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学科主题: 口腔医学
题名:
Computed Tomography Imaging of Medpor: Graph-Cut Algorithm and Its Accuracy
作者: Liu, Xiao-jing1,2; Chen, Li3; Song, Wei3; Guo, Chuan-bin1,2; Yu, Guang-yan1,2
关键词: Porous polyethylene ; Medpor ; computed tomography ; Graph-cut algorithm ; gray-level algorithm
刊名: JOURNAL OF CRANIOFACIAL SURGERY
发表日期: 2012-05-01
DOI: 10.1097/SCS.0b013e31824dbd2f
卷: 23, 期:3, 页:758-761
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Surgery
研究领域[WOS]: Surgery
关键词[WOS]: POROUS POLYETHYLENE IMPLANT ; FIBROVASCULAR INGROWTH ; ORBITAL IMPLANT ; RECONSTRUCTION
英文摘要:

Porous polyethylene has become a popular alloplastic material for maxillofacial reconstruction. Despite its benefits, this material is radiolucent on conventional radiography. Computed tomography of traditional graphic segmentation based on gray levels was reported by a few authors, but the accuracy has not been described. The aim of this study was to image this material using segmentation based on Graph-cut algorithm. Another object was to compare accuracy of 2 algorithms. Between 2005 and 2010, 15 patients (12 females) participated in the study. Computed tomography was used for image acquisition. Graphic segmentation based on gray level involved use of the software OsiriX. Stroke-based specification for user interaction and Graph-cut segmentation involved a self-developed module. The accuracy of both segmentation algorithms was tested by comparing the volume of reconstructed Medpor with the actual volume measured by the draining method during surgery. Twenty-seven comparisons of the computed and actual volumes were gained. Linear regression was done between reconstructed and real volume. For the volume of Graph-cut algorithm, the regression equation was (T) over cap = -0.19425 + 1.02692S; the difference between the population intercept and zero was not significant (t = -0.83, P = 0.4172). For the volume of gray-level algorithm, the regression equation was (T) over cap = -1.15282 + 1.14101S; the difference between the population intercept and zero was significantd(t = -3.04, P = 0.0055). These results demonstrated porous polyethylene can be well defined by computed tomography segmentation with Graph-cut and gray-level algorithms. Graph-cut algorithm has a better accuracy compared with that of gray-level algorithm.

语种: 英语
所属项目编号: D0906007000091 ; 2009AA045201
项目资助者: Beijing Major Scientific Program ; National High-tech RD Program
WOS记录号: WOS:000304479600073
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/64503
Appears in Collections:北京大学口腔医学院_期刊论文

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作者单位: 1.Peking Univ, Sch Stomatol, Dept Oral & Maxillofacial Surg, Beijing 100081, Peoples R China
2.Peking Univ, Hosp Stomatol, Dept Oral & Maxillofacial Surg, Beijing 100081, Peoples R China
3.Tsinghua Univ, Sch Software, Beijing 100084, Peoples R China

Recommended Citation:
Liu, Xiao-jing,Chen, Li,Song, Wei,et al. Computed Tomography Imaging of Medpor: Graph-Cut Algorithm and Its Accuracy[J]. JOURNAL OF CRANIOFACIAL SURGERY,2012,23(3):758-761.
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