Abstract
Purpose: To detect lesion-related focal Wallerian degeneration (WD) changes in different segments of the corpus callosum (CC) in patients with large middle cerebral arterial (MCA) territory stroke using diffusion tensor imaging (DTI). Materials and Methods: Eight patients underwent DTI scans at three different time points: six to eight weeks, 10-12 weeks, and beyond six months of stroke onset. Eight healthy age-matched controls were also scanned using the same protocol at three different time points. Region-of-interest (ROI) analysis was performed on seven segments of the CC to determine the fractional anisotropy (FA), mean diffusivity (MD), and corresponding callosal cross-sectional areas. Results: On repeated-measures analysis of variance (ANOVA), a significant reduction in the FA values was observed from the first to the third study compared to controls, reflecting temporal degeneration in the rostrum, genu, rostral body, anterior midbody, and splenium of the CC. However, a significant temporal elevation in MD values was observed in only the rostral body and anterior midbody of the CC. This was associated with a significant region-specific reduction in the cross-sectional areas at time points beyond six months, and appears to be consistent with the loss of callosal structural components due to interruption of the cortico-callosal fibers secondary to WD. Conclusion: These results indicate that cortico-callosal topographical changes exhibit a significant temporal decline in observed FA values that is suggestive of cortico-callosal WD in patients with large MCA territory stroke.
| Original language | English |
|---|---|
| Pages (from-to) | 549-555 |
| Number of pages | 7 |
| Journal | Journal of Magnetic Resonance Imaging |
| Volume | 24 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Sep 2006 |
| Externally published | Yes |
Fingerprint
Keywords
- Corpus callosum
- Fractional anisotropy
- Middle cerebral artery
- Stroke
- Wallerian degeneration
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology
Cite this
Focal Wallerian degeneration of the corpus callosum in large middle cerebral artery stroke : Serial diffusion tensor imaging. / Gupta, Rakesh K.; Saksena, Sona; Hasan, Khader M.; Agarwal, Atul; Haris, Mohammad; Pandey, Chandra M.; Narayana, Ponnada A.
In: Journal of Magnetic Resonance Imaging, Vol. 24, No. 3, 09.2006, p. 549-555.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Focal Wallerian degeneration of the corpus callosum in large middle cerebral artery stroke
T2 - Serial diffusion tensor imaging
AU - Gupta, Rakesh K.
AU - Saksena, Sona
AU - Hasan, Khader M.
AU - Agarwal, Atul
AU - Haris, Mohammad
AU - Pandey, Chandra M.
AU - Narayana, Ponnada A.
PY - 2006/9
Y1 - 2006/9
N2 - Purpose: To detect lesion-related focal Wallerian degeneration (WD) changes in different segments of the corpus callosum (CC) in patients with large middle cerebral arterial (MCA) territory stroke using diffusion tensor imaging (DTI). Materials and Methods: Eight patients underwent DTI scans at three different time points: six to eight weeks, 10-12 weeks, and beyond six months of stroke onset. Eight healthy age-matched controls were also scanned using the same protocol at three different time points. Region-of-interest (ROI) analysis was performed on seven segments of the CC to determine the fractional anisotropy (FA), mean diffusivity (MD), and corresponding callosal cross-sectional areas. Results: On repeated-measures analysis of variance (ANOVA), a significant reduction in the FA values was observed from the first to the third study compared to controls, reflecting temporal degeneration in the rostrum, genu, rostral body, anterior midbody, and splenium of the CC. However, a significant temporal elevation in MD values was observed in only the rostral body and anterior midbody of the CC. This was associated with a significant region-specific reduction in the cross-sectional areas at time points beyond six months, and appears to be consistent with the loss of callosal structural components due to interruption of the cortico-callosal fibers secondary to WD. Conclusion: These results indicate that cortico-callosal topographical changes exhibit a significant temporal decline in observed FA values that is suggestive of cortico-callosal WD in patients with large MCA territory stroke.
AB - Purpose: To detect lesion-related focal Wallerian degeneration (WD) changes in different segments of the corpus callosum (CC) in patients with large middle cerebral arterial (MCA) territory stroke using diffusion tensor imaging (DTI). Materials and Methods: Eight patients underwent DTI scans at three different time points: six to eight weeks, 10-12 weeks, and beyond six months of stroke onset. Eight healthy age-matched controls were also scanned using the same protocol at three different time points. Region-of-interest (ROI) analysis was performed on seven segments of the CC to determine the fractional anisotropy (FA), mean diffusivity (MD), and corresponding callosal cross-sectional areas. Results: On repeated-measures analysis of variance (ANOVA), a significant reduction in the FA values was observed from the first to the third study compared to controls, reflecting temporal degeneration in the rostrum, genu, rostral body, anterior midbody, and splenium of the CC. However, a significant temporal elevation in MD values was observed in only the rostral body and anterior midbody of the CC. This was associated with a significant region-specific reduction in the cross-sectional areas at time points beyond six months, and appears to be consistent with the loss of callosal structural components due to interruption of the cortico-callosal fibers secondary to WD. Conclusion: These results indicate that cortico-callosal topographical changes exhibit a significant temporal decline in observed FA values that is suggestive of cortico-callosal WD in patients with large MCA territory stroke.
KW - Corpus callosum
KW - Fractional anisotropy
KW - Middle cerebral artery
KW - Stroke
KW - Wallerian degeneration
UR - http://www.scopus.com/inward/record.url?scp=33748255300&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33748255300&partnerID=8YFLogxK
U2 - 10.1002/jmri.20677
DO - 10.1002/jmri.20677
M3 - Article
C2 - 16888796
AN - SCOPUS:33748255300
VL - 24
SP - 549
EP - 555
JO - Journal of Magnetic Resonance Imaging
JF - Journal of Magnetic Resonance Imaging
SN - 1053-1807
IS - 3
ER -