OBJECTIVE: To determine how Larsen scores from digitized X-rays compare to those from film originals. METHODS: A hundred sets of radiographs of patients recruited with early rheumatoid arthritis (RA) were assessed using the Larsen scoring system. Digitized copies of these sets were then viewed on a computer screen and scored according to Larsen in a random order. The quality of the digitized image was also recorded. For each set of X-rays, the signed difference between the score from film and the score from the digitized images was calculated. RESULTS: A total of 95% of the digitized X-ray sets were scored successfully; 5% were not scored due to the images being unreadable. The mean difference between the two sets of scores was -1.2 (95% CI [-2.06, -0.37]). There was no trend in the difference with respect to the mean of the two scores (P>0.1). CONCLUSION: The Larsen scoring of digitized X-ray images has been validated.
OBJECTIVE: To determine how Larsen scores from digitized X-rays compare to those from film originals. METHODS: A hundred sets of radiographs of patients recruited with early rheumatoid arthritis (RA) were assessed using the Larsen scoring system. Digitized copies of these sets were then viewed on a computer screen and scored according to Larsen in a random order. The quality of the digitized image was also recorded. For each set of X-rays, the signed difference between the score from film and the score from the digitized images was calculated. RESULTS: A total of 95% of the digitized X-ray sets were scored successfully; 5% were not scored due to the images being unreadable. The mean difference between the two sets of scores was -1.2 (95% CI [-2.06, -0.37]). There was no trend in the difference with respect to the mean of the two scores (P>0.1). CONCLUSION: The Larsen scoring of digitized X-ray images has been validated.
Authors: Michael R Backhouse; Anne-Maree Keenan; Elizabeth M A Hensor; Adam Young; David James; Josh Dixey; Peter Williams; Peter Prouse; Andrew Gough; Philip S Helliwell; Anthony C Redmond Journal: Rheumatology (Oxford) Date: 2011-04-18 Impact factor: 7.580
Authors: Elizabeth M A Hensor; Paul McKeigue; Stephanie F Ling; Marco Colombo; Jennifer H Barrett; Jackie L Nam; Jane Freeston; Maya H Buch; Athina Spiliopoulou; Felix Agakov; Stephen Kelly; Myles J Lewis; Suzanne M M Verstappen; Alexander J MacGregor; Sebastien Viatte; Anne Barton; Costantino Pitzalis; Paul Emery; Philip G Conaghan; Ann W Morgan Journal: Rheumatology (Oxford) Date: 2019-03-01 Impact factor: 7.580
Authors: Sebastien Viatte; Darren Plant; Buhm Han; Bo Fu; Annie Yarwood; Wendy Thomson; Deborah P M Symmons; Jane Worthington; Adam Young; Kimme L Hyrich; Ann W Morgan; Anthony G Wilson; John D Isaacs; Soumya Raychaudhuri; Anne Barton Journal: JAMA Date: 2015-04-28 Impact factor: 56.272