Department of Traumatology and orthopedic surgery, Klinikum Nürnberg, Breslauer Straße 201, 90471, Nuremberg, Germany.
Departement of Pediatrics, Klinikum Kempten, Robert-Weixler-Straße 50, 88439, Kempten, Germany.
Int J Comput Assist Radiol Surg. 2018 Mar;13(3):471-478. doi: 10.1007/s11548-018-1705-y. Epub 2018 Jan 24.
Currently, intraoperative ultrasound in brain tumor surgery is a rapidly propagating option in imaging technology. We examined the accuracy and resolution limits of different ultrasound probes and the influence of 3D-reconstruction in a phantom and compared these results to MRI in an intraoperative setting (iMRI).
An agarose gel phantom with predefined gel targets was examined with iMRI, a sector (SUS) and a linear (LUS) array probe with two-dimensional images. Additionally, 3D-reconstructed sweeps in perpendicular directions were made of every target with both probes, resulting in 392 measurements. Statistical calculations were performed, and comparative boxplots were generated.
Every measurement of iMRI and LUS was more precise than SUS, while there was no apparent difference in height of iMRI and 3D-reconstructed LUS. Measurements with 3D-reconstructed LUS were always more accurate than in 2D-LUS, while 3D-reconstruction of SUS showed nearly no differences to 2D-SUS in some measurements. We found correlations of 3D-reconstructed SUS and LUS length and width measurements with 2D results in the same image orientation.
LUS provides an accuracy and resolution comparable to iMRI, while SUS is less exact than LUS and iMRI. 3D-reconstruction showed the potential to distinctly improve accuracy and resolution of ultrasound images, although there is a strong correlation with the sweep direction during data acquisition.
目前，术中超声在脑肿瘤手术中是一种快速发展的成像技术选择。我们研究了不同超声探头的准确性和分辨率限制，以及在体像（iMRI）中 3D 重建的影响，并将这些结果与术中磁共振成像（iMRI）进行了比较。
使用 iMRI、扇形（SUS）和线性（LUS）阵列探头对具有预设凝胶目标的琼脂糖凝胶体模进行二维图像检查。此外，使用两种探头对每个目标进行了垂直方向的 3D 重建扫描，共进行了 392 次测量。进行了统计计算，并生成了比较箱线图。
iMRI 和 LUS 的每次测量都比 SUS 更精确，而 iMRI 和 3D 重建 LUS 的高度没有明显差异。3D 重建 LUS 的测量结果始终比 2D-LUS 更准确，而 SUS 的 3D 重建在某些测量中几乎与 2D-SUS 没有差异。我们发现 3D 重建 SUS 和 LUS 的长度和宽度测量值与同图像方向的 2D 结果之间存在相关性。
LUS 提供了与 iMRI 相当的准确性和分辨率，而 SUS 不如 LUS 和 iMRI 精确。3D 重建显示出明显提高超声图像准确性和分辨率的潜力，尽管在数据采集过程中与扫描方向存在很强的相关性。
