Functional Imaging of Cerebral Cortex Activation with a 1.5-T IVIR Imaging System.
10.3348/jkrs.1995.33.1.1
- Author:
Hyung Jin KIM
;
Sung Hoon CHUNG
;
Sun Ae CHANG
;
Jae Hyoung KIM
;
Choong Kun HA
;
Eun Sang KIM
- Publication Type:Original Article
- MeSH:
Cerebral Cortex*;
Echo-Planar Imaging;
Fingers;
Healthy Volunteers;
Motor Cortex;
Neurosciences;
Photic Stimulation;
Visual Cortex
- From:Journal of the Korean Radiological Society
1995;33(1):1-6
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: Most of recent MR imagings of cerebral cortex activation have been performed by using high field magnet above 2-T or echo-planar imaging technique. We report our experience on imaging of cerebral cortex activation with a widely available standard 1.5-T MR. MATERIALS AND METHODS: Series of gradient-echo images (TR/TE/flip angle :80/60/40 degrees64 x 128 matrix) were acquired alternatively during the periods of rest and task in five normal volunteers. Finger movement (n=10 ;5 right, 5 left) and flashing photic stimulation (n=l) were used as a motor task and a visual task to activate the motor cortex and visual cortex, respectively. Activation images were obtained by subtracting sum of rest images from that of task images. Changes of signal intensity were analyzed over the periods of rest and task. RESULTS: Activation images were obtained in all cases. Changes of signal intensity between rest and task periods were 6.5-14.6%(mean, 10.5%) in the motor cortex and 4.2% in the visual cortex. CONCLUSION: Functional imaging of cerebral cortex activation could be performed with a widely available 1.5-T MR. Widespread applications of this technique to basic and clinical neuroscience are expected.
