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《Chinese Journal of Medical Imaging Technology》 2005-01
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DTI and Tractography study on language areas of a patient with primary progressive aphasia

SUN Xue jin 1, DAI Jian ping 1* , CHEN Hong yan 1, AI Lin 1, TIAN Sheng yong 1, ZHANG Yu mei 2, PANG Rui lin 3, ZHANG Xun 4(1. Department of Neuroradiology, 2.Department of Neurology, the Affiliated Beijing Tiantan Hospital of Capital University of Medical Sciences, Beijing Neurosurgical Institute, Beijing 100050, China; 3.Department of Medical Imaging, the First Affiliated Hospital of Kunming Medical College, Kunming 650032, China; 4.Department of MRI, SIEMENS Medical, Beijing 100120, China)  
Objective To exhibit the fibers of language areas, and to demonstrate fiber changes of the primary progressive aphasia with diffusion tensor imaging and fiber tracking technique. Methods Conventional MRI, diffusion tensor imaging (DTI) and fiber tracking were performed in a 56 year old man with primary progressive aphasia by 3.0 T SIEMENS Trio 2003T MRI. FA values in language areas, including Broca's and Wernicke's areas, and contralateral normal areas were measured as seeds to track fibers. DTI method depicted the fibers in left Broca area and Wernicke area. Results Conventional MRI demonstrated mild atrophy of left temporal lobe and frontal lobe. The fasciculus between left Broca area and other areas decreased. There were no fiber connections between triangle and Wernicke's area, and fibers through arcuate fasciculus to opercula of frontal lobe decreased, too. Mean FA and neural fasciculi in Broca area and Wernicke area also decreased than those in healthy subjects. Conclusion The fibers between Wernicke area and other areas decreased. The fasciculi between cerebral language area and other areas are the basic structure of language function, especially the arcuate fasciculi are the most important structure between Broca and Wernicke's areas.
【CateGory Index】: R445.2
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