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首页> 美国卫生研究院文献>other >A novel Region of Interest (ROI) imaging technique for biplane imaging in interventional suites: high-resolution small field-of-view imaging in the frontal plane and dose-reduced large field-of-view standard-resolution imaging in the lateral plane
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A novel Region of Interest (ROI) imaging technique for biplane imaging in interventional suites: high-resolution small field-of-view imaging in the frontal plane and dose-reduced large field-of-view standard-resolution imaging in the lateral plane

机译：一种用于介入套件中双平面成像的新型感兴趣区域（ROI）成像技术：额叶面中的高分辨率小视场成像以及侧面中剂量降低的大视场标准分辨率成像

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Endovascular-Image-Guided-Interventional (EIGI) treatment of neuro-vascular conditions such as aneurysms, stenosed arteries, and vessel thrombosis make use of treatment devices such as stents, coils, and balloons which have very small feature sizes, 10's of microns to a few 100's of microns, and hence demand a high resolution imaging system. The current state-of-the-art flat panel detector (FPD) has about a 200-um pixel size with the Nyquist of 2.5 lp/mm. For higher-resolution imaging a charge-coupled device (CCD) based Micro-Angio -Fluoroscope (MAF-CCD) with a pixel size of 35um (Nyquist of 11 lp/mm) was developed and previously reported. Although the detector addresses the high resolution needs, the Field-Of-View (FOV) is limited to 3.5 cm × 3.5 cm, which is much smaller than current FPDs. During the use of the MAF-CCD for delicate parts of the intervention, it may be desirable to have real-time monitoring outside the MAF FOV with a low dose, and lower, but acceptable, quality image.To address this need, a novel imaging technique for biplane imaging systems has been developed, using an MAF-CCD in the frontal plane and a dose-reduced standard large FOV imager in the lateral plane. The dose reduction is achieved by using a combination of ROI fluoroscopy and spatially different temporal filtering, a technique that has been previously presented.In order to evaluate this technique, a simulation using images acquired during an actual EIGI treatment on a patient, followed by an actual implementation on phantoms is presented.
机译：血管内图像引导介入（EIGI）治疗神经血管疾病（如动脉瘤，狭窄的动脉和血管血栓形成）使用的治疗装置（如支架，线圈和球囊）的特征尺寸非常小，只有10微米至几百个微米，因此需要高分辨率成像系统。当前最先进的平板检测器（FPD）的像素大小约为200 um，奈奎斯特（Nyquist）为2.5 lp / mm。对于更高分辨率的成像，已开发并先前报道了基于电荷耦合器件（CCD）的微尺寸荧光镜（MAF-CCD），像素尺寸为35um（奈奎斯特为11 lp / mm）。尽管检测器满足了高分辨率需求，但视场（FOV）限制为3.5 cm×3.5 cm，这比当前的FPD小得多。在将MAF-CCD用于干预的敏感部位时，可能需要在MAF FOV之外进行实时监测，以低剂量，较低但可以接受的高质量图像进行处理。已经开发了用于双平面成像系统的成像技术，该技术在前平面使用MAF-CCD，在侧平面使用剂量降低的标准大型FOV成像器。通过结合使用ROI荧光检查和空间不同的时间过滤（以前已经提出过的一种技术）来实现剂量减少。为了评估该技术，需要使用对患者进行实际EIGI治疗期间获得的图像进行模拟，然后再进行介绍了幻影的实际实现。

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