RT Journal
A1 Patel, Sanjay R.
A1 Toms, Andoni P.
A1 Rehman, Javed M.
A1 Wimhurst, James
T1 A Reliability Study of Measurement Tools Available on Standard Picture Archiving and Communication System Workstations for the Evaluation of Hip Radiographs Following Arthroplasty
JF The Journal of Bone & Joint Surgery
JO The Journal of Bone & Joint Surgery
YR 2011
FD September 21
VO 93
IS 18
SP 1712
OP 1719
DO 10.2106/JBJS.J.00709
UL http://dx.doi.org/10.2106/JBJS.J.00709
AB Background: 
  Conventional radiography is the primary imaging tool for routine follow-up of total hip replacements, but the reliability of this method has been questioned. The aim of this study was to assess the reliability of commonly used measurements of the position of hip prostheses on postoperative radiographs with use of tools available on all standard picture archiving and communication system workstations.Methods: 
  Fifty anteroposterior pelvic and lateral hip radiographs that were made after a unilateral total hip arthroplasty were included in this study. Acetabular inclination, lateral offset, lower-limb length, center of rotation, and femoral stem angle were independently assessed by two observers. Intraclass correlation coefficients were calculated for each measurement.Results: 
  The results demonstrated excellent reliability for acetabular angle (r = 0.95), lower-limb length (r = 0.91), and lateral offset (r = 0.95) measurements and good reliability for center of rotation (r = 0.73) and lateral femoral stem angle (r = 0.68) measurements.Conclusions: 
  The position of total hip replacements can be reliably assessed with use of simple electronic tools and standard radiology workstations.Clinical Relevance: 
  Simple electronic tools on picture archiving and communication system workstations can be reliably used to measure alignment of total hip replacement prostheses at routine work stations. These measurements are reproducible and may avoid the need for expensive software and templates.