Pugash Denise, Brugger Peter C, Bettelheim Dieter, Prayer Daniela
Department of Radiology, University of British Columbia, Vancouver, Canada.
Eur J Radiol. 2008 Nov;68(2):214-26. doi: 10.1016/j.ejrad.2008.06.031. Epub 2008 Sep 14.
Fetal MRI is used with increasing frequency as an adjunct to ultrasound (US) in prenatal diagnosis. In this review, we discuss the relative value of both prenatal US and MRI in evaluating fetal and extra-fetal structures for a variety of clinical indications. Advantages and disadvantages of each imaging modality are addressed. In summary, MRI has advantages in demonstrating pathology of the brain, lungs, complex syndromes, and conditions associated with reduction of amniotic fluid. At present, US is the imaging method of choice during the first trimester, and in the diagnosis of cardiovascular abnormalities, as well as for screening. In some conditions, such as late gestational age, increased maternal body mass index, skeletal dysplasia, and metabolic disease, neither imaging method may provide sufficient diagnostic information.
胎儿磁共振成像（MRI）作为超声（US）的辅助手段在产前诊断中的应用频率日益增加。在本综述中，我们讨论了产前超声和磁共振成像在评估胎儿及胎儿外结构以应对各种临床指征方面的相对价值。阐述了每种成像方式的优缺点。总之，磁共振成像在显示脑、肺病变、复杂综合征以及与羊水减少相关的病症方面具有优势。目前，超声是孕早期、心血管异常诊断以及筛查的首选成像方法。在某些情况下，如孕晚期、孕妇体重指数增加、骨骼发育不良和代谢性疾病，两种成像方法可能都无法提供足够的诊断信息。
