咽鼓管上隐窝形态特征MSCT多平面重组观察及测量研究  

Morphological Characteristics of Supertubual Recess Measured by Multiplanar Reconstruction from Multi-Slice Spiral CT Scans

作　　者：刘婷婷[1] 曹和涛[1] 黄虹[1] 苏海[1] 于芹[1] 

机构地区：[1]南通大学附属医院影像科,江苏226001

出　　处：《中华耳科学杂志》2014年第2期300-303,共4页Chinese Journal of Otology

摘　　要：目的观察咽鼓管上隐窝(STR)形态特征,探讨MSCT测量其大小的合理方法。方法两位经验丰富的医生对20例40侧正常颞骨MSCT容积数据进行后处理,分别沿听眦线(A法)、基线30°夹角线(B法)、水平线(C法)及听小骨(D法)重组Collins层面,沿锤砧关节长轴平行及垂直方向实时重组观察STR周壁形态,采用VR观察其大体形态特征,测量其最大深度(AP)和最大宽度(T)。取2位医师测量平均值作为统计数据进行分析,计算其变异系数,测量结果采用配对t检验。结果 STR前内、前外及前顶壁依据其气化程度呈不同程度弧形特征,后内和后外壁均较平直,大体形态呈现漏斗状。A^D四种方法AP均值依次为:(4.07±1.18)mm、(4.38±1.10)mm、(4.02±1.09)mm和(4.31±0.88)mm,其中,方法B和D显著大于方法A和C,变异系数:A>C>B>D;T均值分别为:(4.16±1.07)mm、(3.68±0.98)mm、(4.11±1.02)mm和(3.67±0.79)mm,其中,方法A和C显著大于方法B和D,变异系数:B>A>C>D。结论沿听小骨重组,解剖标志明确,操作简单,数据稳定,可作为测量STR大小可靠方法。Objective To study morphological characteristics of supertubual recess （STR） and develop an accurate meth-od to measure its sizes on MSCT. Methods MSCT volume data of 40 non-pathologic temporal bones from 20 patients were post-processed by two experienced radiologists. Collins planar was reconstructed along the OML（method A）, 30° to the base-line （method B）, along the horizontal line （method C） or the otosteon planes （method D）. The surrounding bony walls of STR were reconstructed and examined in real time along planes parallel or perpendicular to the incudomalleolar joint long axes. General morphological characteristics of STR was examined using VR. The deepest anterior-to-posterior diameter （AP） and longest transverse diameter （T） were measured. Average values were analyzed and their coefficient of variation（CV）were calcu-lated, Comparison among the four methods were done using paired t test. Results The antero-medial, antero-lateral and an-tero-superior walls of STR presented with arcs of various degrees corresponding to the degree of mastoid pneumatization. Both the posteromedial and posterolateral walls were relatively flat, in a generally funnel-shape. Mean AP diameter was 4.07±1.18 mm, 4.38±1.10 mm, 4.02±1.09 mm and 4.31±0.88 mm for Methods A, B, C and D, respectively. The AP diameters from Meth-ods B and D were greater than those from A and C. CV analysis among methods showed： A〉C〉B〉D. Mean T was 4.16 ± 1.07mm, 3.68±0.98 mm, 4.11±1.02 mm and 3.67±0.79 mm for Methods A, B, C and D, respectively, with those from Methods A and C greater than those from B and D. Analysis of CV for transverse diameter also showed：B〉A〉C〉D. Conclusion Recon-struction along otosteon planes can be used as a reliable method to measure the size of STR, providing clear anatomical land-marks, simple operation and reliable data.

关 键 词：咽鼓管上隐窝 多平面重组 测量 对比研究 

分 类 号：R814.42[医药卫生—影像医学与核医学]