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首页> 外文会议>Conference on Medical Imaging: Physics of Medical Imaging >Radial intensity projection for lumen: application to CT angiographic imaging
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Radial intensity projection for lumen: application to CT angiographic imaging

机译：Lumen的径向强度投影：在CT血管造影成像中的应用

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For the diagnosis of lumen, such as plaque in the coronary and polyp in the colon, it is important to create the cross sectional image of tubular organ on the basis of luminal centerline (i.e., Curved Planar Reformation: CPR). However, since each CPR image has the only limited angle information, it may overlook objects of diagnostic importance. To overcome this limitation and improve diagnostic accuracy we have developed a method called Radial Intensity Projection for lumen (RIP) to create an image based on luminal centerline that integrates all directional information. RIP is executed as follows. At first image processing is performed on array of pixel in the orthogonal direction to a luminal centerline. Secondly, this image processing is performed repeatedly in the angle direction along a luminal centerline. Finally, RIP image, which incorporates all directional information based on luminal centerline, is created. In addition to developing the RIP method for the diagnosis of soft plaque, which is considered as one of the main causes of myocardial infarction, we have also developed the profile step imaging method (PSI). This is an algorithm for visualizing a level gradient point in the radial direction, paying attention to the fact that the gradient approaches zero at the region of soft plaque. We applied RIP method to the clinical image data of a coronary angiography, which has been scanned with the multi slice CT scanner. Using RIP method, it is possible to check the existence of calcified plaque present in the surrounding of a vessel wall without changing the view angle. We have also applied PSI method to the clinical image of a coronary angiography with a soft plaque. The PSI image overlaid on RIP image enables us to verify the high possibility of existing soft plaque. Moreover, the perspectively mapped RIP image to a half pipe object allows us to grasp the orientation of plaque more easily. RIP method is also effective for extended organs, such as peripheral vascular. Using RIP image as a guide for other image processing, it is possible to improve the effectiveness of diagnosis while simplify the diagnosis.
机译：对于抑制冠状动脉和息肉中的牙龈诊断，基于腔中心线（即弯曲的平面改造：CPR），创造管状器官的横截面图像是重要的。然而，由于每个CPR图像具有唯一有限的角度信息，因此它可能忽略诊断重要性的对象。为了克服这种限制并提高诊断准确性，我们开发了一种称为径向强度投影的方法，用于漏洞（RIP），以创建基于集成所有方向信息的漏洞中心线的图像。 RIP如下执行。在第一图像处理时，在垂直方向上的像素阵列上执行到腔中心线。其次，该图像处理沿着腔中心线在角度方向上重复执行。最后，创建了rip图像，它包含基于腔中心线的所有定向信息。除了开发诊断软斑的曲折方法外，被认为是心肌梗死的主要原因之一，我们还开发了轮廓步骤成像方法（PSI）。这是一种用于可视化径向方向上的电平梯度点的算法，注意梯度在软斑块区域处偏振的事实。我们将RIP方法应用于冠状动脉血管造影的临床图像数据，这已被多切片CT扫描仪扫描。使用RIP方法，可以检查血管壁周围存在的钙化斑块的存在，而不改变视角。我们还将PSI方法应用于冠状动脉造影的临床形象，柔软的牙菌斑。 RIP图像上覆盖的PSI图像使我们能够验证现有软斑块的高可能性。此外，半管对象的透视映射的RIP图像允许我们更容易掌握斑块的方向。 RIP方法对于扩展器官，例如外周血管也是有效的。使用RIP图像作为其他图像处理的指南，可以提高诊断的有效性，同时简化诊断。

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