Influence of compression ratio on x ray grid artifact

Five factors affecting the artifacts of x ray grid are: x ray grid, detector, monitor, compression ratio of display and human body.
Whether the spatial resolution of the monitor is the same as that of the detector or not, the compression ratio of image size will also affect the generation of moire lines, resulting in the artifact of the x ray grid.
If the monitor’s image display resolution is 10241024 and 2048X2048’s image is displayed in fit to screen mode, the image is compressed to 1024X1024 in size, and its display spatial resolution is 1024X1024. If it is displayed at a ratio of 1:1, it is equivalent to one pixel on the screen corresponding to one detector image. At this time, the spatial resolution of the display can also be regarded as 2048 x 2048, but it can not be displayed on screen, and the compression ratio has an impact on the x ray grid.
Note: Because the size of the detector pixels may not be the same as that of the monitor, the size of the 1:1 image and the actual object will not be the same.

Author：X Ray Grids Maker