![paraview projected area paraview projected area](https://www.geologypage.com/wp-content/uploads/2018/03/Sinking-land-will-exacerbate-flooding-GeologyPage.jpg)
The download address of the source code is: The latest stable version released by ParaView is 5.0. Since the source code of the project needs to be modified to achieve the required functions, the first step is to compile the source code of ParaView. 2.1 Obtain and compile ParaView5.0 source code The following are the specific implementation steps. However, this property does not provide options that can be modified directly in the ParaView interface.īy searching for related solutions on the Internet, combined with the analysis of the source code of ParaView, finally by adding a public function, setBlendMode () to the vtkImageVolumeRepresentation class of ParaView, and then through this function to change its internal protect type member variable vtkSmartVolumeMapper blendMode The attribute value realizes the function of MIP. Then, unlike MPR, MIP is a different raycasting method, which belongs to a blendMode attribute of Mapper. The adjustment of MPR is mainly to use the Slicer filter in ParaView to cut the original volume data in different directions, and then display the cut two-dimensional image on the interface to show the effect. Realize the adjustment of MIP in ParaView MIP imaging is used routinely by physicians in interpreting Positron Emission Tomography (PET) or Magnetic Resonance Angiography studies. Use of depth weighting during production of rotating cines of MIP images can avoid the problem of difficulty of distinguishing right from left, and clockwise vs anti-clockwise rotation. Additional information can be found in other articles by the same author. In the setting of Nuclear Medicine, it was originally called MAP (Maximum Activity Projection). MIP imaging was invented for use in Nuclear Medicine by Jerold Wallis, MD, in 1988, and subsequently published in IEEE Transactions in Medical Imaging. MIP enhances the 3D nature of these nodules, making them stand out from pulmonary bronchi and vasculature. MIP is used for the detection of lung nodules in lung cancer screening programs which utilise computed tomography scans. However, since the projection is orthographic the viewer cannot distinguish between left or right, front or back and even if the object is rotating clockwise or anti-clockwise. This helps the viewer's perception to find the relative 3D positions of the object components. To improve the sense of 3D, animations are usually rendered of several MIP frames in which the viewpoint is slightly changed from one to the other, thus creating the illusion ofrotation. This technique is computationally fast, but the 2D results do not provide a good sense of depth of the original data.
![paraview projected area paraview projected area](https://discourse.paraview.org/uploads/default/optimized/2X/e/e1f777565a5369d2dcb64f72290cfa80972524bc_2_1380x740.png)
This implies that two MIP renderings from opposite viewpoints are symmetrical images if they are rendered using orthographic projection. In scientific visualization, a maximum intensity projection (MIP) is a volume rendering method for 3D data that projects in the visualization plane thevoxels with maximum intensity that fall in the way of parallel rays traced from the viewpoint to the plane of projection. MIP can reflect the X-ray attenuation value of the corresponding pixel, and small density changes can also be displayed on the MIP image, which can well show the narrowing, dilation, filling defects of blood vessels and distinguish the calcification on the wall of the blood vessel from the comparison of the lumen of the blood vessel. Among them, along the parallel rays from the viewpoint to the projection plane, the brightness of each voxel density value will be attenuated in some way, and the voxel with the highest brightness is finally presented on the projection plane. In the three-dimensional image post-processing algorithm of medical images, in addition to MPR, there is a more common algorithm, named MIP (Maximum Intensity Projection), also known as "maximum brightness projection", which projects three-dimensional space on the visualization plane A computer visualization method of data.
![paraview projected area paraview projected area](https://pointscene.com/wp-content/uploads/2020/02/uploadpointcloud2-1200x560.png)
Then after the reorganization of the image, the doctor can more easily observe the location of the spine and its other organs Relationship. MPR is most commonly used to check the spine, because the image of the axial cut plane is only limited to show the vertebral body, and it can not fully display the intervertebral disc. In the previous technical investigation, the principle of MPR (multi-planar reconstruction) and its implementation in ParaView have been basically introduced. This article was edited by the Markdown editor.