title: [CT colonography - evolution of methodology and indications].
abstract: BACKGROUND
  Advances in CT scanners technology and computing in 90s allowed visual reconstruction of hollow organs inner surface. This method which was mainly used for colon wall imaging had to deal with several limitations from the very first years caused by poorly developed methodology of colonic preparation and distension as well as high radiation exposure.
  
  
  METHODS
  Aim of the paper is to provide an overview of technical and methodological innovations that can at least partially overcome above mentioned shortcomings. Due to these changes, CT colonography became the recognized method after incomplete or impossible optical colonography. Specific patient subgroups which particularly benefit from this modality and unresolved role of the CT colonography in colorectal cancer screening are also mentioned.
  
  
  CONCLUSIONS
  CT colonography is a relatively new method that can not completely replace optical colonoscopy. Thanks to advances in technology, however, it became a valid diagnostic tool with certain advantages over other imaging or invasive methods. These benefits can be handed over to a patient when the examination is carefully indicated.
authors.affiliation: Masarykuv onkologicky ustav, Brno.
authors.forename: P
authors.initials: P
authors.lastname: Opletal
authors.forename: M
authors.initials: M
authors.lastname: Standara
mesh_terms: D023881:Colonography, Computed Tomographic / Q000379:methods*; D006801:Humans