Subjective image quality of digitally filtered radiographs acquired by the Dürr Vistascan system compared with conventional radiographs

Yalçınkaya, ̧Şebnem Erçalık; Künzel, Andreas; Willers, Reinhart; Thoms, M.; Becker, Jürgen

doi:10.1016/j.tripleo.2005.08.003

Cited by 47 publications

(43 citation statements)

References 24 publications

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“…8 However, so far, only a few studies have compared the effect of image filters that may enhance the quality of the panoramic image. 4,6,9 Although panoramic radiography is not the primary diagnostic yield for approximal caries diagnosis; a recent study focused on the evaluation of filters to maximize the diagnosis of approximal caries. 10 The filters enhanced the overall quality of the image but visualization of important structures that may aid in the distinction of pathology from anatomy were not considered.…”

Section: Introductionmentioning

confidence: 99%

“…However, the authors used individually designed algorithms, rather than standard and commonly used filters, for image processing, which makes their results impractical. 9 The present study was designed, therefore, to compare subjective image quality of clinical images obtained with SPP-based digital and conventional film-based panoramic systems for the visualization of various anatomical structures; and to evaluate the effect of various processing algorithms on image interpretation.…”

Section: Introductionmentioning

confidence: 99%

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Perception of anatomical structures in digitally filtered and conventional panoramic radiographs: a clinical evaluation

Baksı

Alpöz²,

Soğur³

et al. 2010

Dentomaxillofacial Radiology

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Objectives: The aims of the study were to compare subjective image quality of clinical images obtained with a storage phosphor plate (SPP)-based digital and conventional filmbased panoramic system for the visualization of various anatomical structures and to evaluate the effect of various processing algorithms on image interpretation. Methods: Panoramic radiographs were taken in 42 patients both with film and with a SPP system. SPP images were treated with shadow, sharpen, negative, greyscale sigma and greyscale exponential filters. Four observers subjectively evaluated films and unfiltered and filtered SPP images for the visibility of anatomical structures with various radiodensities as well as for overall image quality on a three-point rating scale. The statistical methods used were Kruskal-Wallis, odds ratio analysis and Cohen's kappa. Results: No statistically significant difference was found between film and unfiltered digital images except for low-contrast structures (P . 0.05). Film images were preferred for the visibility of low-contrast structures (P , 0.05). Best overall image quality was obtained with sharpened images (P , 0.05) followed by films and unfiltered digital images. Among all filtered images, sharpened ones received the highest ratings for the visibility of all anatomical structures (P , 0.05). The intra-and interobserver agreement ranged between moderate and substantial and between fair and moderate, respectively. Conclusions: Film and unfiltered SPP-based panoramic images performed equally well in terms of overall quality; however, films were best for the perception of low-contrast structures. The sharpening filter may be recommended for enhancing SPP panoramic images to improve the visual perception of most of the anatomical structures as well as overall quality.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Perception of anatomical structures in digitally filtered and conventional panoramic radiographs: a clinical evaluation

Baksı

Alpöz²,

Soğur³

et al. 2010

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

show abstract

“…Furthermore the easy preparing of the equipment and reproducibility already gives this technique an advantage. These two non-significant differences are possibly due to a small number of examiners even though the number is larger than other researches in the literature [24][25].…”

Section: Discussionmentioning

confidence: 60%

“…Those averages were compared and the highest value was considered the best barrier. This method is well known to radiologists as the subjective method and frequently used in scientific research to avoid personal preferences [24][25].…”

Section: -Excellent For Diagnostic Purposementioning

confidence: 99%

Exposure Standards for Digital and Analogue Dry Skull Orthopantomography

Beaini¹,

Dias²,

Melani³

2011

J Forensic Res

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“…High pass filter types that had been used are shadow [18] and sharpening [18] [22]. The pathologies that had been investigated were periodontal ligament space [21], lamina dura [2] and condition of alveolar bone [19].…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Image Enhancement Techniques for Dental X-ray Image Interpretation

Ahmad¹,

Taib²,

Khalid³

et al. 2012

IJMLC

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Abstract-This paper presents qualitative and quantitative comparison between original images and four image enhancement techniques namely adaptive histogram equalization (AHE), contrast adaptive histogram equalization (CLAHE), median adaptive histogram equalization (MAHE) and sharp contrast adaptive histogram equalization (SCLAHE) applied to dental x-ray images. Dental x-ray images usually taken with low radiation dosage are often presented as dark, low in contrast and noisy. These problems are usually solved with image enhancement techniques. However, choosing an appropriate technique is not an easy task especially for the purpose of disease diagnosis of periapical related lesion. This research involves the collection of ten intra-oral dental x-ray images which were collected from the Faculty of Dentistry UiTM Shah Alam, Malaysia. Each of the enhancement methods is applied to every collected image. A dentist was then asked to do the evaluation using questionnaire. She graded the quality of the images and the diagnostic ability of the periapical pathology observed in the images. Subsequently the quantitative analysis using contrast improvement index (CII), signal to noise ratio (SNR) and root mean square error (RMSE) were done to investigate the characteristic of the images base on the dentist evaluation. The finding shows that the enhancement techniques managed to enhance the pathology slightly better than the original image.Index Terms-Contrast enhancement, adaptive histogram equalization (AHE), dental X-ray.

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Subjective image quality of digitally filtered radiographs acquired by the Dürr Vistascan system compared with conventional radiographs

Cited by 47 publications

References 24 publications

Perception of anatomical structures in digitally filtered and conventional panoramic radiographs: a clinical evaluation

Perception of anatomical structures in digitally filtered and conventional panoramic radiographs: a clinical evaluation

Exposure Standards for Digital and Analogue Dry Skull Orthopantomography

An Analysis of Image Enhancement Techniques for Dental X-ray Image Interpretation

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