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首页> 外文会议>Medical Imaging 1999: Image Display >PC-based system for 3D registration of ultrasound and magnetic resonance images based on a magetic position sensor
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PC-based system for 3D registration of ultrasound and magnetic resonance images based on a magetic position sensor

机译：基于PC的系统，基于磁性位置传感器对超声和磁共振图像进行3D配准

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Abstract: Stereotactic systems are based on preoperative tomographic images for assisting neurosurgeons to accurately guide the surgical tool into the brain. In addition, intraoperative ultrasound (US) images are used to monitor the brain in real time during the surgical procedure. The main disadvantage of stereotactic system is that preoperative images can become outdated during the course of the surgery. The main disadvantage of intraoperative US is the low signal-to-noise ratio that prevents the surgeon from appreciating the contents and orientation of the US images. A system that combines preoperative tomographic with intraoperative US imags could overcome the above-mentioned disadvantages. We have successfully developed and implemented a new PC-based system for interactive 3D registration of US and magnetic resonance images. Our software is written in Microsoft Visual C$PLU$PLU and it runs on a Pentium II 450-MHz PC. We have performed an extensive analysis of the errors of our system with a custom-built phantom. The registration error between US and MR space was dependent on the depth of the target within the US image. For a 3.5-MHz phased 1D array transducer and a depth of 6 cm, the mean value of the registration error was 2.00 mm and the standard deviation was 0.75 mm. The registered MR images were reconstructed using either zero-order or first-order interpolation. The interactive nature of our system demonstrates its potential to be used in the operating room. !21
机译：摘要：立体定向系统基于术前断层图像，可帮助神经外科医师将手术工具准确地引导到大脑中。此外，术中超声（US）图像用于在手术过程中实时监控大脑。立体定向系统的主要缺点是术前图像在手术过程中可能会过时。术中超声的主要缺点是信噪比低，这阻止了外科医生欣赏超声图像的内容和方向。将术前断层扫描与术中超声成像相结合的系统可以克服上述缺点。我们已经成功开发并实施了一种新的基于PC的系统，用于US和磁共振图像的交互式3D配准。我们的软件使用Microsoft Visual C $ PLU $ PLU编写，可在奔腾II 450 MHz PC上运行。我们使用定制的模型对系统的错误进行了广泛的分析。 US和MR空间之间的配准误差取决于US图像内目标的深度。对于3.5 MHz相控1D阵列换能器和6 cm深度，配准误差的平均值为2.00 mm，标准偏差为0.75 mm。使用零阶或一阶插值重建已注册的MR图像。我们系统的交互性质证明了其在手术室中使用的潜力。 ！21

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