Reduction in size of digital images: does it lead to less detectability or loss of diagnostic information?

To analyse the effect of reduction in size of digital images on diagnostic outcome. A series of 100 Visualix III (Gendex Dental Systems, Milano, Italy; Dentsply, Des Plaines, IL, USA) images was made of size 10 and 15 endodontic files in upper and lower (pre)molars. Three forms of image were created...

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Veröffentlicht in:Dento-maxillo-facial radiology 1998-03, Vol.27 (2), p.93-96
Hauptverfasser: Versteeg, C H, Sanderink, G C, Lobach, S R, van der Stelt, P F
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container_end_page 96
container_issue 2
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container_title Dento-maxillo-facial radiology
container_volume 27
creator Versteeg, C H
Sanderink, G C
Lobach, S R
van der Stelt, P F
description To analyse the effect of reduction in size of digital images on diagnostic outcome. A series of 100 Visualix III (Gendex Dental Systems, Milano, Italy; Dentsply, Des Plaines, IL, USA) images was made of size 10 and 15 endodontic files in upper and lower (pre)molars. Three forms of image were created: (a) the original images, (b) reduced to one-half (containing one-quarter of the information of the original, and (c) zoomed-in, half-size images (magnification 2:1; original image size but with only one-quarter of the original information). Seven radiologists were asked to rate the position of the tip of the file, using a five-point confidence scale. ROC data were analysed by means of MANOVA statistics. A significant difference was found between the three image modalities for both size 10 (P < 0.005), and size 15 (P < 0.021) files. Reduction in size of digital images may cause less detectability as well as loss of diagnostic information.
doi_str_mv 10.1038/sj.dmfr.4600329
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source MEDLINE; Oxford University Press Journals All Titles (1996-Current)
subjects Computer Peripherals
Dental Instruments
Dental Pulp Cavity - diagnostic imaging
Dentistry
Humans
Microcomputers
Multivariate Analysis
Observer Variation
Quality Control
Radiographic Image Interpretation, Computer-Assisted
Radiography, Dental, Digital - instrumentation
Radiography, Dental, Digital - methods
Radiography, Dental, Digital - standards
ROC Curve
title Reduction in size of digital images: does it lead to less detectability or loss of diagnostic information?
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