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南京医科大学学报(自然科学版) 第45卷第3期
·360 · Journal of Nanjing Medical University(Natural Sciences) 2025年3月
·临床研究·
基于胎盘体素内不相干运动MRI和胎儿脑体积预测生长受限胎
儿中的极低出生体重儿
孔令男 ,黄世杰 ,张 璇 ,季亮宇 ,周 欣 ,吴飞云 ,赵 萌 1*
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南京医科大学第一附属医院放射科,江苏 南京 210029:上海科技大学生物医学工程学院,先进医疗材料和设备国家重点
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实验室,上海 201210;南京医科大学第一附属医院产科,江苏 南京 210029
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[摘 要] 目的:探讨胎盘体素内不相干运动(intravoxel incoherent motion,IVIM)MRI 参数和胎儿脑体积对FGR 中VLBWI 的
预测价值。方法:回顾性纳入 23 例 FGR 孕妇,依据胎儿出生体重分为 VLBWI 组(8 例)和非极低出生体重儿(non⁃VLBWI)组
(15例)。比较两组胎儿侧脑室占颅内体积百分比以及胎盘IVIM参数[真扩散系数(D)、伪扩散系数(D )、血流灌注分数(f)及
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胎盘面积]。采用受试者工作特征(receiver operating characteristic,ROC)曲线分析各参数对VLBWI的预测效能。结果:VLBWI
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组胎盘D值小于non⁃VLBWI组[(1.38±0.04)×10 mm /s vs.(1.44±0.07)×10 mm /s,t=-2.109,P=0.047],胎盘面积小于non⁃VLBWI
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组[(155.84±34.69)cm vs.(200.41±47.95)cm ,t=-2.315,P=0.031],胎儿侧脑室占颅内体积百分比大于 non⁃VLBWI 组[(3.00±
0.55)% vs.(2.53±0.33)%,t=2.591,P=0.017]。胎盘 D 值、胎盘面积和侧脑室占颅内体积百分比的 ROC 曲线下面积分别为
0.767、0.783和0.792。联合胎儿侧脑室占颅内体积百分比、胎盘D值和胎盘面积可将ROC曲线下面积提高至0.892。结论:胎
盘IVIM参数和胎儿脑体积可能是帮助预测FGR中VLBWI的潜在有效影像标志物。
[关键词] 胎儿生长受限;极低出生体重儿;胎儿脑体积;体素内不相干运动
[中图分类号] R445.2 [文献标志码] A [文章编号] 1007⁃4368(2025)03⁃360⁃07
doi:10.7655/NYDXBNSN241029
Prediction of very low birth weight infants in growth ⁃ restricted fetuses using intravoxel
incoherent motion MRI of the placenta and fetal brain volume
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KONG Lingnan ,HUANG Shijie ,ZHANG Xuan ,JI Liangyu ,ZHOU Xin ,WU Feiyun ,ZHAO Meng 1*
1 Department of Radiology,the First Affiliated Hospital of Nanjing Medical University,Nanjing 210029;School of
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Biomedical Engineering & State Key Laboratory of Advanced Medical Materials and Devices,Shanghai Tech
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University,Shanghai 201210;Department of Obstetrics,the First Affiliated Hospital of Nanjing Medical University,
Nanjing 210029,China
[Abstract] Objective:To evaluate the predictive value of placental intravoxel incoherent motion(IVIM)MRI parameters and fetal
brain volume in predicting VLBWI in FGR. Methods:A retrospective analysis was conducted on 23 pregnant women with FGR,
categorized into VLBWI group(n=8)and non ⁃ VLBWI group(n=15)based on birth weight. We compared brain structures as a
percentage of intracranial volume and placental IVIM parameters[true diffusion coefficient(D),pseudo⁃diffusion coefficient(D ),
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perfusion fraction(f),and placental area]between the two groups. Receiver operating characteristic(ROC)curve analysis was used to
assess the predictive efficacy of each parameter for VLBWI. Results:The placental D value in the VLBWI group was lower than that in
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the non⁃VLBWI group[(1.38±0.04)×10 mm /s vs.(1.44±0.07)×10 mm /s,t=-2.109,P=0.047],and the placental area was smaller
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in the VLBWI group[(155.84 ± 34.69)cm vs.(200.41 ± 47.95)cm ,t=-2.315,P=0.031],while the percentage of lateral ventricle
volume relative to intracranial volume was greater in the VLBWI group[(3.00 ± 0.55)% vs.(2.53 ± 0.33)%,t=2.591,P=0.017]. The
areas under the ROC curve for placental D value,placental area,and lateral ventricle as a percentage of intracranial volume were
0.767,0.783,and 0.792,respectively. Combining the fetal lateral ventricle as a percentage of intracranial volume,placental D value,
[基金项目] 江苏省科教能力提升工程(JSDW202243)
通信作者(Corresponding author),E⁃mail:zm18901582106@126.com(ORCID:0009⁃0007⁃4710⁃3954)
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