A study of grid artifacts formation and elimination in computed radiographic images.
Computed radiography (CR) has many advantages such as filmless operations, efficiency, and convenience. Furthermore, it is easier to integrate with the picture archiving and communication systems. Another important advantage is that CR images generally have a wider dynamic range than conventional sc...
| Publicado en: | Journal of Digital Imaging Vol. 19; no. 4; pp. 351 - 362 |
|---|---|
| Autores principales: | , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Dec2006
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106200201&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106200201 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08971889 DOQ jtl: Journal of Digital Imaging issn: 08971889 maglogo: N pubinfo: dt: Dec2006 vid: 19 iid: 4 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 106200201 2009480590 NLM16763931 106200201 ppf: 351 ppct: 11 formats: fmt: @attributes: type: P tig: atl: A study of grid artifacts formation and elimination in computed radiographic images. aug: au: Lin CY Lee WJ Chen SJ Tsai CH Lee JH Chang CH Ching YT affil: Department of Computer and Information Science, National Chiao Tung University, 1001 University Rd., Hsin Chu, Taiwan, Republic of China, ytching@cis.nctu.edu.tw. sug: subj: Artifacts Phantoms, Imaging Radiographic Image Enhancement Radiography, Computed Tomography, X-Ray Computed Image Processing, Computer Assisted ab: Computed radiography (CR) has many advantages such as filmless operations, efficiency, and convenience. Furthermore, it is easier to integrate with the picture archiving and communication systems. Another important advantage is that CR images generally have a wider dynamic range than conventional screen film. Unfortunately, grid artifacts and moiré pattern artifacts may be present in CR images. These artifacts become a more serious problem when viewing CR images on a computer monitor when a clinic grade monitor is not available. 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 [CR & PACS (2000); Detrick F (2001), pp 7-8]. In this paper, the formation of the artifacts is studied. We show that the grid artifacts occur in a narrow band of frequency in the frequency domain. The frequency can be determined, accurately located, and thus removed from the frequency domain. 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. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|