Ultrahigh-resolution CT scan of the temporal bone
Ultrahigh-resolution CT scan of the temporal bone
复制标题
DOI：
10.1007/s00405-018-5101-6
复制
发表时间：
2018-11-01
影响因子：
2.6
通讯作者：
Honda, Hiroshi
中科院分区：
文献类型：
--
作者：
Yamashita, Koji;Hiwatashi, Akio;Honda, Hiroshi
目的超高分辨率CT(U-HRCT)比传统的多层螺旋CT(ConvCT)具有更好的空间分辨率，具有0.25 mm的准直度、1792个通道和160个探测器行、0.4x0.5 mm的焦点尺寸和1024个矩阵，有望识别微结构。材料与方法30例患者，男14例，女16例，年龄8~82岁，中位年龄49岁。所有CT图像层厚0.5 mm，矩阵512×512，视野80 mm。在120KV螺旋扫描模式下，在平行于眶内平面的平面内进行横断面扫描。两位独立的神经放射科医生检查了30个健侧颞骨的图像，并对U-HRCT和ConvCT的关键解剖结构的可见性进行了评估。采用Wilcoxon配对符号秩次检验比较U-HRCT和ConvCT的评分。结果U-HRCT的观察者间一致性良好(=0.920)，而常规CT的一致性好(=0.733)。两位观察者均认为，与常规CT相比，U-HRCT能更清晰地显示距骨肌腱(p
ObjectiveUltrahigh-resolution CT (U-HRCT) provides better spatial resolution than conventional multi-detector row CT (ConvCT) and could be expected to identify microstructures with its 0.25-mm collimation, 1792 channels and 160 detector rows, 0.4x0.5mm focus size, and a 1024 matrix. The aim of the study was to evaluate key anatomic structures in temporal bone using U-HRCT comparing it to ConvCT.Materials and methodsA total of 30 patients (14 males and 16 females; age range, 8-82 years; median 49years) underwent both U-HRCT and ConvCT. All CT images were obtained with 0.5mm section thickness and a 512x512 matrix, and field of view of 80mm. Transverse scans were acquired in a plane parallel to the orbitomeatal plane in the helical mode with 120kV. Images of the 30 temporal bones of unaffected side were reviewed by two independent neuroradiologists who rated the visibility of key anatomic structures for both U-HRCT and ConvCT. The ratings between U-HRCT and ConvCT were compared using Wilcoxon matched-pairs signed rank test. The interobserver agreement on the rating of stapedius tendon was evaluated using weighted statistics.ResultsExcellent interobserver agreement was shown for U-HRCT (=0.920), whereas good agreement was obtained for ConvCT (=0.733). According to both observers, stapedius tendon was more clearly visualized using U-HRCT than ConvCT (p