Application of apparent diffusion coefficient in children aged 2-12 years with intellectual disability/global developmental delay who have normal conventional brain MRI findings
LI Lin1, ZHAO Jian-She1, GAO Zai-Fen2, MA Chang-You1, DONG Chun-Hua1, ZHANG Hong-Wei2
Center of Medical Imaging, Qilu Children's Hospital of Shandong University, Jinan 250022, China
Abstract Objective To study the value of fast spin-echo diffusion weighted imaging (TSE-DWI) apparent diffusion coefficient (ADC) in children aged 2-12 years with intellectual disability (ID)/global developmental delay (GDD) who have normal conventional brain MRI findings. Methods A total of 578 children with normal conventional brain MRI findings who met the diagnostic criteria for ID/GDD and 375 normal children were enrolled. Their imaging and clinical data were collected. All children underwent scanning with brain TSE-DWI sequence and routine sequence. ADC values of each brain region were compared between normal children with different ages, as well as between children with different degrees of ID/GDD in each age group. The influence of Adaptive Behavior Assessment System-Ⅱ (ABAS-Ⅱ) score on ADC values of each brain region was analyzed. Results For the normal children, the ADC values of the frontal and temporal white matter, the corpus callosum, the inner capsule, the centrum semiovale, the cerebellar dentate nucleus, the optic radiation, the thalamus, the lenticular nucleus, and the caudate nucleus gradually decreased with age (P < 0.05). ADC values of the deep white matter, the shallow white matter, the deep gray matter nuclei, and the shallow gray matter increased with the increase in the degree of ID/GDD in the ID/GDD children aged 4-6 years (P < 0.05). In the children with ID/GDD, the ADC values of the deep white matter, the shallow white matter, and the deep gray matter nuclei decreased with age (P < 0.05). The ADC values of the children with ID/GDD decreased with the increase in ABAS-Ⅱ score (P < 0.05). Conclusions ADC can reflect the subtle structural changes of brain regions in children with ID/GDD who have normal conventional brain MRI findings. It may be associated with social adaptation. It can provide an objective basis for the quantitative diagnosis of ID/GDD in children.
LI Lin,ZHAO Jian-She,GAO Zai-Fen et al. Application of apparent diffusion coefficient in children aged 2-12 years with intellectual disability/global developmental delay who have normal conventional brain MRI findings[J]. CJCP, 2019, 21(6): 541-546.
LI Lin,ZHAO Jian-She,GAO Zai-Fen et al. Application of apparent diffusion coefficient in children aged 2-12 years with intellectual disability/global developmental delay who have normal conventional brain MRI findings[J]. CJCP, 2019, 21(6): 541-546.
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