How to evaluate three dimensional angle error from plain radiographs

Chen Kun Liaw, Tai Yin Wu, Sheng Mou Hou, Rong Sen Yang, Chiou Shann Fuh

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Evaluating three-dimensional angle error is necessary because we cannot get every patient's CT or MRI at all times. Creating a method that can calculate angle error from plain radiographs is therefore important. Using vector and trigonometric mathematics, we gradually deduct our formula which can calculate angle error from goal angles (the angles we plan to achieve before operation) to result angles (the angles we get after operation) by two perpendicular radiographs. We also encode it into Micorsoft Excel (Redmond Campus, Redmond, Washington, U.S.) so that it becomes more user-friendly. We hope this tool can be used when evaluating TKR, corrective osteotomy, fracture fixation, and so on.

Original languageEnglish
Pages (from-to)1788-1790
Number of pages3
JournalJournal of Arthroplasty
Issue number10
Publication statusPublished - Dec 1 2013
Externally publishedYes


  • Plain radiograph
  • Three dimensional angle
  • Two dimensional angle

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


Dive into the research topics of 'How to evaluate three dimensional angle error from plain radiographs'. Together they form a unique fingerprint.

Cite this