Sliding window adaptive histogram equalization of intraoral radiographs: effect on image quality

Dento Maxillo Facial Radiology
T Sund, A Møystad

Abstract

To investigate whether contrast enhancement by non-interactive, sliding window adaptive histogram equalization (SWAHE) can enhance the image quality of intraoral radiographs in the dental clinic. Three dentists read 22 periapical and 12 bitewing storage phosphor (SP) radiographs. For the periapical readings they graded the quality of the examination with regard to visually locating the root apex. For the bitewing readings they registered all occurrences of approximal caries on a confidence scale. Each reading was first done on an unprocessed radiograph ("single-view"), and then re-done with the image processed with SWAHE displayed beside the unprocessed version ("twin-view"). The processing parameters for SWAHE were the same for all the images. For the periapical examinations, twin-view was judged to raise the image quality for 52% of those cases where the single-view quality was below the maximum. For the bitewing radiographs, there was a change of caries classification (both positive and negative) with twin-view in 19% of the cases, but with only a 3% net increase in the total number of caries registrations. For both examinations interobserver variance was unaffected. Non-interactive SWAHE applied to dental SP radiographs pro...Continue Reading

References

Feb 25, 1998·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·D A TyndallM Nair
Feb 15, 2001·Dento Maxillo Facial Radiology·M Analoui
Jun 22, 2002·Dento Maxillo Facial Radiology·U WelandeW D McDavid
Jun 28, 2002·Dento Maxillo Facial Radiology·T M LehmannK Spitzer
Aug 23, 2002·International Endodontic Journal·K Nicopoulou-KarayianniN P Lang
Apr 22, 2003·IEEE Transactions on Medical Imaging·Torbjørn Sund, Karsten Eilertsen
Jun 9, 2004·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Gang Li

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Citations

Nov 26, 2011·Dento Maxillo Facial Radiology·R RaitzL P de Lima
Jul 10, 2012·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Masaru KonishiMadeleine Rohlin
Apr 5, 2014·Imaging Science in Dentistry·Jin-Woo ChoiEun-Kyung Kim
Oct 2, 2013·Imaging Science in Dentistry·Mojdeh MehdizadehNastaran Farhadi
May 11, 2019·Dento Maxillo Facial Radiology·Cinar AzimanXie-Qi Shi

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