本文選題：虛擬手術(shù) + 宮腹腔鏡��； 參考：《哈爾濱工程大學(xué)》2012年碩士論文

【摘要】：隨著虛擬現(xiàn)實(shí)技術(shù)和現(xiàn)代醫(yī)學(xué)的快速發(fā)展，虛擬現(xiàn)實(shí)技術(shù)已被廣泛應(yīng)用到醫(yī)學(xué)仿真中，形成虛擬手術(shù)仿真這一全新的研究領(lǐng)域。目前，隨著現(xiàn)代醫(yī)學(xué)的不斷發(fā)展，內(nèi)窺鏡手術(shù)因其所具有的康復(fù)快、術(shù)后痛苦小、傷口小和后遺癥少等優(yōu)勢而得到了非常廣泛的應(yīng)用。但是它也有其自身的缺點(diǎn)，如進(jìn)行手術(shù)的醫(yī)生的手和眼協(xié)調(diào)起來比較困難，而對于那些復(fù)雜度較高的內(nèi)窺鏡手術(shù)，醫(yī)生必須經(jīng)過長期的訓(xùn)練才能進(jìn)行實(shí)際操作。把虛擬現(xiàn)實(shí)與內(nèi)窺鏡手術(shù)結(jié)合起來，開發(fā)一個虛擬內(nèi)窺鏡手術(shù)仿真系統(tǒng)，能有效地解決傳統(tǒng)的訓(xùn)練模式下訓(xùn)練成本高、訓(xùn)練過程無法重復(fù)等缺點(diǎn)。 本文以虛擬宮腹腔鏡手術(shù)仿真系統(tǒng)為研究背景，首先開發(fā)其軟件部分，主要對其中的碰撞檢測、物理建模和計(jì)算建模等關(guān)鍵技術(shù)進(jìn)行了研究。 在碰撞檢測方面，綜合考慮虛擬宮腹腔鏡手術(shù)仿真系統(tǒng)中對真實(shí)性和實(shí)時性的要求，將混合的層次包圍盒方法與光線跟蹤法結(jié)合起來，，提出一種新的基于復(fù)合層次包圍盒和光線跟蹤的改進(jìn)碰撞檢測算法，并提出一種偽碰撞點(diǎn)對過濾算法。 在軟組織變形仿真方面，針對虛擬宮腹腔鏡手術(shù)仿真特定的需要，在對宮腹腔內(nèi)各種軟組織的生物力學(xué)特性進(jìn)行詳細(xì)的闡述之后，選擇混合的粘彈性模型，并在傳統(tǒng)的有限元法的基礎(chǔ)上，綜合考慮線性粘彈性的快速和非線性粘彈性的準(zhǔn)確性，將兩者結(jié)合起來，提出基于有限元的混合粘彈性的軟組織變形仿真算法。
[Abstract]:With the rapid development of virtual reality technology and modern medicine, virtual reality technology has been widely used in medical simulation, forming a new research field of virtual surgery simulation. At present, with the development of modern medicine, endoscopic surgery has been widely used because of its advantages of quick recovery, small postoperative pain, small wound and less sequelae. But it also has its own disadvantages, such as the hand and eye coordination of the surgeon is more difficult, and for those with high complexity of endoscopic surgery, doctors must undergo long-term training before the actual operation. By combining virtual reality with endoscopic surgery, a virtual endoscope surgery simulation system is developed, which can effectively solve the disadvantages of high training cost in traditional training mode, and the training process can not be repeated. In this paper, the virtual hysteroscope surgery simulation system is used as the research background. Firstly, the software part is developed, and the key technologies such as collision detection, physical modeling and computational modeling are studied. In the aspect of collision detection, considering the requirement of authenticity and real-time in virtual hysteroscopy surgery simulation system, the hybrid hierarchical bounding box method is combined with ray-tracing method. An improved collision detection algorithm based on composite hierarchy bounding box and ray tracking is proposed, and a pseudo collision point pair filtering algorithm is proposed. In the aspect of soft tissue deformation simulation, according to the specific needs of virtual hysteroscopy surgery simulation, after elaborating the biomechanical characteristics of various soft tissues in the abdominal cavity of uterus in detail, the mixed viscoelastic model is selected. Based on the traditional finite element method and considering the accuracy of linear viscoelasticity and nonlinear viscoelasticity, a finite element method for soft tissue deformation simulation of mixed viscoelasticity is proposed.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：R318.6;TP391.9

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