AI Article Synopsis
- Digital cephalometric radiography is increasingly common, leading to a need for better image storage and faster transmission, with compression being a solution despite potential quality loss.
- This study tested the JPEG2000 compression standard on ten digital images, assessing landmark identification by six raters across various compression ratios.
- Findings showed that most compression levels maintained landmark identification accuracy, although some specific points were less reliable at extreme compression ratios, indicating that JPEG2000 is a dependable choice for orthodontic imaging.
Article Abstract
Introduction: As digital imaging improves and digital cephalometric radiography becomes more prevalent, the need for digital storage space and transmission speed will increase. Compression of the image files is 1 method to overcome transmission overload. However, compression could compromise image quality. The purpose of this study was to determine the range of compression ratios, by using the JPEG2000 standard, within which the identification of landmarks on cephalometric radiographs is not compromised.
Methods: Ten lateral cephalometric digital images were used. Six raters identified 19 landmarks under controlled viewing conditions. The images included the original uncompressed TIFF image and the JPEG2000 format at 3:1, 12:1, 50:1, and 110:1 compression ratios. The images were randomized and displayed with image processing software. The x and y coordinates of each landmark were recorded.
Results: All compression ratios performed equally well compared with the original images with the exception of A-point and nasion at 110:1 and gonion at 3:1 compression ratios. All landmark identifications were precise with the exception of the maxillary incisal apex and edge at the 12:1 and 50:1 compression ratios, respectively.
Conclusions: JPEG2000 is a reliable file format that can be implemented in orthodontic practice.
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| http://dx.doi.org/10.1016/j.ajodo.2009.02.029 | DOI Listing |
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