在线非刚性运动校正的可行性,用于高分辨率的卧床乳房MRI
Karyna Isaieva1, Camille Meullenet2, Pierre-André Vuissoz1
1IADI, Université de Lorraine, INSERM U1254, Nancy, France.
Magnetic resonance in medicine
|June 28, 2023
概括
这项研究展示了一种快速的在线方法,用于在仰卧乳房MRI期间纠正运动,改善T2加权扫描的图像质量. 该技术为更清晰的乳腺MRI结果提供了临床可行的解决方案.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- 生物医学工程 生物医学工程
背景情况:
- 传统的乳房MRI使用俯卧姿势,这与其他成像或干预姿势不一致.
- 仰胸MRI提供了一个替代方案,但在呼吸运动方面面临挑战.
- 目前的离线运动校正方法没有被整合到临床工作流程中.
研究的目的:
- 为了证明一个快速的,在线的,运动纠正的复建的可行性,躺卧的乳房MRI.
- 将运动校正集成到临床工作流程中,以便立即访问.
- 评估在线运动校正对图像质量的影响.
主要方法:
- 在自由呼吸期间获得T2加权和加速T1加权的卧卧乳房MRI.
- 实施非刚性运动校正技术 (通过对联系统的反转进行一般化重建).
- 在线重建使用组合的MR原始数据和呼吸信号,具有优化的参数和放射科医生评分.
主要成果:
- 在线重建时间为2到2.5分钟.
- 对T2加权和T1加权序列的运动工件指标和分数的显著改进.
- T2加权图像质量接近于倾向成像的图像质量;T1加权图像质量仍然较低.
结论:
- 在线算法有效地减少了运动器件,并提高了卧式乳房成像的诊断质量.
- 重建时间在临床上是可以接受的.
- 需要进一步开发以改善T1加权图像质量.
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