【摘 要】
：
Background It is known that the brain structure changes with normal aging. The objective of this study was to quantify the anisotropy and average diffusion coef
【机 构】
：
Department of Radiology
论文部分内容阅读
Background It is known that the brain structure changes with normal aging. The objective of this study was to quantify the anisotropy and average diffusion coefficient (DCavg) of the brain in normal adults to demonstrate the microstructure changes of brain with aging.Methods One hundred and six normal adults were examined with diffusion tensor imaging (DTI). The fractional anisotropy (FA), 1-volume ratio (1-VR), relative anisotropy (RA) and average diffusion coefficient (DCavg) of different anatomic sites of brain were measured, correlated with age and compared among three broad age groups.Results Except in lentiform nucleus, the anisotropy increased and DCavg decreased with aging. Both anisotropy and DCavg of lentiform nucleus increased with aging. The normal reference values of DTI parameters of normal Chinese adult in major anatomic sites were acquired. Conclusions DTI data obtained noninvasively can reflect the microstructural changes with aging. The normal reference values acquired can serve as reference standards in differentiation of brain white matter diseases.
其他文献
Several signals influence dendritic cell (DC) functions and consequent the immune responses to infectious pathogens. Our recent findings provide a new model of
Although it has been known that y8 T cells may play an important role in the immune response to infection of Mycobacterium tuberculosis (M. tb), the mechanisms
To make the on-board computer system more dependable and real-time in a satellite, an algorithm of the fault-tolerant scheduling in the on-board computer system
In order to screen potential mRNA locations of P gene in which targeting siRNAs can effectively inhibit HBV expression, 5 recombinant plasmids containing 4 targ
Objective:To study the effect of the Chinese medicine Qiangxin Fumai Granule (强心复脉颗粒,QFG) on electrophysiological functions of the sinoatrial node during
AIM: To present a case of acute mesenteric and portal vein thrombosis treated with thrombolytic therapy in a patient with ulcerative colitis in acute phase and
Objective:The Chinese Quality of Life Instrument (ChQOL) was developed as a valid generic health status instrument based on the well-established theory of healt
Pre-pubertal periodontitis (PPP) is a rare and rapidly progressive form of early onset periodontitis resulting in premature tooth loss of primary and permanent
AIM: To evaluate the feasibility of a new clinical rating scale for a standardized assessment of cirrhosis-associated neuro-psychiatric symptoms.METHODS: Forty
Interleukin (IL)-8 is a potent neutrophil chemotactic factor and a crucial mediator in neutrophil-dependent inflammation.Various cell types produce IL-8, either