TY - JOUR
T1 - Preliminary evaluation of a digital system for rotational panoramic radiography
AU - Dove, S. Brent
AU - McDavid, William D.
AU - Welander, Ulf
AU - Tronje, Gunilla
N1 - Funding Information:
This project was supported by grants from the University of Texas Higher Education Coordinating Board Advanced Technology Program (2224 and 003659-015) to the University of Texas Health Science Center and by a grant from the Naltional Institute of Dental Research (IR43DE08930) to Biomedical Development Corporation. aAssistant Professor, Department of Dental Diagnostic Science, University of Texas Health Science Center. bProfessor, Department of Dental Diagnostic Science, University of Texas Health Science Center. “Professor and Chairman, Department linska Institutet. dDocent, Department 7116134799
PY - 1992/5
Y1 - 1992/5
N2 - A prototype system for direct digital panoramic radiography has been evaluated with respect to density, contrast, magnification, distortion, resolution, and overall image quality. Density and contrast depend on detector calibration and may be modified by the display system or by digital processing of the captured image. Variation of magnification in the horizontal and vertical dimensions gives rise to distortion phenomena that are identical to those encountered in film-based systems. Resolution in the vertical dimension is determined by the pitch of the detector elements. In the horizontal dimension, resolution is limited by the effective width of the detector elements. To evaluate the clinical acceptability of the images, radiologists and general practice residents were asked to assess the perceptibility of important radiographic landmarks in film-based and digital images of both a radiographic phantom and a patient. The digital system performed on a par with film in the representation of normal morphologic structures of the clinical human subject whereas more differences were apparent in the phantom images. The general practice residents consistently rated the digital images higher than their radiologist counterparts did. No consistent trends were found to indicate any inherent deficiencies of the digital system in the depiction of any one area. The results indicate the promise of direct digital acquisition as a method of panoramic imaging.
AB - A prototype system for direct digital panoramic radiography has been evaluated with respect to density, contrast, magnification, distortion, resolution, and overall image quality. Density and contrast depend on detector calibration and may be modified by the display system or by digital processing of the captured image. Variation of magnification in the horizontal and vertical dimensions gives rise to distortion phenomena that are identical to those encountered in film-based systems. Resolution in the vertical dimension is determined by the pitch of the detector elements. In the horizontal dimension, resolution is limited by the effective width of the detector elements. To evaluate the clinical acceptability of the images, radiologists and general practice residents were asked to assess the perceptibility of important radiographic landmarks in film-based and digital images of both a radiographic phantom and a patient. The digital system performed on a par with film in the representation of normal morphologic structures of the clinical human subject whereas more differences were apparent in the phantom images. The general practice residents consistently rated the digital images higher than their radiologist counterparts did. No consistent trends were found to indicate any inherent deficiencies of the digital system in the depiction of any one area. The results indicate the promise of direct digital acquisition as a method of panoramic imaging.
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U2 - 10.1016/0030-4220(92)90111-3
DO - 10.1016/0030-4220(92)90111-3
M3 - Article
C2 - 1518653
AN - SCOPUS:0026749978
VL - 73
SP - 623
EP - 632
JO - Oral Surgery Oral Medicine and Oral Pathology
JF - Oral Surgery Oral Medicine and Oral Pathology
SN - 2212-4403
IS - 5
ER -