本文關(guān)鍵詞： CBCT MRI 圖像配準(zhǔn) 下頜骨矢狀劈開 三維模型　出處：《浙江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：目的基于硬質(zhì)骨配準(zhǔn)的CBCT和MRI數(shù)據(jù)融合重建下頜骨矢狀劈開術(shù)可視化模型。方法選取一名符合下頜骨矢狀劈開術(shù)適應(yīng)征的Ⅱ類錯(cuò)頜畸形志愿者,掃描器顳下頜關(guān)節(jié)MRI及頭顱CBCT數(shù)據(jù),分別將其導(dǎo)入Mimics軟件當(dāng)中,獲得牙列、下頜骨、關(guān)節(jié)窩、關(guān)節(jié)盤等組織結(jié)構(gòu)模型,在Abaqus軟件中構(gòu)建手術(shù)鈦板、鈦釘模型,在Geomagic Studio軟件中,進(jìn)行模型的優(yōu)化處理,并進(jìn)行MRI和CBCT影響的精確配準(zhǔn),構(gòu)建關(guān)節(jié)軟骨、牙周膜等結(jié)構(gòu)。獲得三維模型后,在模型表面模擬下領(lǐng)骨矢狀劈開術(shù)截骨線并模擬下頜前移,進(jìn)行布爾運(yùn)算,獲得下頜骨矢狀劈開術(shù)的可視化模型。結(jié)果1.對(duì)配準(zhǔn)的MRI影像和CBCT影像行3D偏差檢驗(yàn):右側(cè)平均偏差0.17mm±0.31mm,左側(cè)平均偏差0.32mm±0.35mm,兩者3D偏差小、配準(zhǔn)精確度高。2.建立了包含顳下頜關(guān)節(jié)在內(nèi)的下頜骨矢狀劈開術(shù)的三維可視化模型,模型各解剖結(jié)構(gòu)清晰,手術(shù)模擬效果良好。結(jié)論1.基于硬質(zhì)骨在MRI和CBCT中的影像特征配準(zhǔn),可有效地對(duì)MRI和CBCT三維影像進(jìn)行空間配準(zhǔn),其配準(zhǔn)后關(guān)節(jié)盤生理結(jié)構(gòu)復(fù)位良好,可真實(shí)模擬關(guān)節(jié)盤在關(guān)節(jié)窩中的位置。2.通過逆向軟件構(gòu)建包含顳下頜關(guān)節(jié)在內(nèi)的下頜骨矢狀劈開術(shù)的三維可視化模型,可真實(shí)模擬手術(shù)截骨線、下頜前移以及內(nèi)固定位置等操作,具有較大的臨床使用意義。
[Abstract]:Objective to reconstruct a visual model of sagittal split mandible based on CBCT and MRI data fusion of rigid bone registration. The data of temporomandibular joint (MRI) and cranial CBCT were imported into Mimics software, respectively. The tissue structure models of dentition, mandible, articular fossa and articular disc were obtained. The models of titanium plate and nail were constructed in Abaqus software, and the model of titanium nail was constructed in Geomagic Studio software. The model was optimized, and the effects of MRI and CBCT were accurately matched to construct the articular cartilage and periodontal ligament. After the 3D model was obtained, the osteotomy line of sagittal split of the collar was simulated on the surface of the model and the mandibular anterior displacement was simulated. The visual model of sagittal split mandible was obtained by Boolean operation. Results 1. The 3D deviation of registered MRI and CBCT images was 0.17mm 鹵0.31mm on the right side and 0.32mm 鹵0.35mm on the left side. 2. The 3D visualization model of sagittal split mandible including temporomandibular joint was established. The anatomical structure of the model was clear and the result of operation simulation was good. Conclusion 1. Based on the image feature registration of rigid bone in MRI and CBCT, The spatial registration of MRI and CBCT images can be carried out effectively, and the physiological structure of the articular disc can be reset well after registration. The 3D visualization model of sagittal split mandible including temporomandibular joint is constructed by reverse software, and the osteotomy line can be simulated. Mandibular anterior movement and internal fixation are of great clinical significance.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：R782

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