of diffusion and exchange models. Magn Reson Med 2004;52:716-723.
20. Yablonskiy DA, Haacke EM. Theory of NMR signal behavior in magnetically inhomogeneous tissues-the static dephasing regime. Magn Reson Med 1994;32:749-763.
21. Haacke EM, Lai S, Yablonskiy DA, Lin WL. In-vivo validation of the bold mechanism-a review of signal changes in gradient-echo functional MRI in the presence of flow. Int J Imag Sys Tech 1995;6:153-163.
22. Boxerman JL, Bandettini PA, Kwong KK, et al. The intravascular contribution to fMRI signal change: Monte Carlo modeling and diffusion-weighted studies in vivo. Magn Reson Med 1995;34:4-10.
23. Song AW, Wong EC, Tan SG, Hyde JS. Diffusion weighted fMRI at 1.5 T. Magn Reson Med 1996;35:155-158.
24. Hoogenraad FGC, Pouwels PJW, Hofman MBM, Reichenbach JR, Sprenger M, Haacke EM. Quantitative differentiation between BOLD models in fMRI. Magn Reson Med 2001;45:233-246.
25. Jones RA, Schirmer T, Lipinski B, Elbel GK, Auer DP. Signal undershoots following visual stimulation: A comparison of gradient and spin-echo BOLD sequences. Magn Reson Med 1998;40:112-118.
26. Oja JM, Gillen J, Kauppinen RA, Kraut M, van Zijl PCM. Venous blood effects in spin-echo fMRI of human brain. Magn Reson Med 1999;42:617-626.
27. Norris DG, Zysset S, Mildner T, Wiggins GJ. An investigation of the value of spin-echo based fMRI using a stroop colour-word matching task and EPI at 3 Tesla. Neuroimage 2002;15:719-726.
28. Jochimsen TH, Norris DG, Mildner T, Moller HE. Quantifying the intra- and extravascular contributions to spin-echo fMRI at 3 T. Magn Reson Med 2004;52:724.
29. Buxton RB, Luh WM, Wong EC, Frank LR, Bandettini PA. Diffusion weighting attenuates the BOLD peak signal change but not the post-stimulus undershoot. In: Proceedings of the 6th Annual Meeting of ISMRM, Sydney. Australia, 1998. (abstract 7).
30. Mathiesen C, Caesar K, Akgoren N, Lauritzen M. Modification of activity-dependent increases of cerebral blood flow by excitatory synaptic activity and spikes in rat cerebellar cortex. J Physiol 1998;512:555-566.
31. Thomsen K, Offenhauser N, Lauritzen M. Principal neuron spiking: neither necessary nor sufficient for cerebral blood flow in rat cerebellum. J Physiol 2004;560:181-189.
32. Lauritzen M. Reading vascular changes in brain imaging: is dendritic calcium the key? Nat Rev Neurosci 2005;6:77-85.
33. Logothetis NK, Pauls J, Augath M, Trinath T, Oeltermann A. Neurophysiological investigation of the basis of the fMRI signal. Nature 2001;412:150-157.
34. Attwell D, Iadecola C. The neural basis of functional brain imaging signals. Trends Neurosci 2002;25:621-625.
35. Dimagl U, Lindauer U, Villringer A. Role of nitric-oxide in the coupling of cerebral blood-flow to neuronal activation in rats. Neurosci Lett 1993;149:43-46.
36. Mukamel R, Gelbard H, Arieli A, Hasson U, Fried I, Malach R. Coupling between neuronal firing, field potentials, and fMRI in human auditory cortex. Science 2005;309:951-954.
37. Fox PT, Raichle ME. Focal physiological uncoupling of cerebral blood-flow and oxidative-metabolism during somatosensory stimulation in human-subjects. Proc Natl Acad Sci USA 1986;83:1140-1144.
38. Hyder F, Shulman RG, Rothman DL. A model for the regulation of cerebral oxygen delivery. J Appl Physiol 1998;85:554-564.
39. Hoge RD, Atkinson J, Gill B, Crelier GR, Marrett S, Pike GB. Investigation of BOLD signal dependence on cerebral blood flow and oxygen consumption: the deoxyhemoglobin dilution model. Magn Reson Med 1999;42:849-863.
40. Hoge RD, Atkinson J, Gill B, Crelier GR, Marrett S, Pike GB. Linear coupling between cerebral blood flow and oxygen consumption in activated human cortex. Proc Natl Acad Sci USA 1999;96:9403-9408.
41. Buxton RB, Frank LR. A model for the coupling between cerebral blood flow and oxygen metabolism during neural stimulation. J Cereb Blood Flow Metab 1997;17:64-72.
42. Malonek D, Grinvald A. Interactions between electrical activity and cortical microcirculation revealed by imaging spectroscopy: implications for functional brain mapping. Science 1996;272:551-554.
43. Jones M, Berwick J, Johnston D, Mayhew J. Concurrent optical imaging spectroscopy and laser-Doppler flowmetry: the relationship between blood flow, oxygenation, and volume in rodent barrel cortex. Neuroimage 2001;13:1002-1015.
44. Lindauer U, Royl G, Leithner C, et al. No evidence for early decrease in blood oxygenation in rat whisker cortex in response to functional activation. Neuroimage 2001;13:988-1001.
45. Devor A, Ulbert I, Dunn AK, et al. Coupling of the cortical hemodynamic response to cortical and thalamic neuronal activity. Proc Natl Acad Sci USA 2005;102:3822-3827.
46. Engel SA, Glover GH, Wandell BA. Retinotopic organization in human visual cortex and the spatial precision of functional MRI. Cereb Cortex 1997;7:181-192.
47. Engel SA, Rumelhart DE, Wandell BA, et al. FMRI of human visual-cortex. Nature 1994;369:525.
48. Oja JME, Gillen JS, Kauppinen RA, Kraut M, van Zijl PCM. Determination of oxygen extraction ratios by magnetic resonance imaging. J Cereb Blood Flow Metab 1999;19:1289-1295.
49. Barth M, Moser E. Proton NMR relaxation times of human blood samples at 1.5 T and implications for functional MRI. Cell Mol Biol 1997;43:783-791.
50. Yacoub E, Shmuel A, Pfeuffer J, et al. Imaging brain function in humans at 7 Tesla. Magn Reson Med 2001;45:588-594.
51. Krüger G, Kastrup A, Glover GH. Neuroimaging at 1.5 T and 3.0 T: comparison of oxygenation-sensitive magnetic resonance imaging. Magn Reson Med 2001;45:595-604.
52. Wansapura JP, Holland SK, Dunn RS, Ball WS. NMR relaxation times in the human brain at 3.0 Tesla. J Magn Reson Imaging 1999;9:531-538.
53. Jezzard P, Duewell S, Balaban RS. MR relaxation times in human brain: Measurement at 4 T. Radiology 1996;199:773-779.
54. Zhao F, Wang P, Kim SG. Cortical depth-dependent gradient-echo and spin-echo BOLD fMRI at 9.4T. Magn Reson Med 2004;51:518-524.
55. Silva AC, Koretsky AP. Laminar specificity of functional MRI onset times during somatosensory stimulation in rat. Proc Natl Acad Sci USA 2002;99:15182-15187.
56. Parkes LM, Schwarzbach J, Bouts AA, et al. Quantifying the spatial resolution of the gradient echo and spin echo BOLD response at 3 Tesla. Magn Reson Med. 2005;54:1465-1472.
57. Olman CA, Van de Moortele PF, Ugurbil K. Point spread function for gradient echo and spin echo BOLD fMRI at 7 Tesla. In: Proceedings of the 12th Annual Meeting of ISMRM, Kyoto, Japan, 2004. (abstract 1066).
58. Park JC, Ronen I, Kim D-S, Ugurbil K. Spatial specificity of high resolution gradient echo (GE) and spin echo (SE) BOLD fMRI in cat visual cortex at 9.4T. In: Proceedings of the 13th Annual Meeting of ISMRM, Miami Beach, FL, USA, 2005. (abstract 31).
59. Yacoub E, Van De Moortele PF, Shmuel A, Ugurbil K. Signal and noise characteristics of Hahn SE and GE BOLD fMRI at 7 T in humans. Neuroimage 2005;24:738-750.
60. Friston KJ, Josephs O, Rees G, Turner R. Nonlinear event-related responses in fMRI. Magn Reson Med 1998;39:41-52.
61. Boynton GM, Engel SA, Glover GH, Heeger DJ. Linear systems analysis of functional magnetic resonance imaging in human V1. J Neurosci 1996;16:4207-4221.
62. Glover GH. Deconvolution of impulse response in event-related BOLD fMRI. Neuroimage 1999;9:416-429.
63. Rosen BR, Buckner RL, Dale AM. Event-related functional MRI: past, present, and future. Proc Natl Acad Sci USA 1998;95:773-780.
64. Schmitt F, Stehling MK, Turner R. Echo-planar imaging theory, technique and application. Berlin: Springer: 1998.
65. Yacoub E, Duong TQ, Van De Moortele PF, et al. Spin-echo fMRI in humans using high spatial resolutions and high magnetic fields. Magn Reson Med 2003;49:655-664.
66. Pfeuffer J, van de Moortele PF, Yacoub E, et al. Zoomed functional imaging in the human brain at 7 Tesla with simultaneous high spatial and high temporal resolution. Neuroimage 2002;17:272-286.
67. Weiskopf N, Klose U, Birbaumer N, Mathiak K. Single-shot compensation of image optimization using multi-echo EPI distortions and BOLD contrast for real-time fMRI. Neuroimage 2005;24:1068-1079.
68. Zaitsev M, Hennig J, Speck O. Point spread function mapping with parallel imaging techniques and high acceleration factors: Fast, robust, and flexible method for echo-planar imaging distortion correction. Magn Reson Med 2004;52:1156-1166.
69. Morgan PS, Bowtell RW, McIntyre DJO, Worthington BS. Correction of spatial distortion in EPI due to inhomogeneous static magnetic fields using the reversed gradient method. J Magn Reson Imaging 2004;19:499-507.
70. Chen NK, Wyrwicz AM. Optimized distortion correction technique for echo planar imaging. Magn Reson Med 2001;45:525-528.
71. Jezzard P, Balaban RS. Correction for geometric distortion in echo-planar images from BO field variations. Magn Reson Med 1995;34:65-73.
72. Hutton C, Bork A, Josephs O, Deichmann R, Ashburner J, Turner R. Image distortion correction in fMRI: a quantitative evaluation. Neuroimage 2002;16:217-240.
73. Deichmann R, Josephs O, Hutton C, Corfield DR, Turner R. Compensation of susceptibility-induced BOLD sensitivity losses in echo-planar fMRI imaging. Neuroimage 2002;15:120-135.
74. Frahm J, Merboldt KD, Hänicke W. Direct FLASH MR imaging of magnetic-field inhomogeneities by gradient compensation. Magn Reson Med 1988;6:474-480.
75. van Gelderen P, Ramsey NF, Liu GY, et al. 3-dimensional functional magnetic-resonance-imaging of human brain on a clinical 1,5-T scanner. Proc Natl Acad Sci USA 1995;92:6906-6910.
76. Hoogenraad FG, Pouwels PJ, Hofman MB, et al. High-resolution segmented EPI in a motor task fMRI study. Magn Reson Imaging 2000;18:405-409.
77. Kim SG, Hu X, Adriany G, Ugurbil K. Fast interleaved echo-planar imaging with navigator: high resolution anatomic and functional images at 4 Tesla. Magn Reson Med 1996;35:895-902.
78. Ahn CB, Kim JH, Cho ZH. High-speed spiral-scan echo planar NMR imaging - I. IEEE Trans Med Imaging 1986;MI-5:2-7.
79. Meyer CH, Hu BS, Nishimura DG, Macovski A. Fast spiral coronary-artery imaging. Magn Reson Med 1992;28:202-213.
80. Lai S, Glover GH. Three-dimensional spiral fMRI technique: a comparison with 2D spiral acquisition. Magn Reson Med 1998;39:68-78.
81. Börnert P, Aldefeld B, Eggers H. Reversed spiral MR imaging. Magn Reson Med 2000;44:479-484.
82. Glover GH, Law CS. Spiral-in/out BOLD fMRI for increased SNR and reduced susceptibility artifacts. Magn Reson Med 2001;46:515-522.
83. Frahm J, Merboldt KD, Hänicke W. Functional MRI of human brain activation at high spatial resolution. Magn Reson Med 1993;29:139-144.
84. Liu G, Sobering G, Duyn J, Moonen CT. A functional MRI technique combining principles of echo-shifting with a train of observations (PRESTO). Magn Reson Med 1993;30:764-768.
85. Sodickson DK, Manning WJ. Simultaneous acquisition of spatial harmonics (SMASH): fast imaging with radiofrequency coil arrays. Magn Reson Med 1997;38:591-603.
86. Pruessmann KP, Weiger M, Scheidegger MB, Boesiger P. SENSE: sensitivity encoding for fast MRI. Magn Reson Med 1999;42:952-962.
87. Preibisch C, Pilatus U, Bunke J, Hoogenraad F, Zanella F, Lanfermann H. Functional MRI using sensitivity-encoded echo planar imaging (SENSE-EPI). Neuroimage 2003;19:412-421.
88. de Zwart JA, van Gelderen P, Kellman P, Duyn JH. Application of sensitivity-encoded echo-planar imaging for blood oxygen level-dependent functional brain imaging. Magn Reson Med 2002;48:1011-1020.
89. Weisskoff RM, Baker J, Belliveau JW, et al. Power spectrum analysis of functionally-weighted MR data: What's in the noise? In: Proceedings of the 12th Annual Meeting of SMRM, New York, NY, USA, 1993. (abstract 7).
90. Krüger G, Glover GH. Physiological noise in oxygenation-sensitive magnetic resonance imaging. Magn Reson Med 2001;46:631-637.
91. Bodurka J, Ye F, Petridou N, Bandettini PA. Voxel-wise mapping of optimal MRI voxel volume. In: Proceedings of the 13th Annual Meeting of ISMRM, Miami Beach, FL, USA, 2005. (abstract 1556).
92. Triantafyllou C, Hoge RD, Krüger G, et al. Comparison of physiological noise at 1.5 T, 3 T and 7 T and optimization of fMRI acquisition parameters. Neuroimage 2005;26:243-250.
93. Menon RS, Ogawa S, Tank DW, Ugurbil K. 4 Tesla gradient recalled echo characteristics of photic stimulation-induced signal changes in the human primary visual cortex. Magn Reson Med 1993;30:380-386.
94. Frahm J, Merboldt K-D, Hänicke W, Kleinschmidt A, Boecker H. Brain or vein-oxygenation or flow? On signal physiology in functional MRI of human brain activation. NMR Biomed 1994;7:45-53.
95. Turner R, Howseman A, Rees GE, Josephs O, Friston K. Functional magnetic resonance imaging of the human brain: data acquisition and analysis. Exp Brain Res 1998;123:5-12.
96. Constable RT, Spencer DD. Repetition time in echo planar functional MRI. Magn Reson Med 2001;46:748-755.
97. Josephs O, Henson RNA. Event-related functional magnetic resonance imaging: modelling, inference and optimization. Philos Trans R Soc Lond B Biol Sci 1999;354:1215-1228.
98. Ardekani BA, Bachman AH, Helpern JA. A quantitative comparison of motion detection algorithms in fMRI. Magn Reson Imaging 2001;19:959-963.
99. Oakes TR, Johnstone T, Ores Walsh KS, et al. Comparison of fMRI motion correction software tools. Neuroimage 2005;28:529-543.
100. Friston KJ, Williams S, Howard R, Frackowiak RSJ, Turner R. Movement-related effects in fMRI time-series. Magn Reson Med 1996;35:346-355.
101. Thesen S, Heod O, Mueller E, Schad LR. Prospective acquisition correction for head motion with image-based tracking for real-time fMRI. Magn Reson Med 2000;44:457-465.
102. Bini RM, Bandettini PA, Cox RW, Shaker R. Event-related fMRI of tasks involving brief motion. Hum Brain Mapp 1999;7:106-114.
103. de Lange FP, Hagoort P, Toni I. Neural topography and content of movement representations. J Cogn Neurosci 2005;17:97-112.
104. Williams DS, Detre JA, Leigh JS, Koretsky AP. Magnetic resonance imaging of perfusion using spin inversion of arterial water. Proc Natl Acad Sci USA 1992;89:212-216.
105. Calamante F, Thomas DL, Pell GS, Wiersma J, Turner R. Measuring cerebral blood flow using magnetic resonance imaging techniques. J Cereb Blood Flow Metab 1999;19:701-735.
106. Duong TQ, Yacoub E, Adriany G, et al. High-resolution, spin-echo BOLD, and CBF fMRI at 4 and 7 T. Magn Reson Med 2002;48:589-593.
107. Wang J, Aguirre GK, Kimberg DY, Roc AC, Li L, Detre JA. Arterial spin labeling perfusion fMRI with very low task frequency. Magn Reson Med 2003;49:796-802.
108. Liu TT, Wong EC, Frank LR, Buxton RB. Analysis and design of perfusion-based event-related fMRI experiments. Neuroimage 2002;16:269-282.
109. Belliveau JW, Rosen BR, Kantor HL, et al. Functional cerebral imaging by susceptibility-contrast NMR. Magn Reson Med 1990;14:538-546.
110. Belliveau JW, Kennedy DN, McKinstry RC, et al. Functional mapping of the human visual-cortex by magnetic-resonance-imaging. Science 1991;254:716-719.
111. Mandeville JB, Marota JJ, Kosofsky BE, et al. Dynamic functional imaging of relative cerebral blood volume during rat forepaw stimulation. Magn Reson Med 1998;39:615-624.
112. Francis ST, Pears JA, Butterworth S, Bowtell RW, Gowland PA. Measuring the change in CBV upon cortical activation with high temporal resolution using Look-Locker EPI and Gd-DTPA. Magn Reson Med 2003;50:483-492.
113. Lu H, Golay X. Pekar JJ, van Zijl PCM. Functional magnetic resonance imaging based on changes in vascular space occupancy. Magn Reson Med 2003;50:263-274.
114. Stefanovic B, Pike GB. Venous refocusing for volume estimation: VERVE functional magnetic resonance imaging. Magn Reson Med 2005;53:339-347.
115. Golanov EV, Yamamoto S, Reis DJ. Spontaneous waves of cerebral blood flow associated with a pattern of electrocortical activity. Am J Physiol 1994;266:R204-R214.
116. Biswal B, Yetkin FZ, Haughton VM, Hyde JS. Functional connectivity in the motor cortex of resting human brain using echoplanar MRI. Magn Reson Med 1995;34:537-541.
117. Lowe MJ, Mock BJ, Sorenson JA. Functional connectivity in single and multislice echoplanar imaging using resting-state fluctuations. Neuroimage 1998;7:119-132.
118. Greicius MD, Krasnow B, Reiss AL, Menon V. Functional connectivity in the resting brain: A network analysis of the default mode hypothesis. Proc Natl Acad Sci USA 2003;100:253-258.
119. Salvador R, Suckling J, Coleman MR, Pickard JD, Menon D, Bullmore E. Neurophysiological architecture of functional magnetic resonance images of human brain. Cereb Cortex 2005;15:1332-1342.
120. Lowe MJ, Phillips MD, Lurito JT, Mattson D, Dzemidzic M, Mathews VP. Multiple sclerosis: low-frequency temporal blood oxygen level-dependent fluctuations indicate reduced functional connectivity-initial results. Radiology 2002;224:184-192.
121. Basser PJ, Mattiello J, Le Bihan D. MR diffusion tensor spectroscopy and imaging. Biophys J 1994;66:259-267.
122. Mori S, Crain BJ, Chacko VP, van Zijl PCM. Three-dimensional tracking of axonal projections in the brain by magnetic resonance imaging. Ann Neurol 1999;45:265-269.
123. Behrens TEJ, Johansen-Berg H, Woolrich MW, et al. Non-invasive mapping of connections between human thalamus and cortex using diffusion imaging. Nat Neurosci 2003;6:750-757.
124. Catani M, Jones DK, Ffytche DH. Perisylvian language networks of the human brain. Ann Neurol 2005;57:8-16.
125. Posse S, Wiese S, Gembris D, et al. Enhancement of BOLD-contrast sensitivity by single-shot multi-echo functional MR Imaging. Magn Reson Med 1999;42:87-97.