A comparative analysis of coregistered ultrasound and magnetic resonance imaging in neurosurgery
A comparative analysis of coregistered ultrasound and magnetic resonance imaging in neurosurgery
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DOI：
10.1227/01.neu.0000317377.15196.45
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发表时间：
2008-03-01
期刊：
影响因子：
4.8
通讯作者：
Paulsen, Keith D.
中科院分区：
文献类型：
--
作者：
Hartov, Alex;Roberts, David W.;Paulsen, Keith D.
目的：这项工作对 35 例神经外科手术中获得的倾斜配准磁共振成像 (MRI) 扫描和超声图像进行定性和定量并排比较。 方法：记录空间配准的一系列超声图像，用于后续离线评估并与相应的术前 MRI 研究进行比较。通过直接用分段特征重新配准目标体积来减少错位程度。结果：开颅手术后目标体积的初始明显空间错位范围为0.11至8.73 mm（平均4.01 mm）。重新配准后，重叠分段特征中的互信息增加，这可能是局部对齐更好的证据。此外，通过凸包近似定量评估的特征一致性程度表明，超声体积始终小于 MRI 对应物。 结论：虽然术中超声本身很难解释，但当与术前 MRI 扫描准确配准时，其作为导航指南的潜在实用性得到增强。
OBJECTIVE: This work presents qualitative and quantitative side-by-side comparisons of oblique coregistered magnetic resonance imaging (MRI) scans and ultrasound images obtained during 35 neurosurgical procedures.METHODS: Spatially registered series of ultrasound images were recorded for subsequent off-line evaluation and comparison with corresponding preoperative MRI studies. The degree of misalignment was reduced by reregistering the target volume directly with segmented features.RESULTS: The initial apparent spatial misalignment of the target volume after craniotomy ranged from 0.11 to 8.73 mm (mean, 4.01 mm). After reregistration, the mutual information in overlapping segmented features was increased, presumably evidence of a better alignment locally. Additionally, the degree of feature congruence, which was assessed quantitatively through a convex hull approximation, demonstrated that the ultrasound volume was consistently smaller than its MRI counterpart.CONCLUSION: Although intraoperative ultrasound tends to be difficult to interpret by itself, when accurately coregistered with preoperative MRI scans, its potential utility as a navigational guide is enhanced.