TY - JOUR
T1 - Effect of JPEG2000 compression on landmark identification of lateral cephalometric digital radiographs
AU - Abdelkarim, Ahmad
AU - Nummikoski, Pirkka
AU - Gakunga, Peter
AU - Hatch, John P.
AU - Dove, S. Brent
PY - 2010/10
Y1 - 2010/10
N2 - 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.
AB - 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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U2 - 10.1016/j.ajodo.2009.02.029
DO - 10.1016/j.ajodo.2009.02.029
M3 - Article
C2 - 20889059
AN - SCOPUS:77957706757
SN - 0889-5406
VL - 138
SP - 518
EP - 524
JO - American Journal of Orthodontics and Dentofacial Orthopedics
JF - American Journal of Orthodontics and Dentofacial Orthopedics
IS - 4
ER -