Article (Scientific journals)
White Matter Changes in Comatose Survivors of Anoxic Ischemic Encephalopathy and Traumatic Brain Injury: Comparative Diffusion-Tensor Imaging Study
Van Der Eerden, Anke; Khalilzadeh, Omid; Perlbarg, Vincent et al.
2014In Radiology, 270
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Abstract :
[en] Purpose:To analyze white matter pathologic abnormalities by using diffusion-tensor (DT) imaging in a multicenter prospective cohort of comatose patients following cardiac arrest or traumatic brain injury (TBI). Materials and Methods: Institutional review board approval and informed consent from proxies and control subjects were obtained. DT imaging was performed 5–57 days after insult in 49 cardiac arrest and 40 TBI patients. To control for DT imaging–processing variability, patients’ values were normalized to those of 111 control subjects. Automated segmentation software calculated normalized axial diffusivity (λ1) and radial diffusivity (λ) in 19 predefined white matter regions of interest (ROIs). DT imaging variables were compared by using general linear modeling, and side-to-side Pearson correlation coefficients were calculated. P values were corrected for multiple testing (Bonferroni). Results:In central white matter, λ1 differed from that in control subjects in six of seven TBI ROIs and five of seven cardiac arrest ROIs (all P < .01). The λ differed from that in control subjects in all ROIs in both patient groups (P < .01). In hemispheres, λ1 was decreased compared with that in control subjects in three of 12 TBI ROIs (P < .05) and nine of 12 cardiac arrest ROIs (P < .01). The λ was increased in all TBI ROIs (P < .01) and in seven of 12 cardiac arrest ROIs (P < .05). Cerebral hemisphere λ1 was lower in cardiac arrest than in TBI in six of 12 ROIs (P < .01), while λ was higher in TBI than in cardiac arrest in eight of 12 ROIs (P < .01). Diffusivity values were symmetrically distributed in cardiac arrest (P < .001 for side-to-side correlation) but not in TBI patients. Conclusion:DT imaging findings are consistent with the known predominance of cerebral hemisphere axonal injury in cardiac arrest and chiefly central myelin injury in TBI. This consistency supports the validity of DT imaging for differentiating axon and myelin damage in vivo in humans.
Research center :
GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège
Disciplines :
Neurology
Author, co-author :
Van Der Eerden, Anke
Khalilzadeh, Omid
Perlbarg, Vincent
Dinkel, Julien
Sanchez, Paola
Vos, Pieter
Luyt, Charles-Edouard
Stevens, Robert
Menjot de Champfleur, Nicolas
Delmaire, Christine
Tollard, Eleonore
Gupta, Rajiv
Dormont, Didier
Laureys, Steven  ;  Université de Liège - ULiège > Centre de recherches du cyclotron
Benali, Habib
VANHAUDENHUYSE, Audrey  ;  Centre Hospitalier Universitaire de Liège - CHU > Algologie - soins palliatifs
Galanaud, Damien
Puybasset, Louis
More authors (8 more) Less
Language :
English
Title :
White Matter Changes in Comatose Survivors of Anoxic Ischemic Encephalopathy and Traumatic Brain Injury: Comparative Diffusion-Tensor Imaging Study
Publication date :
February 2014
Journal title :
Radiology
ISSN :
0033-8419
eISSN :
1527-1315
Publisher :
Radiological Society of North America, Easton, United States - Pennsylvania
Volume :
270
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 February 2014

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