Improved image quality of temporal bone CT with an ultrahigh-resolution CT scanner: clinical pilot studies
Improved image quality of temporal bone CT with an ultrahigh-resolution CT scanner: clinical pilot studies
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DOI：
10.1007/s11604-020-00987-5
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发表时间：
2020-05-11
影响因子：
2.1
通讯作者：
Yokoyama, Kenichi
中科院分区：
文献类型：
--
作者：
Ohara, Arisa;Machida, Haruhiko;Yokoyama, Kenichi
层厚0.25mm × 160、矩阵尺寸1024 × 1024的超高分辨率CT（UHRCT）已进入临床应用。我们比较了颞骨CT（TBCT）在UHRCT和常规多层螺旋CT（MDCT）之间的图像质量。材料与方法回顾性研究了20例经MDCT（矩阵大小，512 × 512）和UHRCT（矩阵大小，1024 × 1024）行TBCT检查的患者。两名独立的评审员主观地对正常镫骨、卵圆窗、面神经管、砧镫关节和鼓室盖的描绘进行分级。我们还量化了小脑半球的图像噪声。MDCT和UHRCT之间，我们使用Wilcoxon符号秩检验比较平均主观等级，使用配对t检验比较图像噪声。结果在所有解剖结构中，UHRCT的分级均显著高于MDCT（P < 0.001），而UHRCT的噪声显著高于MDCT（P = 0.002）。结论对于TBCT，UHRCT较MDCT能更好地显示精细解剖结构。
Purpose Ultrahigh-resolution CT (UHRCT) with slice collimation of 0.25 mm x 160 and matrix size of 1024 x 1024 has become clinically available. We compared the image quality of temporal bone CT (TBCT) between UHRCT and conventional multidetector CT (MDCT). Materials and methods We retrospectively enrolled 20 patients who underwent TBCT by MDCT (matrix size, 512 x 512) and subsequently by UHRCT (matrix size, 1024 x 1024). Two independent reviewers subjectively graded delineation of normal stapes, oval window, facial nerve canal, incudostapedial joint, and tympanic tegmen. We also quantified image noise in the cerebellar hemisphere. Between MDCT and UHRCT, we compared mean subjective grades using the Wilcoxon signed-rank test and the image noise using paired t test. Results Grades were significantly higher with UHRCT than with MDCT for all the anatomies (P < 0.001), whereas noise was significantly higher with UHRCT than with MDCT (P = 0.002). Conclusion For TBCT, UHRCT shows better delineation of the fine anatomical structures compared with MDCT.