Images: LEFT: Monitoring of treatment of GBM in the brainstem treated with ECCT using ECVT in conjunction with MR; While MRI images showed significant tumor shrinkage in the size in the first 1.5 year, and relatively no change afterward, the electrical activity of the brain taken by ECVT showed remarkable change from relatively low activity, then increased dramatically during the first month of the treatment and then decreased gradually back to normal. The electrical activity indicates a process of inflammation in the tumor area may be caused by the process of cancer destruction due to the treatment which extremely important to monitor especiall as the to tumor is in the crucial area of the brainstem; RIGHT: Brain ECVT scan of the cortical electrical activity map shows disappearing low activity area caused by the tumor with the progress of the treatment; The electrical activity of the brain becomes normal with the treatment progress.