扩散加权成像技术结合了呼吸触发和导航者回声跟踪在腹部上部
Yoshihiko Tachikawa1, Hiroshi Hamano2, Naoya Chiwata3
1Division of Radiological Technology, Department of Medical Technology, Karatsu Red Cross Hospital, 2430 Watada, Karatsu, Saga, 847-8588, Japan. yoshihiko-tachikawa@karatsu.jrc.or.jp.
Magma (New York, N.Y.)
|February 24, 2024
概括
一种新的RT + NV追踪方法通过结合呼吸触发和导航回声来改善腹部上部DWI,以获得更好的图像质量. 这种技术在更短的时间内提供稳定,高质量的扩散加权成像.
科学领域:
- 放射学 放射学是一门学科.
- 医疗成像医学成像
- 生物医学工程 生物医学工程
背景情况:
- 运动工件在腹部上部扩散加权成像 (DWI) 中显著降低图像质量.
- 现有的运动校正方法,如呼吸触发 (RT) 和导航回声 (NV),在有效地解决这些文物方面存在局限性.
研究的目的:
- 评估一种新的运动校正技术RT+NV Track的有效性,用于腹部上部DWI.
- 在图像质量和效率方面,将RT+NV Track与传统RT和NV方法的性能进行比较.
主要方法:
- RT+NV Track方法是通过将使用呼吸传感器的RT与使用导航器回声的NV集成而开发的.
- 在10名健康志愿者和35名患者中,使用DWI和明显扩散系数 (ADC) 地图来评估图像质量.
- 定量指标包括ADC值的信号对噪声效率 (SNR_efficiency) 和变化系数 (CV),以及五名放射科医生的定性评估.
主要成果:
- 与RT和NV两种方法相比,RT+NV轨道的SNR_效率显著更高 (p < 0.001).
- 新方法在CV和ADC值的视觉评估方面表现优于RT (p < 0.001),并且与NV相等或更好.
- RT+NV Track有效地获取呼气数据并纠正呼吸深度变化,最大限度地降低图像退化,即使在呼吸迅速的患者中也是如此.
结论:
- 该RT + NV轨道方法代表了高腹部DWI.一个高效的方法.
- 它成功地结合了RT和NV技术的优势,从而始终保持良好的图像质量.
- 这种方法可以在缩短的扫描时间内实现稳定和高质量的成像.
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