由於現今電腦斷層攝影術(Computed tomography，CT)已經相當普及，有鑑於CT影像對骨組織的高顯像能力，絕大多數的骨病變病患在手術前都會進行CT造影。CT影像在院內大多僅被用於二維的病理判讀，但一組序列式CT影像能夠提供病患身體的三維資訊，因此從CT影像能夠進行骨組織的三維模型重建，現今亦有許多研究是針對這個方向在進行。本研究之研究對象是針對CT影像的利用，從多用途之生醫影像軟體平台的建構開始，進行包括序列影像的三維顯示技術、骨組織的分離擷取技術以及骨組織的三維模型重建技術的開發；為了跳脫傳統二維顯示介面，本研究以三維顯示技術為基礎以增加介面的靈活度及直覺性，三維顯示之核心演算法則是以光線投射法及立體渲染法為主；為了能夠分離各個骨組織，本研究改良傳統區域成長法的缺陷，以多區域的概念配合自行開發之演算法進行複數骨組織的分離及擷取；最後的網格化則是採用行進方塊法，並配合本研究之需求略作修改及調整。 Three-dimensional (3D) surface reconstruction from computed tomography (CT) slices has been received more and more attention in preoperative planning as it provides three-dimensional data of the tissue of interest, rather than two-dimensional images . CT has highly developing capability of bone tissue , thus CT images are usually used for bone diseases . This research aims to the usage of CT image , starting from the construction of multipurpose medical imaging software , including 3D display , segmentation of bone tissue and triangulation ; For mobility and intuition , we use ray-casting and volume-rendering to achieve high performance 3D display functions . We improved traditional region-growing algorithm in order to segment bone tissues . And we use improved marching-cubes to triangulate bone tissues .
