Study of signal variation on diffusion-weighted MRI of cerebral cortices in healthy adults

ZHU Jian-zhong; ZHAO Lei; QIN Jian; CHENG Yu-hui; LIU Jun-jie

Journal of China Clinic Medical Imaging ›› 2010, Vol. 21 ›› Issue (3) : 164-167.

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Study of signal variation on diffusion-weighted MRI of cerebral cortices in healthy adults

ZHU Jian-zhong1, ZHAO Lei1, QIN Jian2, CHENG Yu-hui1, LIU Jun-jie2

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Abstract

Objective: To determine whether there is regional signal variation in the brain cortices of neurologically healthy adults on DW-MR images. Materials and Methods: The signal intensity(SI) on DW-MR images, contrast-to-noise ratios(CNR), and apparent diffusion coefficient(ADC) maps of the cerebral cortices at Signa HDe 1.5T were evaluated in 47 neurologically healthy subjects(27 men, 20 women, age range 31~82 years). Results: Increased SI on DW-MR images was seen in the cingulate gyrus and insula regardless of patient age. There were no statistically significant gender-or laterality-related differences(P>0.05). There was statistically significant differences existed in CNR among the cortical regions(P<0.001), and the signal intensity was higher in the cingulate gyrus and insula than in the other cortices(P<0.01). There were no apparent ADC differences among the cortices on ADC maps in males and females(P>0.05). Conclusion: The signal of brain cortices in the cingulate gyrus and insula was observed on DW-MR images of healthy subjects, and frequently manifest high SI. These findings may help in the recognition of cortical signal abnormalities as visualized on DW-MR images.

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Brain / Diffusion magnetic resonance imaging

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ZHU Jian-zhong;ZHAO Lei;QIN Jian;CHENG Yu-hui;LIU Jun-jie. Study of signal variation on diffusion-weighted MRI of cerebral cortices in healthy adults[J]. Journal of China Clinic Medical Imaging. 2010, 21(3): 164-167