Automatic Cochlear Duct Length Estimation for Selection of Cochlear Implant Electrode Arrays.
Automatic Cochlear Duct Length Estimation for Selection of Cochlear Implant Electrode Arrays.
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DOI：
10.1097/mao.0000000000001329
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
Noble JH
中科院分区：
文献类型：
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作者：
Rivas A;Cakir A;Hunter JB;Labadie RF;Zuniga MG;Wanna GB;Dawant BM;Noble JH
背景：CI电极阵列的选择可以通过测量CDL来影响，CDL是基于穿过蜗轴时连接圆窗和耳蜗侧壁的线的长度来估计的。CDL测量仍然很耗时，观察者之间的变异性还没有studyed.Methods：我们评估了一种自动的方法，直接测量两转（2T）CDL使用现有的算法定位耳蜗解剖结构的计算机断层扫描（CT）。对309耳的术前CT图像进行了评价。两个奖学金培训的神经学家手动和独立测量CDL。评估了专家和自动观察员之间测量值的观察员间变异性。观察者之间的差异选择的电极type.Results：CDL的手动测量专家往往低估耳蜗的大小，并具有较高的观察者之间的变异性，与平均绝对差异专家CDL的估计为1.15毫米。我们的研究结果表明，这可能会导致大量的耳蜗，不同的电极阵列类型将由不同的观察者选择，这取决于特定的阈值CDL用于决定之间的阵列type.Conclusion：选择最好的CI电极阵列是一项重要的任务，优化听力结果。手动耳蜗长度测量取决于用户，误差会影响某些患者的CI电极阵列选择。自动测量耳蜗长度耗时更少，并产生更可重复的结果。我们的自动化方法可以使CDL用于患者定制的治疗更具有临床适用性。
Background:CI electrode array selection can be influenced by measuring the CDL, which is estimated based on the length of the line that connects the round window and the lateral wall of the cochlea when passing through the modiolus. CDL measurement remains time consuming and inter-observer variability has not been studied.Methods:We evaluate an automatic approach to directly measure the two-turn (2T) CDL using existing algorithms for localizing cochlear anatomy in computed tomography (CT). Pre-op CT images of 309 ears were evaluated. Two fellowship-trained neurotologists manually and independently measured CDL. Inter-observer variability between measurements across expert and automatic observers is assessed. Inter-observer differences for choice of electrode type are also investigated.Results:Manual measurement of CDL by experts tends to underestimate cochlea size and has high inter-observer variability, with mean absolute differences between expert CDL estimations of 1.15 mm. Our results show that this can lead to a large number of cochleae for which a different electrode array type would be selected by different observers, depending on the specific threshold value of CDL used to decide between array type.Conclusion:Choosing the best CI electrode array is an important task for optimizing hearing outcomes. Manual cochleae length measurements are user-dependent, and errors impact upon the CI electrode array choice for certain patients. Measuring cochlea length automatically is less time consuming and generates more repeatable results. Our automatic approach could make use of CDL for patient-customized treatment more clinically adoptable.