BACKGROUND The incidence of PAS disorders increased rapidly in recent years, and introvoxel incoherent motion (IVIM) MRI has been applied in the assessment of placenta. The study aims to investigate whether the parameters from IVIM can be used to differentiate patients with PAS disorders complicating placenta previa and secondly to differentiate different categories of PAS disorders. METHODS The study participants were comprised of 99 patients with placenta previa, including 16 patients with placenta accreta, 51 patients with increta, 8 patients with percreta and 24 patients without PAS disorders between 28 + 0 and 39 + 6 weeks. IVIM MRI was performed on a 1.5 T scanner. Perfusion fraction (f), pseudodiffusion coefficient (D*) and diffusion coefficient (D) were calculated. RESULTS Women with PAS disorders had a higher perfusion fraction (p = 0.019) than women without the disease. Multiple comparisons showed perfusion fraction in patients without PAS disorders was significantly lower than in patients with placenta accreta and percreta(P = 0.018 and 0.033 respectively), but was not lower than in patients with increta(p = 1). CONCLUSION Patients with placenta accreta and percreta differed in placental perfusion fraction from women with increta and without PAS disorders.

中文翻译：

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是否可以使用Introvoxel非相干运动MRI来区分胎盘增生频谱障碍的患者？

背景技术近年来，PAS疾病的发病率迅速增加，并且肌内不相干运动（IVIM）MRI已用于评估胎盘。这项研究旨在调查IVIM的参数是否可用于区分伴有前置胎盘的PAS疾病患者，其次可用于区分不同类别的PAS疾病。方法：研究参与者包括99例前置尿道的患者，包括16例增生胎盘，51例crecre，8例percreta和24例在28 + 0至39 + 6周内无PAS疾病的患者。IVIM MRI在1.5 T扫描仪上进行。计算灌注分数（f），假扩散系数（D *）和扩散系数（D）。结果患有PAS疾病的女性的灌注分数更高（p = 0。019）比没有疾病的女性。多重比较显示，无PAS障碍的患者的灌注分数显着低于有胎盘积生和排泄的患者（分别为P = 0.018和0.033），但不低于有增生的患者（p = 1）。结论胎盘增生和排泄患者的胎盘灌注分数与有增量和无PAS疾病的女性不同。