Lee Yoonhee, Yoon Sungjin, Park So Hyun, Nickel Marcel Dominik
J Korean Soc Radiol. 2024 Mar;85(2):345-362. doi: 10.3348/jksr.2023.0067. Epub 2024 Mar 26.
MRI plays an important role in abdominal imaging because of its ability to detect and characterize focal lesions. However, MRI examinations have several challenges, such as comparatively long scan times and motion management through breath-holding maneuvers. Techniques for reducing scan time with acceptable image quality, such as parallel imaging, compressed sensing, and cutting-edge deep learning techniques, have been developed to enable problem-solving strategies. Additionally, free-breathing techniques for dynamic contrast-enhanced imaging, such as extra-dimensional-volumetric interpolated breath-hold examination, golden-angle radial sparse parallel, and liver acceleration volume acquisition Star, can help patients with severe dyspnea or those under sedation to undergo abdominal MRI. We aimed to present various advanced abdominal MRI techniques for reducing the scan time while maintaining image quality and free-breathing techniques for dynamic imaging and illustrate cases using the techniques mentioned above. A review of these advanced techniques can assist in the appropriate interpretation of sequences.
由于MRI能够检测和表征局灶性病变，因此在腹部成像中发挥着重要作用。然而，MRI检查面临一些挑战，比如扫描时间相对较长，以及通过屏气操作进行运动管理。为了实现问题解决策略，已经开发出了一些在可接受的图像质量下减少扫描时间的技术，如并行成像、压缩感知和前沿的深度学习技术。此外，用于动态对比增强成像的自由呼吸技术，如超维度容积内插屏气检查、黄金角径向稀疏并行采集和肝脏加速容积采集Star技术，可以帮助严重呼吸困难的患者或接受镇静的患者进行腹部MRI检查。我们旨在介绍各种在保持图像质量的同时减少扫描时间的先进腹部MRI技术，以及用于动态成像的自由呼吸技术，并举例说明使用上述技术的病例。对这些先进技术的综述有助于对序列进行恰当解读。
