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

OBJECTIVES To compare the different digital filters implemented in the Dürr Vistascan system with conventional film and to analyze the filter specificity to anatomic structures. STUDY DESIGN Ten panoramic image pairs and 10 periapical image pairs (1 digital and 1 conventional) were obtained from 20 patients conventionally and digitally. The display quality of different anatomic image structures was rated subjectively on a 5-point scale. The responses were evaluated using ANOVA and Tukey-Kramer post hoc tests. The intraobserver reliability was evaluated by Cohen's kappa statistics. RESULTS The display quality of anatomic structures was rated higher by using Caries 1 or 2 filters for periapical and Periodontal 1 or 2 filters for panoramic images, whereas nonfiltered and Noise Reduction-filtered images received the lowest scorings compared to all other digital image modalities (P < or = .0097). The superiority of conventional radiographs to the digital ones was statistically significant (P < or = .0039 and P < or = .0152 respectively). CONCLUSIONS Depending on the diagnostic task, digital images of the Vistascan system should be filtered before examination. Perfect conventional radiographs still remain the gold standard for image quality.

[1]  M Analoui.  Radiographic digital image enhancement. Part II: transform domain techniques. , 2001, Dento maxillo facial radiology.

[2]  Robert M Love,et al.  A comparison of phosphor-plate digital images with conventional radiographs for the perceived clarity of fine endodontic files and periapical lesions. , 2002, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[3]  K. H. Hohne,et al.  Pictorial Information Systems in Medicine , 1986, NATO ASI Series.

[4]  S. Pizer.  Psychovisual issues in the display of medical images , 1986 .

[5]  M K Shrout,et al.  Digital enhancement of radiographs: can it improve caries diagnosis? , 1996, Journal of the American Dental Association.

[6]  D. Tyndall,et al.  A comparison of Kodak Ektaspeed Plus film and the Siemens Sidexis digital imaging system for caries detection using receiver operating characteristic analysis. , 1998, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[7]  M Analoui.  Radiographic image enhancement. Part I: spatial domain techniques. , 2001, Dento maxillo facial radiology.

[8]  C E Ravin,et al.  Digital chest radiography with photostimulable storage phosphors: signal-to-noise ratio as a function of kilovoltage with matched exposure risk. , 1993, Radiology.

[9]  A Mol.  Digital quantitative radiography: tools and toys. , 1999, Dento maxillo facial radiology.

[10]  T M Lehmann,et al.  Image processing and enhancement provided by commercial dental software programs. , 2002, Dento maxillo facial radiology.

[11]  Gang Li.  Comparative investigation of subjective image quality of digital intraoral radiographs processed with 3 image-processing algorithms. , 2004, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[12]  A Mol,et al.  Image processing tools for dental applications. , 2000, Dental clinics of North America.

[13]  A Wenzel,et al.  Computer-aided image manipulation of intraoral radiographs to enhance diagnosis in dental practice: a review. , 1993, International dental journal.

[14]  C. K. Yuen,et al.  Theory and Application of Digital Signal Processing , 1978, IEEE Transactions on Systems, Man, and Cybernetics.

[15]  H G Gröndahl,et al.  Subjective image quality of solid-state and photostimulable phosphor systems for digital intra-oral radiography. , 2000, Dento maxillo facial radiology.

[16]  A Wenzel,et al.  Digital radiography and caries diagnosis. , 1998, Dento maxillo facial radiology.

[17]  R A Cederberg,et al.  Influence of the digital image display monitor on observer performance. , 1999, Dento maxillo facial radiology.

[18]  Anil K. Jain.  Fundamentals of Digital Image Processing , 2018, Control of Color Imaging Systems.

[19]  A. Farman,et al.  A comparison of 18 different x-ray detectors currently used in dentistry. , 2005, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[20]  G. Seward,et al.  Oral Radiology: Principles and Interpretation , 1982 .

[21]  M. Vannier,et al.  Bitewing-based alveolar bone densitometry: digital imaging resolution requirements. , 1994, Dento maxillo facial radiology.

[22]  S. Hassfeld,et al.  Digital Radiography of Interproximal Caries: Effect of Different Filters , 1999, Caries Research.

[23]  A G Farman,et al.  Effect of beam energy and filtration on the signal-to-noise ratio of the Dexis intraoral X-ray detector. , 2004, Dento maxillo facial radiology.

[24]  H G Gröndahl,et al.  Detection of approximal caries with a storage phosphor system. A comparison of enhanced digital images with dental X-ray film. , 1996, Dento maxillo facial radiology.

[25]  Y Hayakawa,et al.  Intraoral radiographic storage phosphor image mean pixel values and signal-to-noise ratio: effects of calibration. , 1998, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[26]  H. Gröndahl,et al.  Quality of film-based and digital panoramic radiography. , 2004, Dento maxillo facial radiology.

[27]  K Kuroyanagi,et al.  Comparison of three intra-oral storage phosphor systems using subjective image quality. , 2000, Dento maxillo facial radiology.

[28]  M. Analoui,et al.  Digital radiographic image archival, retrieval, and management. , 2000, Dental clinics of North America.