Wein Wolfgang, Pache Fabian, Röper Barbara, Navab Nassir
Chair for Computer Aided Medical Procedures (CAMP), TU Munich Boltzmannstr. 3, 85748 Garching, Germany.
Med Image Comput Comput Assist Interv. 2006;9(Pt 2):750-7. doi: 10.1007/11866763_92.
Freehand 3D ultrasound systems acquire sets of B-Mode ultrasound images tagged with position information obtained by a tracking device. For both further processing and clinical use of these ultrasound slice images scattered in space, it is often required to reconstruct them into 3D-rectilinear grid arrays. We propose new efficient methods for this so-called ultrasound spatial compounding using a backward-warping paradigm. They allow to establish 3D-volumes from any scattered freehand ultrasound data with superior quality / speed properties with respect to existing methods. In addition, arbitrary MPR slices can be reconstructed directly from the freehand ultrasound slice set, without the need of an extra volumetric reconstruction step. We qualitatively assess the reconstruction quality and quantitatively compare our compounding method to other algorithms using ultrasound data of the neck and liver. The usefulness of direct MPR reconstruction for multimodal image registration is demonstrated as well.
徒手三维超声系统获取一组带有由跟踪设备获得的位置信息的B型超声图像。对于这些分散在空间中的超声切片图像的进一步处理和临床应用，通常需要将它们重建为三维直角网格阵列。我们提出了一种使用反向扭曲范式进行这种所谓超声空间复合的新的高效方法。相对于现有方法，它们能够以更高的质量/速度属性从任何分散的徒手超声数据建立三维体积。此外，可以直接从徒手超声切片集重建任意多平面重组（MPR）切片，而无需额外的体积重建步骤。我们定性评估重建质量，并使用颈部和肝脏的超声数据将我们的复合方法与其他算法进行定量比较。还展示了直接MPR重建在多模态图像配准中的有用性。
