Changing from analog to digital images: does it affect the accuracy of alignment measurements of the lower extremity?
Acta Orthop
; 82(3): 351-5, 2011 Jun.
Article
em En
| MEDLINE
| ID: mdl-21619504
ABSTRACT
BACKGROUND AND PURPOSE:
Medical imaging has changed from analog films to digital media. We examined and compared the accuracy of orthopedic measurements using different media.METHODS:
Before knee arthroplasty, full-length standing radiographs of 52 legs were obtained. The mechanical axis (MA), tibio-femoral angle (TFA), and femur angle (FA) were measured and analyzed twice, by 2 radiologists, using (1) true-size films, (2) short films, (3) a digital high-resolution workstation, and (4) a web-based personal computer. The agreement between the 4 media was evaluated using the Bland-Altman method (limits of agreement) using the true-size films as a reference standard.RESULTS:
The mean differences in measurements between the traditional true-size films and the 3 other methods were small for MA -0.20 to 0.07 degrees, and for TFA -0.02 to 0.18 degrees. Also, the limits of agreement between the traditional true-size films and the three other methods were small.INTERPRETATION:
The agreement of the alignment measurements across the 4 different media was good. Orthopedic angles can be measured as accurately from analog films as from digital screens, regardless of film or monitor size.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Processamento de Imagem Assistida por Computador
/
Mau Alinhamento Ósseo
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Artroplastia do Joelho
/
Extremidade Inferior
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Acta Orthop
Assunto da revista:
ORTOPEDIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Finlândia