![two types of grids in radiology two types of grids in radiology](https://www.upstate.edu/radiology/images/education/rsna/radiography/artifact/index_clip_image002_0007.jpg)
A grid is used routinely during x-ray exposure to remove undesired scattered x-rays.
![two types of grids in radiology two types of grids in radiology](https://image2.slideserve.com/4536159/advantages-disadvantages-l.jpg)
These artifacts are inherent problems with the computed radiographic (CR) imaging system. However, there are other types of artifacts, such as grid artifacts and moiré patterns, that are not caused by operator error. In a study by Cesar et al., 1 the authors presented a detailed discussion that focused on some artifacts that were caused by operator error. Digital images are easier to store and transfer from one place to another. In a PACS system, the clinical images are presented in digital form. The picture archiving and communication system (PACS) has become a hospital standard.
![two types of grids in radiology two types of grids in radiology](https://imjustcreative.com/wp-content/uploads/2020/01/Univers-Type-Specimen-Sheets-Designed-in-1957-by-Adrian-Frutiger-1-scaled.jpg)
When comparing the results obtained from the proposed method against the results obtained using previous computer methods, we show that our method can achieve better image quality. The frequency can be determined, accurately located, and thus removed from the frequency domain. We show that the grid artifacts occur in a narrow band of frequency in the frequency domain. In this paper, the formation of the artifacts is studied. Images produced using a grid with higher frequency or a Potter–Bucky grid (i.e., a moving grid, Bucky for short) can reduce occurrence but cannot guarantee elimination of these artifacts. These artifacts become a more serious problem when viewing CR images on a computer monitor when a clinic grade monitor is not available. Unfortunately, grid artifacts and moiré pattern artifacts may be present in CR images. Another important advantage is that CR images generally have a wider dynamic range than conventional screen film. Furthermore, it is easier to integrate with the picture archiving and communication systems. Computed radiography (CR) has many advantages such as filmless operations, efficiency, and convenience.