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Evaluation of Cochlear Duct Length Measurements From a 3D Analytical Cochlear Model Using Synchrotron Radiation Phase-Contrast Imaging.

使用同步辐射相衬成像从3D分析耳蜗模型评估耳蜗导管长度测量。

  • 影响因子:1.87
  • DOI:10.1097/MAO.0000000000002420
  • 作者列表:"Helpard LW","Rohani SA","Ladak HM","Agrawal SK
  • 发表时间:2020-01-01
Abstract

HYPOTHESIS:Evaluating the accuracy of cochlear duct length (CDL) measurements from a published three-dimensional (3D) analytical cochlear model using Synchrotron Radiation Phase-Contrast Imaging (SR-PCI) data will help determine its clinical applicability and allow for model adjustments to increase accuracy. BACKGROUND:Accurate CDL determination can aid in cochlear implant sizing for full coverage and frequency map programming, which has the potential to improve hearing outcomes in patients. To overcome problems with the currently available techniques for CDL determination, a novel 3D analytical cochlear model, dependent on four basal turn distances, was proposed in the literature. METHODS:SR-PCI data from 11 cadaveric human cochleae were used to obtain reference measurements. CDL values generated by the analytical cochlear model were evaluated in two conditions: when the number of cochlear turns (NCT) were automatically predicted based on the four input distances, and when the NCT were manually specified based on SR-PCI data. RESULTS:When the analytical cochlear model automatically predicted the NCT, the mean absolute error was 2.6 ± 1.6 mm, with only 27% (3/11) of the samples having an error in the clinically acceptable range of ±1.5 mm. When the NCT were manually specified based on SR-PCI data, the mean absolute error was reduced to 1.0 ± 0.6 mm, with 73% (8/11) of the samples having a clinically acceptable error. CONCLUSION:The 3D analytical cochlear model introduced in the literature is effective at modeling the 3D geometry of individual cochleae, however tuning in the NCT estimation is required.

摘要

假设: 使用同步辐射相衬成像 (sr-pci) 数据评估来自已发表的三维 (3D) 分析耳蜗模型的耳蜗导管长度 (CDL) 测量的准确性将有助于确定其临床适用性,并允许模型调整以提高准确性。 背景: 准确的CDL测定可以帮助人工耳蜗尺寸的全覆盖和频率图编程,这有可能改善患者的听力结果。为了克服目前可用的用于CDL确定的技术的问题,在文献中提出了一种新的3D分析耳蜗模型,依赖于四个基础转弯距离。 方法: 使用来自11个人类尸体耳蜗的sr-pci数据来获得参考测量值。在两个条件下评估由分析耳蜗模型生成的CDL值: 当基于四个输入距离自动预测耳蜗转数 (NCT) 时,以及当基于sr-pci数据手动指定NCT时。 结果: 当分析耳蜗模型自动预测NCT时,平均绝对误差为2.6 ± 1.6mm,只有27% (3/11) 的样本误差在 ± 1.5mm的临床可接受范围内。当基于sr-pci数据手动指定NCT时,平均绝对误差降至1.0 ± 0.6mm,73% (8/11) 的样品具有临床可接受的误差。 结论: 文献中引入的3D分析耳蜗模型在模拟个体耳蜗的3D几何形状方面是有效的,但是需要调整NCT估计。

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影响因子:2.98
发表时间:2020-01-01
DOI:10.1136/neurintsurg-2019-014962
作者列表:["Guo W","Liu H","Tan Z","Zhang X","Gao J","Zhang L","Guo H","Bai H","Cui W","Liu X","Wu X","Luo J","Qu Y"]

METHODS:BACKGROUND:The main surgical techniques for spontaneous basal ganglia hemorrhage include stereotactic aspiration, endoscopic aspiration, and craniotomy. However, credible evidence is still needed to validate the effect of these techniques. OBJECTIVE:To explore the long-term outcomes of the three surgical techniques in the treatment of spontaneous basal ganglia hemorrhage. METHODS:Five hundred and sixteen patients with spontaneous basal ganglia hemorrhage who received stereotactic aspiration, endoscopic aspiration, or craniotomy were reviewed retrospectively. Six-month mortality and the modified Rankin Scale score were the primary and secondary outcomes, respectively. A multivariate logistic regression model was used to assess the effects of different surgical techniques on patient outcomes. RESULTS:For the entire cohort, the 6-month mortality in the endoscopic aspiration group was significantly lower than that in the stereotactic aspiration group (odds ratio (OR) 4.280, 95% CI 2.186 to 8.380); the 6-month mortality in the endoscopic aspiration group was lower than that in the craniotomy group, but the difference was not significant (OR=1.930, 95% CI 0.835 to 4.465). A further subgroup analysis was stratified by hematoma volume. The mortality in the endoscopic aspiration group was significantly lower than in the stereotactic aspiration group in the medium (≥40-<80 mL) (OR=2.438, 95% CI 1.101 to 5.402) and large hematoma subgroup (≥80 mL) (OR=66.532, 95% CI 6.345 to 697.675). Compared with the endoscopic aspiration group, a trend towards increased mortality was observed in the large hematoma subgroup of the craniotomy group (OR=8.721, 95% CI 0.933 to 81.551). CONCLUSION:Endoscopic aspiration can decrease the 6-month mortality of spontaneous basal ganglia hemorrhage, especially in patients with a hematoma volume ≥40 mL.

影响因子:0.96
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DOI:10.1002/jcu.22762
作者列表:["Meng L","Zhao D","Yang Z","Wang B"]

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