Frakes David, Smith Mark, de Zélicourt Diane, Pekkan Kerem, Yoganathan Ajit
Georgia Institute of Technology, Atlanta, GA 30332, USA.
J Biomech Eng. 2004 Dec;126(6):727-35. doi: 10.1115/1.1824117.
The problem of inter-slice magnetic resonance (MR) image reconstruction is encountered often in medical imaging applications, in such scenarios, there is a need to approximate information not captured in contiguously acquired MR images due to hardware sampling limitations. In the context of velocity field reconstruction, these data are required for visualization and computational analyses of flow fields to be effective. To provide more complete velocity information, a method has been developed for the reconstruction of flow fields based on adaptive control grid interpolation (ACGI). In this study, data for reconstruction were acquired via MRJ from in vitro models of surgically corrected pediatric cardiac vasculatures. Reconstructed velocity fields showed strong qualitative agreement with those obtained via other acquisition techniques. Quantitatively reconstruction was shown to produce data of comparable quality to accepted velocity data acquisition methods. Results indicate that ACGI-based velocity field reconstruction is capable of producing information suitable for a variety of applications demanding three-dimensional in vivo velocity data.
层间磁共振（MR）图像重建问题在医学成像应用中经常遇到。在这种情况下，由于硬件采样限制，需要近似连续采集的MR图像中未捕获的信息。在速度场重建的背景下，这些数据对于流场的可视化和计算分析至关重要。为了提供更完整的速度信息，已经开发了一种基于自适应控制网格插值（ACGI）的流场重建方法。在本研究中，通过MRJ从手术矫正的小儿心脏血管体外模型获取重建数据。重建的速度场与通过其他采集技术获得的速度场在定性上有很强的一致性。定量重建显示，所产生的数据质量与公认的速度数据采集方法相当。结果表明，基于ACGI的速度场重建能够产生适用于各种需要三维体内速度数据的应用的信息。
