These images show the LI of the 15O-PET and MEG images of the 37 patients, showing CBF (a), OEF (b), 0.3- to 4-Hz waves (c), and 4- to 8-Hz waves (d). The averages of the LI are encoded with color (values are shown in the color bars). The images were anatomically standardized by SPM. CBF values are decreased and OEF values are increased in the affected hemisphere. Both 0.3- to 4-Hz and 4- to 8-Hz MEG waves are distributed in the affected hemisphere, predominantly from the posterior temporal to parietal regions. AH: affected hemisphere, nAH: non-affected hemisphere.
Bar graphs showing the LI of 15O-PET and MEG.
The 15O-PET results showed statistically significant lateralities in CBF and OEF in the ROIs of the ACA, MCAa, and MCAp (a). The MEG results showed statistically significant lateralities for 4- to 8-Hz waves in the MCAa, and for 0.3- to 4-Hz and 4- to 8-Hz waves in the MCAp (b). Data are expressed as the mean ± standard error of the mean (n = 37). Significant laterality was determined with the 95% CI with the Bootstrap method [35]. (*: Range of 95% CI represents a positive value.)
Quantitatively imaged spontaneous neuromagnetic fields using the automated ROI setting enabled clear depiction of cerebral ischemic areas. Frequency analysis may reveal unique neural activity that is distributed in the impaired vascular metabolic territory, in which the cerebral infarction has not yet been completed.
No comments:
Post a Comment