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First published online September 17, 2007
British Journal of Radiology (2007) 80, 782-789
© 2007 British Institute of Radiology
doi: 10.1259/bjr/99366083
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White matter tractography by diffusion tensor imaging plays an important role in prognosis estimation of acute lacunar infarctions

C Lai, MD 1 S Z Zhang, MD, PhD 2 H M Liu, BSc 3 Y B Zhou, BSc 1 Y Y Zhang, MSc 1 Q W Zhang, PhD 2 and G C Han, BSc 2

1 Department of Radiology, The Children's Hospital, 2 Department of Radiology, The Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 3 Department of Radiology, The Longsai Hospital, Ningbo, Zhejiang, China


Figure 1
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  		Figure 1. A 52-year-old woman with an acute infarct (white arrow) in the right corona radiata 1 day after onset. (a) Axial colour-coded directional image. (b) The lesion (yellow) in the axial colour-coded directional image. (c) Three-dimensional tractography superimposed on an axial isotropic diffusion-weighted image (from an anteriosuperior viewpoint). (d) Three-dimensional tractography superimposed on an axial colour-coded directional image (from an anteriosuperior viewpoint). The corticospinal tract (orange lines) of the affected cerebral hemisphere appears to be just medial to, but not to run through, the lacunar infarct.

 

Figure 2
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  		Figure 2. A 39-year-old man with a subacute lacunar infarct (white arrow) in the right corona radiata 3 days after onset. (a) Axial T2 weighted image. (b) Axial colour-coded directional image. (c) The lesion (yellow) in the axial colour-coded directional image. (d) Three-dimensional tractography superimposed on an axial colour-coded directional image (from an anteriosuperior viewpoint) . The corticospinal tract (orange lines) of the affected cerebral hemisphere appears to partly run through the lacunar infarct.

 

Figure 3
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  		Figure 3. A 58-year-old woman with an acute lacunar infarct (white arrows) in the posterior limb of the right internal capsule 14 hours after onset. (a) Axial T2 weighted image. (b) Axial colour-coded directional image. (c) Three-dimensional tractography superimposed on an axial isotropic diffusion-weighted image (from an anteriosuperior viewpoint). (d) Three-dimensional tractography superimposed on an axial colour-coded directional image (from an anteriosuperior viewpoint). The corticospinal tract (orange lines) of the affected cerebral hemisphere appears to run through the lacunar infarct.

 

Figure 4
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  		Figure 4. Group 3(yellow line) NIHSS scores at the time of the acute or subacute phase (<3 days), early chronic phase (8–14 days) and outcome (30–60 days) are significantly higher than those of Group 1 (black line) and Group 2 (red line). NIHSS scores of Group 1 were significantly lower than those of Group 2 at the acute phase or early subacute phase, and those of Group 2 were significantly lower than those of Group 3. NIHSS scores of Group 1 were significantly lower than those of Group 2 at outcome.

 




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