Assessing angulation on digital images of radiographs of fractures of the distal radius: visual estimation versus computer software measurement
We assessed the reliability of visual estimation of angles on computer images of radiographs, and compared their accuracy with the measurement of angles using computer software for ten distal radius fractures. We asked 73 clinicians to visually estimate the dorsal angulation on ten computerized radi...
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| Veröffentlicht in: | The Journal of hand surgery, European volume European volume, 2011-03, Vol.36 (3), p.230-235 |
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| container_title | The Journal of hand surgery, European volume |
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| creator | Robertson, G. A. J. Robertson, B. F. M. Thomas, B. McEachan, J. Davidson, D. M. |
| description | We assessed the reliability of visual estimation of angles on computer images of radiographs, and compared their accuracy with the measurement of angles using computer software for ten distal radius fractures. We asked 73 clinicians to visually estimate the dorsal angulation on ten computerized radiographs of fractures of the distal radius. The reliability of these estimations was calculated. Their accuracy was compared to a ‘gold standard’ obtained by consensus agreement between three consultants measuring these angles using the software. Inter-observer reliability was calculated as ICC = 0.51 and intra-observer reliability as r = 0.76. The visual estimations were less accurate with a mean percentage error of 31% (range, 7–83%). As angulation increased the estimation accuracy improved. Although reliability and accuracy of such estimation was better for clinicians with greater experience, actual measurement was more reliable and accurate. |
| doi_str_mv | 10.1177/1753193410391361 |
| format | Article |
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A. J.</creatorcontrib><creatorcontrib>Robertson, B. F. M.</creatorcontrib><creatorcontrib>Thomas, B.</creatorcontrib><creatorcontrib>McEachan, J.</creatorcontrib><creatorcontrib>Davidson, D. M.</creatorcontrib><title>Assessing angulation on digital images of radiographs of fractures of the distal radius: visual estimation versus computer software measurement</title><title>The Journal of hand surgery, European volume</title><addtitle>J Hand Surg Eur Vol</addtitle><description>We assessed the reliability of visual estimation of angles on computer images of radiographs, and compared their accuracy with the measurement of angles using computer software for ten distal radius fractures. We asked 73 clinicians to visually estimate the dorsal angulation on ten computerized radiographs of fractures of the distal radius. The reliability of these estimations was calculated. Their accuracy was compared to a ‘gold standard’ obtained by consensus agreement between three consultants measuring these angles using the software. Inter-observer reliability was calculated as ICC = 0.51 and intra-observer reliability as r = 0.76. The visual estimations were less accurate with a mean percentage error of 31% (range, 7–83%). As angulation increased the estimation accuracy improved. Although reliability and accuracy of such estimation was better for clinicians with greater experience, actual measurement was more reliable and accurate.</description><subject>Biological and medical sciences</subject><subject>Body Weights and Measures</subject><subject>Clinical Competence</subject><subject>Diseases of the osteoarticular system</subject><subject>Emergency Service, Hospital</subject><subject>Female</subject><subject>Humans</subject><subject>Injuries of the limb. Injuries of the spine</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Observer Variation</subject><subject>Orthopedics</subject><subject>Radiographic Image Interpretation, Computer-Assisted</subject><subject>Radius Fractures - diagnostic imaging</subject><subject>Reproducibility of Results</subject><subject>Traumas. 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Diseases due to physical agents</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Robertson, G. A. J.</creatorcontrib><creatorcontrib>Robertson, B. F. M.</creatorcontrib><creatorcontrib>Thomas, B.</creatorcontrib><creatorcontrib>McEachan, J.</creatorcontrib><creatorcontrib>Davidson, D. M.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>The Journal of hand surgery, European volume</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Robertson, G. A. J.</au><au>Robertson, B. F. M.</au><au>Thomas, B.</au><au>McEachan, J.</au><au>Davidson, D. M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Assessing angulation on digital images of radiographs of fractures of the distal radius: visual estimation versus computer software measurement</atitle><jtitle>The Journal of hand surgery, European volume</jtitle><addtitle>J Hand Surg Eur Vol</addtitle><date>2011-03-01</date><risdate>2011</risdate><volume>36</volume><issue>3</issue><spage>230</spage><epage>235</epage><pages>230-235</pages><issn>1753-1934</issn><eissn>2043-6289</eissn><abstract>We assessed the reliability of visual estimation of angles on computer images of radiographs, and compared their accuracy with the measurement of angles using computer software for ten distal radius fractures. We asked 73 clinicians to visually estimate the dorsal angulation on ten computerized radiographs of fractures of the distal radius. The reliability of these estimations was calculated. 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| subjects | Biological and medical sciences Body Weights and Measures Clinical Competence Diseases of the osteoarticular system Emergency Service, Hospital Female Humans Injuries of the limb. Injuries of the spine Male Medical sciences Observer Variation Orthopedics Radiographic Image Interpretation, Computer-Assisted Radius Fractures - diagnostic imaging Reproducibility of Results Traumas. Diseases due to physical agents |
| title | Assessing angulation on digital images of radiographs of fractures of the distal radius: visual estimation versus computer software measurement |
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