Effect of image magnification of digitized bitewing radiographs on approximal caries detection: an in vitro study

Dento Maxillo Facial Radiology
A MøystadH G Gröndahl

Abstract

To evaluate whether or not image magnification of digitized bitewing radiographs had an effect on approximal caries detection. Twenty general dental practitioners (GDPs) rated a total of 140 digital images (28 approximal surfaces at five different magnifications, x3, x6, x12, x18 and x30) for caries on a 5-point confidence scale. The observations were compared with the state of the approximal surfaces on visual inspection. For each GDP the average response rate was calculated. Paired t-tests were used to compare the diagnostic response at the five different image magnifications. The mean response rates obtained at x18 and x30 magnifications were significantly inferior to those at the three smaller magnifications (p < 0.007). Digital image magnification has a significant influence on observer performance in the detection of approximal caries, with an upper limit beyond which diagnostic accuracy may be reduced. Further research is needed to determine limits for various different diagnostic tasks so as to give GDPs guidelines on the appropriate magnifications to use.

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Citations

May 31, 2007·Dento Maxillo Facial Radiology·W E R BerkhoutP F van der Stelt
Mar 22, 2006·Dento Maxillo Facial Radiology·A FidlerU Skaleric
Apr 19, 2006·Dento Maxillo Facial Radiology·J A N D de MoraisG Scaf
Nov 10, 2004·Dento Maxillo Facial Radiology·S KositbowornchaiN Sooksuntisakoonchai
Sep 19, 2003·Dento Maxillo Facial Radiology·R HaakM Hellmich
Apr 9, 2004·Dento Maxillo Facial Radiology·A KünzelJ Becker
Jun 27, 2006·Dento Maxillo Facial Radiology·S PrapayasatokS Pramojanee
Aug 13, 2011·Dento Maxillo Facial Radiology·C R G XavierA L A Capelozza
May 1, 2007·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Ulrich Grassl, Ralf Kurt Willy Schulze
Sep 10, 2005·Dental Clinics of North America·Jie Yang, Vinicius Dutra
Mar 26, 2003·International Dental Journal·A H ForgieN B Pitts
Jun 7, 2012·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Werner H ShintakuJaqueline S Venturin
Mar 3, 1998·Dento Maxillo Facial Radiology·A Wenzel
Mar 1, 2005·Journal of Applied Oral Science : Revista FOB·Mitsuru OgataGulnara Scaf
May 30, 2006·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Yuichi HaraseTomohiro Okano
Oct 7, 2011·Imaging Science in Dentistry·Young-Seok ParkSeung-Pyo Lee
Aug 4, 2001·The Bulletin of Tokyo Dental College·M Wakoh, K Kuroyanagi
Jul 18, 2002·European Journal of Oral Sciences·Ann WenzelSimon Kold
May 20, 2003·Dental Traumatology : Official Publication of International Association for Dental Traumatology·Suwadee KositbowornchaiBandit Thinkhamrop

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