CT scan parameters and radiation dose: Practical advice for radiologists

Siva P. Raman, Mahadevappa Mahesh, Robert V. Blasko, Elliot K. Fishman

Research output: Contribution to journalArticle

Abstract

Although there has been increasing recognition of the importance of reducing radiation dose when performing multidetector CT examinations, the increasing complexity of CT scanner technology, as well as confusion about the importance of many different CT scan parameters, has served as an impediment to radiologists seeking to create lower dose protocols. The authors seek to guide radiologists through the manipulation of 8 fundamental CT scan parameters that can be altered or optimized to reduce patient radiation dose, including detector configuration, tube current, tube potential, reconstruction algorithm, patient positioning, scan range, reconstructed slice thickness, and pitch. Although there is always an inherent trade-off between image quality or noise and patient radiation dose, in many cases, a reasoned manipulation of these 8 parameters can allow the safer imaging of patients (with lower dose) while preserving diagnostic image quality.

Original languageEnglish (US)
Pages (from-to)840-846
Number of pages7
JournalJournal of the American College of Radiology
Volume10
Issue number11
DOIs
StatePublished - Nov 2013

Keywords

  • Radiation dose
  • automated tube current modulation
  • iterative reconstruction
  • low kVp
  • pitch

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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