本文關(guān)鍵詞：錐形束CT與螺旋CT對髁突成像三維重建后線性測量準確性和可靠性的評價，，由筆耕文化傳播整理發(fā)布。

        目的本研究的目的是評價錐形束CT與螺旋CT對髁突成像三維重建后線性測量的準確性和可靠性。材料和方法選取10個干燥的完整的40-60歲的成年男性的下頜骨,分別采用意大利維羅納Quantitative Radiology公司生產(chǎn)的Newtom3G CBCT機和美國通用電器公司生產(chǎn)Light Speed16層螺旋CT機對其進行掃描,然后將獲得的CT數(shù)據(jù)導(dǎo)入Mimics10.01軟件,三維重建其相應(yīng)的三維數(shù)字化模型。本研究選取12個測量項目對髁突進行了系統(tǒng)的測量。兩名研究員在2周內(nèi)分別對錐形束CT數(shù)字化模型、螺旋CT數(shù)字化模型和髁突實體進行3次測量,并將6次測量的平均值分別作為錐形束CT測量值、螺旋CT測量值、實體測量值。采用SPSS13.0統(tǒng)計軟件分別對錐形束CT測量數(shù)據(jù)與實體測量值、螺旋CT測量值與實體測量值、錐形束CT測量數(shù)據(jù)與螺旋CT測量值進行統(tǒng)計分析,以P≤0.05為檢驗水準,用配對t檢驗,比較不同測量方法之間的一致性。測量的準確性用平均絕對誤差和平均絕對百分誤差評價。以P≤0.05為檢驗水準,用配對t檢驗的方法比較錐形束CT和螺旋CT對髁突三維重建后線性測量的準確性。用兩因素方差分析對研究員自身和研究員之間的測量值進行統(tǒng)計,研究員自身和研究員之間測量的可靠性用組內(nèi)相關(guān)系數(shù)來評價。結(jié)果1.三種測量方法所測得的數(shù)據(jù)相互之間無明顯統(tǒng)計學(xué)差異(P>0.05)。錐形束CT對髁突成像三維重建后的線性測量與螺旋CT對髁突成像三維重建后的線性測量有一致性。2.錐形束CT對髁突三維重建后線性測量的準確性與螺旋CT對髁突三維重建后線性測量的準確性之間無統(tǒng)計學(xué)差異。錐形束CT的平均絕對誤差為0.27mm(±0.19mm),螺旋CT的平均絕對誤差為0.20mm(±0.17mm)。錐形束CT和螺旋CT的平均絕對百分誤差分別為0.98%(±0.73%)和1.26%(±1.50%)。3.錐形束CT和螺旋CT的研究員自身和研究員之間測量值的組內(nèi)相關(guān)系數(shù)均大于0.9,有較好的測量可靠性結(jié)論錐形束CT測量的準確性雖然比螺旋CT三維測量的準確性略小,但仍具有較好的準確性和可靠性,可以作為一種對患者損傷小、能準確、便捷獲得三維圖像的影像學(xué)方法,替代螺旋CT用于髁突的臨床檢查和研究。

    ObjectiveThe purpose of this study was to evaluate the accuracy and reliability of condylar three-dimensional reconstruction linear measurements obtained from cone beam CT (CBCT) and multislice CT (MSCT)Materials and Methods10dry male mandibles aged form40-60years old were selected. The mandibles were scanned with NewTom3G CBCT(Quantitative Radiology, Verona. Italy) and Light Speedl6MSCT(General Electric, America). Mimics10.01software was used for three-dimensional reconstruction and measurements on imaging data. Twelve interlandmark linear measurements were made directly on the condyle and compared with the same measurements made on the CBCT scans and MSCT scans. All measurements were made by2operators on3separate occasions. The CT measurements were established as the mean of the6measurements. Anatomic truth was established with6direct caliper measurements. Analysis of the data was conducted by using SPSS13.0statistical software. The consistency among the three measurements was analyzed by paired t test. A P value of P≤0.05was used to assign statistical significance. The accuracy of these measurements was expressed by means of the absolute error (MAE) and absolute percentage error (APE).As a measure of reliability, the intraclass correlation coefficient (ICC) for absolute agreement based on a2-way random-effects analysis of variance (ANOVA) was calculated among the3measurement methods.Results1.No significant statistical differences among the three measurement methods(P>0.05). Linear measurements of condylar three-dimensional reconstruction obtained from CBCT were consistent with MSCT.2. No significant statistical differences between the measurement accuracy of CBCT and MSCT.MAE was0.27mm (±0.19mm) for the CBCT device and0.20mm (±0.17mm) for the MSCT device. APE was0.98%(±0.73%) and1.26%(±1.50%), respectively.3. The ICC of the measurements of the images of CBCT and MSCT were all more than0.9. The reliability of condylar three-dimensional reconstruction linear measurements obtained from cone beam CT and multislice CT was good.ConclusionMSCT scans proved slightly more accurate in linear measurement. The accuracy and the reliability of CBCT were good. CBCT device can be used in condylar clinical examination instead of MSCT device.

          錐形束CT與螺旋CT對髁突成像三維重建后線性測量準確性和可靠性的評價

中文摘要6-8ABSTRACT8-9符號說明10-11前言11-15材料與方法15-19結(jié)果19-20討論20-22結(jié)論22-23附圖23-25附表25-29參考文獻29-35綜述 錐形束CT技術(shù)及其在正畸中的應(yīng)用35-50    參考文獻41-50致謝50-51攻讀學(xué)位期間發(fā)表的學(xué)術(shù)論文51

  本文關(guān)鍵詞：錐形束CT與螺旋CT對髁突成像三維重建后線性測量準確性和可靠性的評價，由筆耕文化傳播整理發(fā)布。