Iterative Reconstruction Techniques in Abdominopelvic CT: Technical Concepts and Clinical Implementation

AJR Am J Roentgenol. 2015 Jul;205(1):W19-31. doi: 10.2214/AJR.14.13402.


Objective: This article discusses the clinical challenge of low-radiation-dose examinations, the commonly used approaches for dose optimization, and their effect on image quality. We emphasize practical aspects of the different iterative reconstruction techniques, along with their benefits, pitfalls, and clinical implementation.

Conclusion: The widespread use of CT has raised concerns about potential radiation risks, motivating diverse strategies to reduce the radiation dose associated with CT. CT manufacturers have developed alternative reconstruction algorithms intended to improve image quality on dose-optimized CT studies, mainly through noise and artifact reduction. Iterative reconstruction techniques take unique approaches to noise reduction and provide distinct strength levels or settings.

Keywords: CT; CT radiation dose; filtered back projection; image quality; iterative reconstruction.

Publication types

  • Review

MeSH terms

  • Algorithms
  • Humans
  • Radiation Dosage*
  • Radiation Protection / methods*
  • Radiographic Image Interpretation, Computer-Assisted / methods*
  • Radiography, Abdominal / methods*
  • Tomography, X-Ray Computed / methods*