Comparison of PACS and hard-copy 51-inch radiographs for measuring leg length and deformity. Academic Article Article uri icon

Overview

MeSH

  • Humans
  • New York City
  • Observer Variation
  • Predictive Value of Tests
  • Radiographic Image Interpretation, Computer-Assisted
  • Reproducibility of Results
  • Retrospective Studies

MeSH Major

  • Leg Length Inequality
  • Lower Extremity Deformities, Congenital
  • Radiology Information Systems
  • X-Ray Film

abstract

  • The picture archiving and communication system (PACS) eventually will replace the use of standard hard-copy radiographs. It is unknown whether measurements of limb length discrepancy (LLD) and deformity on PACS compare in accuracy and reproducibility with those from hard-copy radiographs. We compared the reproducibility and reliability of LLD and deformity measurements for each of these two media. We retrospectively reviewed 51-inch standing lower extremity images obtained for LLD or deformity analysis from 40 patients to compare the measurements and their reliability on hard-copy film with those performed on soft-copy PACS. Two observers independently performed measurements twice using each system at 1-week intervals to minimize interobserver or intraobserver bias. Intraclass correlation coefficients (ICCs) were determined to test intraobserver and interrater reliability of Rater 1 and Rater 2. Interrater reliability of measurements made on hard copy ranged from 0.69 to 0.99 and PACS-derived measurements ranged from 0.66 to 0.98. Intraobserver reliability for Rater 1 for measurements made on hard copy ranged from 0.853 to 0.999 and PACS-derived measurements ranged from 0.80 to 0.996. Intraobserver reliability for Rater 2 for measurements made on hard copy ranged from 0.931 to 0.999 and PACS-derived measurements ranged from 0.962 to 0.999. Each system yielded comparable reliability for measurements, therefore, transition to PACS to perform measurements in patients with LLD or deformity can be made with confidence. Level III, diagnostic study. See the Guidelines for Authors for a complete description of levels of evidence.

publication date

  • January 2011

has subject area

  • Humans
  • Leg Length Inequality
  • Lower Extremity Deformities, Congenital
  • New York City
  • Observer Variation
  • Predictive Value of Tests
  • Radiographic Image Interpretation, Computer-Assisted
  • Radiology Information Systems
  • Reproducibility of Results
  • Retrospective Studies
  • X-Ray Film

Research

keywords

  • Comparative Study
  • Journal Article

Identity

Language

  • eng

PubMed Central ID

  • PMC3008877

Digital Object Identifier (DOI)

  • 10.1007/s11999-010-1460-z

PubMed ID

  • 20625949

Additional Document Info

start page

  • 244

end page

  • 250

volume

  • 469

number

  • 1