Computer Science Department, FAU Erlangen, and Siemens Healthcare, Computed Tomography.
IEEE Trans Vis Comput Graph. 2013 Dec;19(12):2828-37. doi: 10.1109/TVCG.2013.169.
The precise modeling of vascular structures plays a key role in medical imaging applications, such as diagnosis, therapy planning and blood flow simulations. For the simulation of blood flow in particular, high-precision models are required to produce accurate results. It is thus common practice to perform extensive manual data polishing on vascular segmentations prior to simulation. This usually involves a complex tool chain which is highly impractical for clinical on-site application. To close this gap in current blood flow simulation pipelines, we present a novel technique for interactive vascular modeling which is based on implicit sweep surfaces. Our method is able to generate and correct smooth high-quality models based on geometric centerline descriptions on the fly. It supports complex vascular free-form contours and consequently allows for an accurate and fast modeling of pathological structures such as aneurysms or stenoses. We extend the concept of implicit sweep surfaces to achieve increased robustness and applicability as required in the medical field. We finally compare our method to existing techniques and provide case studies that confirm its contribution to current simulation pipelines.
血管结构的精确建模在医学成像应用中起着关键作用，例如诊断、治疗计划和血流模拟。特别是血流模拟需要高精度的模型才能产生准确的结果。因此，在模拟之前对血管分割进行广泛的手动数据细化是常见的做法。这通常涉及一个复杂的工具链，对于临床现场应用来说极不切实际。为了弥补当前血流模拟管道中的这一差距，我们提出了一种基于隐式扫掠曲面的交互式血管建模新技术。我们的方法能够根据几何中心线描述实时生成和校正平滑的高质量模型。它支持复杂的血管自由形态轮廓，因此可以准确快速地对动脉瘤或狭窄等病理结构进行建模。我们扩展了隐式扫掠曲面的概念，以实现医疗领域所需的更高的鲁棒性和适用性。最后，我们将我们的方法与现有技术进行了比较，并提供了案例研究，证实了它对当前模拟管道的贡献。
