胎儿超声平面成像:前景与挑战。

Q2 Medicine
Onur Afacan, Judy A Estroff, Edward Yang, Carol E Barnewolt, Susan A Connolly, Richard B Parad, Robert V Mulkern, Simon K Warfield, Ali Gholipour
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引用次数: 0

摘要

胎儿磁共振成像(MRI)在临床放射学和研究中越来越引起人们的兴趣。回声平面成像(EPI)提供了一种独特的潜力,因为它可以用于快速获取图像。它可以用于冻结运动,或获得具有各种对比机制的多张图像,从而研究胎儿大脑和身体器官的微观结构和功能。在本文中,我们讨论了目前胎儿EPI的临床和研究应用。这包括T2*加权成像,以更好地识别血液制品和血管,使用扩散加权MRI研究发育中大脑的连接,以及使用功能性MRI(fMRI)来识别发展中大脑的功能网络。当带状或驻波伪影对结构胎儿MRI中常规使用的主流序列产生不利影响时,EPI也可以用作替代结构序列。我们还讨论了EPI收购的挑战以及潜在的解决方案。由于EPI采集固有地对易感伪影敏感,几何失真限制了高分辨率EPI采集的使用。此外,片间运动以及发射和接收场的不均匀性可能在胎儿EPI中产生显著的伪影。最后,我们讨论了有希望的研究方向,以克服这些挑战,提高EPI在临床和研究应用中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fetal Echoplanar Imaging: Promises and Challenges.

Fetal magnetic resonance imaging (MRI) has been gaining increasing interest in both clinical radiology and research. Echoplanar imaging (EPI) offers a unique potential, as it can be used to acquire images very fast. It can be used to freeze motion, or to get multiple images with various contrast mechanisms that allow studying the microstructure and function of the fetal brain and body organs. In this article, we discuss the current clinical and research applications of fetal EPI. This includes T2*-weighted imaging to better identify blood products and vessels, using diffusion-weighted MRI to investigate connections of the developing brain and using functional MRI (fMRI) to identify the functional networks of the developing brain. EPI can also be used as an alternative structural sequence when banding or standing wave artifacts adversely affect the mainstream sequences used routinely in structural fetal MRI. We also discuss the challenges with EPI acquisitions, and potential solutions. As EPI acquisitions are inherently sensitive to susceptibility artifacts, geometric distortions limit the use of high-resolution EPI acquisitions. Also, interslice motion and transmit and receive field inhomogeneities may create significant artifacts in fetal EPI. We conclude by discussing promising research directions to overcome these challenges to improve the use of EPI in clinical and research applications.

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来源期刊
Topics in Magnetic Resonance Imaging
Topics in Magnetic Resonance Imaging Medicine-Medicine (all)
CiteScore
5.50
自引率
0.00%
发文量
24
期刊介绍: Topics in Magnetic Resonance Imaging is a leading information resource for professionals in the MRI community. This publication supplies authoritative, up-to-the-minute coverage of technical advances in this evolving field as well as practical, hands-on guidance from leading experts. Six times a year, TMRI focuses on a single timely topic of interest to radiologists. These topical issues present a variety of perspectives from top radiological authorities to provide an in-depth understanding of how MRI is being used in each area.
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