Computerized Measurement on Angular Parameters for Hallux Valgus: Comparison of 100% and 150% Magnified Digital Radiography.
- Author:
Il Hoon SUNG
1
;
Doo Yeon LEE
;
Chang Ho SUNG
;
Woo Young SEO
Author Information
1. Department of Orthopaedic Surgery, Hanyang University College of Medicine, Seoul, Korea. sungih@hanyang.ac.kr
- Publication Type:Original Article
- Keywords:
Hallux valgus;
Angular parameters;
Computerized measurement
- MeSH:
Azasteroids;
Dihydrotestosterone;
Foot;
Hallux;
Hallux Valgus;
Humans;
Metatarsal Bones;
Radiographic Image Enhancement;
Software
- From:Journal of Korean Foot and Ankle Society
2012;16(1):53-57
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To study computerized measurements of angular parameters on 100% and 150% resized digital radiography of hallux valgus deformity. MATERIALS AND METHODS: 30 digital radiography of standing foot anteroposterior view of hallux valgus patients were included. Two observers(A, B) independently measured hallux valgus angle (HVA), 1-2 intermetatarsal angle (IMA), and distal metatarsal articular angle (DMAA) in two times on both 100%-size and 150% magnified images respectively, using computerized measurement software tools. The results were interpreted with the statistical software program, Statistical Analysis System, version 9.2. RESULTS: In repeated measurements of each observer, measurements on 150% magnified image showed no differences of all three parameters and with 100%-size image, there were differences of HVA (observer A) and 1-2 IMA (observer B) (p>0.05). When testing interobserver reliability, both observers showed differences in measurement of HVA and DMAA (p<0.05), but no differences in measurement of 1-2 IMA in both images. Within the 95% confidence interval, limits of error of measurements between two observers on HVA, IMA and DMAA were 2.7degrees 1.4degrees and 5.0degrees respectively in 100%-size images, and 2.6degrees, 1.6degrees and 4.7degrees respectively in 150% magnified images. CONCLUSION: In computerized measurements for angular parameters of hallux valgus with digital radiography, 150% magnified images showed intraobserver reliability. Both 100% and 150% magnified images failed to show interobserver reliability. Measurement of 1-2 IMA in both 100% and 150% images showed less interobserver error.
