대한구강악안면방사선학회

Korean Academy of Oral and Maxillofacial Radiology

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Geometric correction of radiographic images using general purpose image processing program
저자 : 정지성, 김은경, 이상훈
1994년|24권 2호|Page : 371-375|조회수 861
Full Text : 1994_371.pdf (556.9K)
TI : Geometric correction of radiographic images using general purpose image processing program

 AU : Cheong JS; Kim EK; Lee SH
 AD : Department of Oral and Maxillofacial Radiology, Dental School Department. of Medical Engineering, Medical School, Dankook University
 SO : JKAOMFR, 1994;24(2):371-375
 ISSN : 1225-049X
 PY : 1994
 LA : English
 CP : KOREA

 AB : The present study was undertaken to compare geometric corrected image by general-purpose image processing program for the Apple Macintosh II computer(NIH Image, Adobe Photoshop) with standardized image by individualized custom fabricated alignment instrument. Two non-standardized periapical films with XCP film holder only were taken at the lower molar portion of 19 volunteers. Two standardized periapical films with customized XCP film holder with impression material on the bite-block were taken for each person. Geometric correction was performed with Adobe Photoshop and NIH Image program. Specially, arbitrary image rotation function of "Adobe Photoshop" and subtraction with transparency function of "NIH Image" were utilized. The standard deviations of grey values of subtracted images were used to measure image similarity. Average standard deviation of grey values of subtracted images if standardized group was slightly lower than that of corrected group. However, the difference was found to be statistically insignificant(p>0.05). It is considered that we can use "NIH Image" and "Adobe Photoshop" program for correction of nonstandardized film, taken with XCP film holder at lower molar portion.

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