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AJNR - American Journal of Neuroradiology

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Whole-Brain Apparent Diffusion Coefficient in Traumatic Brain Injury: Correlation with Glasgow Coma Scale Score

Kathirkamanathan Shanmuganathan^a,b, Rao P. Gullapalli^a, Stuart E. Mirvis^a,b, Steven Roys^a and Prasad Murthy^a

^a Department of Diagnostic Radiology, University of Maryland Medical Center, Baltimore
^b Maryland Shock-Trauma Center, University of Maryland Medical Center, Baltimore

View larger version (73K): [in a new window]   FIG 1. Brain stem contusion in a 26-year-old man admitted after blunt-force trauma. Axial images show bilateral brain stem (curved arrows) and medial temporal (straight arrows) contusions in the brain parenchyma. A, T2-weighted image. B, FLAIR image.

View larger version (87K): [in a new window]   FIG 2. Minimal parenchymal contusions in a 36- year-old patient admitted after a head injury. Axial images show intraparenchymal contusions (arrows) in the right frontal lobe. A, T2-weighted image. B, FLAIR image. C, DW image.

View larger version (24K): [in a new window]   FIG 3. Comparison of normal whole-brain ADC histograms with histograms in patients with normal MR findings but a low GCS score (group A).

View larger version (24K): [in a new window]   FIG 4. Comparison of normal whole-brain ADC histograms with histograms in patients with brain-stem injuries and a low GCS score (group B).

View larger version (24K): [in a new window]   FIG 5. Comparison of normal whole-brain ADC histograms with histograms in patients with minimal brain injury and a normal GCS score (group C).

View larger version (24K): [in a new window]   FIG 6. Comparison of normal whole-brain ADC histograms with histograms in patients with minimal brain injury and a low GCS score (group D).

View larger version (33K): [in a new window]   FIG 7. Average ADCs of all control subjects and patients. SD of the mean ADC increases with increasing mean ADC, suggesting a heterogeneous distribution of ADC values in the injured brain.

View larger version (30K): [in a new window]   FIG 8. Peak ADCs of control subjects and patients and their associated SDs.