Unenhanced computed tomography for normal appendix detection: comparison of low-dose with statistical iterative reconstruction and regular-dose with filtered back projection

Clin Imaging. 2017 May-Jun:43:117-121. doi: 10.1016/j.clinimag.2017.02.010. Epub 2017 Mar 1.

Abstract

Purpose: To evaluate the differences in visualization of a normal appendix between regular-dose (RD) and low-dose (LD) unenhanced CT.

Material and methods: 179 patients underwent both RDCT and LDCT for urolithiasis. Two reviewers evaluated the appendiceal visualization on a three-point scale. Sensitivities and interobserver agreement were measured.

Results: There were no significant differences between RDCT and LDCT in sensitivity, regardless of the reviewer. Interobserver agreement was excellent in both RDCT and LDCT.

Conclusion: Unenhanced LDCT is a good tool for detecting a normal appendix and is also useful for less experienced interpreters who are unfamiliar with using LDCT images.

Keywords: Appendicitis; Appendix; Iterative reconstruction; Low-dose computed tomography; Radiation exposure.

Publication types

  • Evaluation Study

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Appendicitis / diagnosis*
  • Appendicitis / diagnostic imaging
  • Appendix / diagnostic imaging*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Radiation Dosage*
  • Radiographic Image Interpretation, Computer-Assisted / methods
  • Radionuclide Imaging
  • Reference Values
  • Tomography, X-Ray Computed / methods*
  • Urolithiasis / diagnosis
  • Urolithiasis / diagnostic imaging
  • Young Adult