Applicability of automated tractography during acute care stroke rehabilitation.
Midori Mochizuki, Yuki Uchiyama, Kazuhisa Domen and 1 others
PMID 36744203WHAT IT FOUND
Automated tractography in three acute stroke cases showed disrupted or blurred motor and language pathways in cases with hemiparesis or aphasia, and intact pathways in one case without those symptoms.
It did not test whether this changed recovery.
Key findings
01Automated tractography showed clearly traced corticospinal and arcuate fasciculus images in the case without motor or language symptoms, and disrupted or blurred images in the cases with hemiparesis or aphasia.
02Detailed language testing found word repetition and writing problems in the case with aphasia and hemiparesis, and writing and calculation problems in the case with aphasia only.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for SLPs
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What it does not show
Only selected cases were described, with no comparison group and no measured treatment outcomes. Patients also received medication and physical, occupational, and speech therapy, so the contribution of tractography alone cannot be separated. Tractography results depend on parameter settings, and tract volume can be misleading when waytotal is very low. Only the corticospinal tract and arcuate fasciculus were analyzed, not other tracts linked to aphasia. The automated pipeline took many hours per patient and did not use graphics processing unit acceleration. The authors' claim that the technique is clinically useful comes from experience, not tested outcomes.
Declared interests
This work was supported by Japan Society for the Promotion of Science grants, and the authors declare no conflicts of interest.
The easy way to misread this
Do not read this as proof that automated tractography improves stroke recovery. It describes selected cases with no comparison group or outcome measurements, and the patients also received medication and physical, occupational, and speech therapy, so any effect of the imaging alone cannot be separated.