A computer based facial flaps simulator using projective dynamics
A computer based facial flaps simulator using projective dynamics
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DOI：
10.1016/j.cmpb.2022.106730
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发表时间：
2022-03-10
影响因子：
6.1
通讯作者：
Sifakis, Eftychios
中科院分区：
文献类型：
--
作者：
Wang, Qisi;Tao, Yutian;Sifakis, Eftychios
背景与目的：利用有限元方法模拟人体皮肤力学的交互式手术模拟一直是一个难以实现的目标。质量弹簧网络虽然快，但不能提供所需的精度。方法：提出了一种基于投影动力学计算框架的交互式认知面部皮瓣模拟器。投射动力学能够在外科医生对面部软组织进行改变后产生快速、稳定的结果，即使在皮肤阻力突然增加（达到其拉伸极限）或组织之间发生碰撞时也是如此。我们以前用有限元法进行的工作受到这些考虑的阻碍。提供手术工具用于；皮肤切开，破坏，深层组织切割和切除。一个类似弹簧的“皮肤钩”用于收缩。基于弹簧的缝合线可以单独放置或自动放置在基本缝合线之间。结果：Abbe/Estlander唇部重建的例子，旁位前额皮瓣到鼻子，耳廓后皮瓣重建外耳，颈部面部皮瓣重建脸颊缺损。结论：作为交互式软组织手术模拟的物理基础，投影动力学比质量-弹簧法和有限元法具有明显的优势。(c) 2022作者。这是一篇基于CC by-nc-nd许可的开放获取文章（http://creativecommons.org/licenses/by-nc-nd/4.0/）
Background and Objectives: Interactive surgical simulation using the finite element method to model human skin mechanics has been an elusive goal. Mass-spring networks, while fast, do not provide the required accuracy. Methods: This paper presents an interactive, cognitive, facial flaps simulator based on a projective dynamics computational framework. Projective dynamics is able to generate rapid, stable results following changes to the facial soft tissues created by the surgeon, even in the face of sudden increases in skin resistance as its stretch limit is reached or collision between tissues occurs. Our prior work with the finite element method had been hampered by these considerations. Surgical tools are provided for; skin incision, undermining, deep tissue cutting, and excision. A spring-like "skin hook" is used for retraction. Spring-based sutures can be placed individually or automatically placed as a row between cardinal sutures.Results: Examples of an Abbe/Estlander lip reconstruction, a paramedian forehead flap to the nose, a retroauricular flap reconstruction of the external ear, and a cervico-facial flap reconstruction of a cheek defect are presented.Conclusions: Projective dynamics has significant advantages over mass-spring and finite element methods as the physics backbone for interactive soft tissue surgical simulation.(c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ )