Enabling freehand lateral scanning of optical coherence tomography needle probes with a magnetic tracking system.
Enabling freehand lateral scanning of optical coherence tomography needle probes with a magnetic tracking system.
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DOI：
10.1364/boe.3.001565
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发表时间：
2012-07-01
影响因子：
3.4
通讯作者：
Sampson DD
中科院分区：
文献类型：
--
作者：
Yeo BY;McLaughlin RA;Kirk RW;Sampson DD
我们提出了一种高分辨率的三维位置跟踪方法，允许光学相干断层扫描（OCT）针探头进行横向手动扫描，提供了高度的灵活性和自由度，在临床使用中所需的。该方法基于磁跟踪系统，该系统通过基于互相关的响应和两阶段移动窗口平均算法来增强，以提高跟踪器有限的固有空间分辨率，实现18 µm RMS位置精度。开发了一个原理验证系统，成功的图像重建显示在体模和离体人体乳腺组织上，经组织学验证。这种徒手扫描方法有助于OCT针成像的临床实施。
We present a high-resolution three-dimensional position tracking method that allows an optical coherence tomography (OCT) needle probe to be scanned laterally by hand, providing the high degree of flexibility and freedom required in clinical usage. The method is based on a magnetic tracking system, which is augmented by cross-correlation-based resampling and a two-stage moving window average algorithm to improve upon the tracker's limited intrinsic spatial resolution, achieving 18 µm RMS position accuracy. A proof-of-principle system was developed, with successful image reconstruction demonstrated on phantoms and on ex vivo human breast tissue validated against histology. This freehand scanning method could contribute toward clinical implementation of OCT needle imaging.