Measurement of stapes footplate thickness in otosclerosis by ultra-high-resolution computed tomography.
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| Title: | Measurement of stapes footplate thickness in otosclerosis by ultra-high-resolution computed tomography. |
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| Authors: | Akazawa, Yukinori (AUTHOR), Ganaha, Akira (AUTHOR), Higa, Teruyuki (AUTHOR), Kondo, Shunsuke (AUTHOR), Oyakawa, Yoshiki (AUTHOR), Hirakawa, Hitoshi (AUTHOR), Suzuki, Mikio (AUTHOR), Yamashiro, Tsuneo (AUTHOR) |
| Source: | Acta Oto-Laryngologica. Nov2020, Vol. 140 Issue 11, p899-903. 5p. |
| Subjects: | Computed tomography, Ear ossicles, Otosclerosis, Patients, Surgery, Inter-observer reliability, Descriptive statistics |
| Abstract (English): | Ultra-high-resolution computed tomography (U-HRCT) utilizes a 1024 × 1024 matrix with 0.25-mm section thickness, offering better spatial resolution than conventional multi-detector row CT to detect anatomic data for otologic surgery. We examined stapes footplate thickness using U-HRCT in relation to stapedotomy to predict the difficulty of the surgical procedure. Subjects were 12 otosclerosis patients and 25 controls who underwent diagnostic U-HRCT. A profile curve (Hounsfield units) was used to measure stapes footplate thickness along a perpendicular line across the stapes footplate in a plane parallel to the lateral semicircular canal. Footplate thickness was smaller at the midpoint than just before the anterior crus and just after the posterior crus. Interobserver variability was lowest at the midpoint, where foot plate thickness was significantly greater in the affected ear in otosclerosis patients compared with controls (0.60 ± 0.09 mm vs 0.46 ± 0.04 mm; p <.001). Otosclerosis patients were detected using U-HRCT with a high area under the curve. Difficulty in the stapes opening procedure correlated with stapes footplate thickness. Footplate thickness on U-HRCT correlated with temporal bone anatomy and corresponded to surgical difficulty. Significance: U-HRCT-derived anatomic data is useful for evaluating the stapes. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): | 背景：超高分辨率计算机断层扫描（U-HRCT）利用截面厚度为0.25毫米的1024 x1024矩阵, 比常规的多探测器行CT 提供更好的空间分辨率, 以检测用于耳科手术的解剖数据。 目的：我们使用U-HRCT检查与镫骨切开术相关的镫骨足板厚度, 以预测外科手术的难度。 材料和方法：受试者为接受诊断性U-HRCT的12名耳硬化症患者和25名对照者。轮廓曲线（Hounsfield单位）用于测量沿与侧半规管平行的平面上穿过镫骨足板的垂直线的镫骨足板厚度。 结果：足板厚度在中点处比前结节之前和后结节之后更小。观察者之间的差异性在中点处最低。与对照组相比, 耳硬化症患者的受累耳的该处足板厚度明显更大, 分别为0.60±0.09毫米和0.46±0.04毫米, p <.001。使用曲线下大面积的U-HRCT来检测耳硬化症患者。 镫骨打开手术的难度与镫骨足板厚度相关。 结论：U-HRCT的足板厚度与颞骨解剖结构相关, 并与手术难度相对应。 意义：U-HRCT得出的解剖数据对于评估镫骨非常有用。 [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | Ultra-high-resolution computed tomography (U-HRCT) utilizes a 1024 × 1024 matrix with 0.25-mm section thickness, offering better spatial resolution than conventional multi-detector row CT to detect anatomic data for otologic surgery. We examined stapes footplate thickness using U-HRCT in relation to stapedotomy to predict the difficulty of the surgical procedure. Subjects were 12 otosclerosis patients and 25 controls who underwent diagnostic U-HRCT. A profile curve (Hounsfield units) was used to measure stapes footplate thickness along a perpendicular line across the stapes footplate in a plane parallel to the lateral semicircular canal. Footplate thickness was smaller at the midpoint than just before the anterior crus and just after the posterior crus. Interobserver variability was lowest at the midpoint, where foot plate thickness was significantly greater in the affected ear in otosclerosis patients compared with controls (0.60 ± 0.09 mm vs 0.46 ± 0.04 mm; p <.001). Otosclerosis patients were detected using U-HRCT with a high area under the curve. Difficulty in the stapes opening procedure correlated with stapes footplate thickness. Footplate thickness on U-HRCT correlated with temporal bone anatomy and corresponded to surgical difficulty. Significance: U-HRCT-derived anatomic data is useful for evaluating the stapes. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00016489 |
| DOI: | 10.1080/00016489.2020.1788225 |
