心脏MRI中的工件:成像外观和解决方案
Prabhakar Shantha Rajiah1, Baskaran Sundaram1, Ming Yen Ng1
1From the Department of Radiology, Cardiovascular Imaging, Mayo Clinic, 200 1st St SW, Rochester, MN 559905 (P.S.R., P.A.A.); Department of Radiology, Division of Cardiothoracic Imaging, Jefferson University Hospitals, Philadelphia, Pa (B.S.); Department of Radiology, Baylor Health System, Dallas, Tex (P.R.); Department of Diagnostic Radiology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR (M.Y.N.); and Department of Diagnostic Radiology, Cleveland Clinic, Cleveland, Ohio (M.A.B.).
识别和减轻心脏MRI人工物对于准确的心血管疾病评估至关重要. 本综述详细介绍了各种CMR序列中常见的工件,其原因以及工件减少策略,特别是在3-T成像中.
科学领域:
- 医疗成像医学成像
- 心血管疾病 心血管疾病
- 放射学 放射学是一门学科.
背景情况:
- 心脏MRI (CMR) 对于诊断心血管疾病至关重要.
- CMR图像采集带来了技术上的挑战,往往导致了文物.
- 了解和减轻这些文物对于诊断准确性至关重要.
研究的目的:
- 为了审查常见的心脏MRI文物.
- 为了解释这些文物的原因.
- 概述各种CMR序列和3T成像中的工件减轻策略.
主要方法:
- 综述常见的CMR序列,包括平衡稳定状态自由前行 (bSSFP),影像成像,晚期加多增强 (LGE),相对照成像和第一通透输液成像.
- 讨论文物类型,如带,流动,运动,别名,吉布斯声,以及与设备相关的文物.
- 探索缓解技术,包括有针对性的闪,序列参数调整,运动补偿,信号平均和专用序列.
主要成果:
- 平衡稳态自由前行 (bSSFP) 序列容易发生带和流动元件,在3-T中加剧,但可以通过特定技术进行管理.
- 实时序列可以改善心律失常或呼吸不良患者的电影成像质量.
- 晚期加多增强 (LGE) 文物可以使用单次拍摄技术来减少,但部分体积平均和不完整的取消仍然是挑战.
- 阶段对比成像需要仔细的速度编码,以避免伪造.
- 输液成像中的吉布斯可以从真正的缺陷中区分开来.
- 在LGE图像上的设备相关的工件可以通过宽带序列来减轻.
结论:
- 有效的文物识别和缓解对于可靠的CMR诊断至关重要.
- 存在特定的策略来处理各种CMR序列中的文物,包括那些具有更高场强度的文物,如3-T.
- 调整CMR技术是必要的,以克服成像方面的挑战,并确保诊断质量.
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