CAJ | 학술논문

目的寻找准确、可行的内耳CT形态学测量方法 ,评价不同测量者之间的一致性.方法对60例外、中、内耳结构正常者的颢骨高分辨力CT图像进行多平面重组(multi-planarreforamtions,MPR),在显示耳蜗最大剖面的MPR图像上测量耳蜗的高度和宽度,在可完整地显示半规管形态的MPR图像上测量各个半规管所环绕的骨岛面积.对两位测量者的结果进行统计学分析.结果 MPR获得了良好的耳蜗和半规管的影像解剖学显示.配对t检验显示两位测量者的结果之间差异无统计学意义(P值均>0.05),相关分析表明二者所测结果之间具有良好的一致性(r值均>0.9).其中耳蜗高度(x±s,下同)为(4.26±0.28)mm,耳蜗宽度为(7.03±0.39)mm,前半规管环绕骨岛面积为(25.49 ±3.84)mm<'2>,后半规管环绕骨岛面积为(20.07 ±2.93)mm<'2>,外半规管环绕骨岛面积为(11.50±1.94)mm<'2>.结论MPR可分别显示内耳各结构的中轴层面,在此基础上的测量具有良好的可重复性,可提供可靠的内耳形态学参数.
목적 심조준학、가행적내이CT형태학측량방법 ,평개불동측량자지간적일치성.방법 대60예외、중、내이결구정상자적호골고분변력CT도상진행다평면중조(multi-planarreforamtions,MPR),재현시이와최대부면적MPR도상상측량이와적고도화관도,재가완정지현시반규관형태적MPR도상상측량각개반규관소배요적골도면적.대량위측량자적결과 진행통계학분석.결과 MPR획득료량호적이와화반규관적영상해부학현시.배대t검험현시량위측량자적결과 지간차이무통계학의의(P치균>0.05),상관분석표명이자소측결과 지간구유량호적일치성(r치균>0.9).기중이와고도(x±s,하동)위(4.26±0.28)mm,이와관도위(7.03±0.39)mm,전반규관배요골도면적위(25.49 ±3.84)mm<'2>,후반규관배요골도면적위(20.07 ±2.93)mm<'2>,외반규관배요골도면적위(11.50±1.94)mm<'2>.결론MPR가분별현시내이각결구적중축층면,재차기출상적측량구유량호적가중복성,가제공가고적내이형태학삼수.
Objective The aim of this study was to find an accurate and feasible measurement technique for the inner ear structures using computed tomograpby and to check the inter-observer agreement. Methods Sixty patients without abnormal structure of temporal bones confirmed by means of high-resolution computed tomograpby were included in this study. The multi-planar reformations (MPR) were performed to show the maximum profile of cochlear, and to measure the height and width of cochlear. Areas of bony island encircled by three semicircular canals were measured on the MPR images that could show the whole canal. The data measured by two readers independently was compared to check the inter-observer agreement. Results The application of MPR yielded satisfactory anatomic presentation of inner ear for radiologic measurements. There was good inter-observer agreement revealed by the paired t-test and correlation analysis (P > 0. 05, r > 0. 9). The height of cochlear(x±s) was (4. 26± 0. 28) mm while the width of cochlear was (7.03 ±0. 39)ram. The areas of bony islands encircled by the anterior, posterior and lateral semicircular canals were (25.49 ± 3. 84)mm<'2>, (20. 07 ± 2. 93)mm<'2 >and (11.50 ± 1.94) mm<'2>, respectively. Conclusions MPR can display structures of cochlear and semicircular canals on planes along their central axis. Normative measurements on these MPR images derive excellent repeatability and provide reliable morphologic parameters of inner ear structures.