Title :
The mean intensity ofo activation than the number of activated voxels is a better index to reflect the levels of visuospatial performance
Author :
Chung, S.C. ; You, J.H. ; Tack, G.R. ; Yi, J.H. ; Lee, Bang-Wook
Author_Institution :
Dept. of Biomed. Eng., Kon-Kuk Univ., Seoul
Abstract :
This study is to identify the more sensitive method to measure the brain activation by the visuospatial performance level by comparing two different methods of measurement (i.e., a method calculating the number of activated voxels and the other, the mean intensity of activated voxels). Sixteen right-handed male college students (mean age 23.2 years) participated in this study and functional brain images were scanned with a 3T MRI using the single-shot EPI method during visuospatial performance. There found no brain areas with correlation between the visuospatial performance level and number of activated voxels. However, there found a significant correlation between the visuospatial performance level and the mean intensity of selected activated voxels in the parietal, frontal, and other areas. In conclusion, the method of mean intensity rather than the one of the number is considered as a better index
Keywords :
biomedical MRI; brain; 3T MRI; activated voxels; brain activation; mean intensity; single-shot EPI method; visuospatial performance; Band pass filters; Educational institutions; Filtering theory; Frequency; Gabor filters; Gaussian processes; Image analysis; Image texture; Low pass filters; Veins; Mean intensity; number of activated voxel; visuospatial performance;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1615676
