术后人工耳蜗植入评估的容积再现平板 CT 融合。

Merged Volume Rendered Flat-panel Computed Tomography for Postoperative Cochlear Implant Assessment.

机构信息

Department of Neuroradiology, University of Erlangen-Nuremberg, Schwabachanlage 6, 91054, Erlangen, Germany.

Department of Otorhinolaryngology, Head and Neck Surgery, University of Erlangen-Nuremberg, Waldstraße 1, 91054, Erlangen, Germany.

出版信息

Clin Neuroradiol. 2020 Dec;30(4):721-728. doi: 10.1007/s00062-019-00832-x. Epub 2019 Sep 5.

DOI:10.1007/s00062-019-00832-x

PMID:31489450

Abstract

PURPOSE

Evaluation of a new postprocessing method for postoperative control of cochlear implants (CI) based on a single flat detector computed tomography (FD-CT) run and volume rendering of 3D models of the inner ear.

METHODS

The FD-CT datasets of CIs were selected and postprocessed to generate both standard multiplanar reconstructions (MPR) and merged volume-rendered 3D datasets (MRD) of the CIs. The MRDs consisted of two different reconstructions (bone/implant) that are automatically layered to avoid manual coregistration inaccuracy. Corresponding datasets were evaluated in consensus reading in terms of qualitative (integrity, position, configuration) and quantitative (insertion depth angle) CI parameters.

RESULTS

In total 20 FD-CTs with 20 CIs were successfully postprocessed. Qualitative evaluation of MPR and MRD demonstrated complete congruency (integrity: n = 20; position: n = 13, n = 7; configuration: n = 16, n = 3, n = 1). Adverse intracochlear implant spiralization was identified in all 10 cases with MRD and MPR. Measurement of the insertion depth angle in MRD was equivalent to that in MPR (r = 0.99; P = <0.0001).

CONCLUSION

The use of MRD is a helpful method for precise postoperative CI assessment and provides easy detection of incorrect intracochlear spiralization.

摘要

目的

评估一种新的基于单平面探测器 CT（FD-CT）运行和内耳 3D 模型容积渲染的耳蜗植入物（CI）术后控制的后处理方法。

方法

选择 CI 的 FD-CT 数据集并进行后处理，以生成 CI 的标准多平面重建（MPR）和合并的容积渲染 3D 数据集（MRD）。MRD 由两种不同的重建（骨/植入物）组成，自动分层以避免手动配准不准确。通过共识阅读对相应数据集进行评估，评估内容包括 CI 参数的定性（完整性、位置、形态）和定量（插入深度角度）。

结果

共成功后处理了 20 个 FD-CT 和 20 个 CI。MPR 和 MRD 的定性评估显示完全一致（完整性：n=20；位置：n=13，n=7；形态：n=16，n=3，n=1）。MRD 和 MPR 均可识别所有 10 例 CI 内螺旋化不良。MRD 中插入深度角度的测量与 MPR 相同（r=0.99；P<0.0001）。