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An Experimental Study On The Readability Of The Digital Images In The Furcal Bone Defects

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Abstract

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¼ºÇÏ¿´À¸¸ç, °¢ º´ ¼ÒÀÇ Çü¼º´Ü°è¸¶´Ù °¨±¤µµ ¥°±º(Ektaspeed EP-21, Kodak Co., U. S. A.)
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·Â½ÃÅ°°í 512¡¿480ÀÇ ÇØ»óµµ¿Í 256´Ü°èÀÇ °èÁ¶µµ¸¦ Áö¿øÇÏ´Â ¿µ»óó¸®ÀåÄ¡ÀÎ Sylvia Image
Capture Board(Jovial Logic Co., U.S.A.)·Î °¢°¢ÀÇ Ä¡±Ù´Ü¹æ»ç¼±»çÁø»óÀ» ¸ð´ÏÅÍ»ó¿¡ µðÁö
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µÇ´Â °æÇâÀ» º¸¿´´Ù.
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»ó¿¡¼­ÀÇ Æǵ¶´ÉÀÌ ³ôÀº °æÇâÀ» º¸¿´´Ù.
5. Æǵ¶Àǻ簡 ºÎ¿© ÇÑ Á¡¼öÀÇ º¯µ¿°è¼ö´Â Ä¡±Ù´Ü ¹æ»ç¼±»çÁø°ú µðÁöÅÐ ¿µ»ó¿¡¼­ À¯ÀÇÇÑ
Â÷ÀÌ°¡ ¾ø¾ú´Ù.
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ÇÑ ¿µ»ó󸮹æ¹ýÀ» µµÀÔÇÏ¿© È°¿ëÇÏ´Â °ÍÀÌ ÇÊ¿äÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù
#ÃÊ·Ï#
The aim of this study was to evaluate and compare observer performance between
conventional radiographs and their digitized images for the detection of bone loss in the
bifurcation of mandibular first molar. One dried human mandible with minimal
periodontal bone loss around the first molar was selected and serially enlarged 17 step
dejects were prepared in the bifurcation area.
The mandible was radiographed with exposure time of 0.12, 0.20, 0.25, 0.32, 0.40, 0.64
seconds, after each successive step in the preperation and all radiographs were digitized
with IBM-Pc/32 bit-Dx compatible, video camera (VM-S8200, Hibachi Co., Japan), and
color monitor(Multisync 3D, NEC, Japan). Sulvia Image Capture Board for the
ADG(analog to digital converter) was used The obtained results were as follows:
1. lift the Conventional radiographs, the mean score of the readability was higher at
the condition of exposure time with 0.32 second. Also, as the size of artificial lesion was
increased, the readability of radiographs was elevated(p<0.05).
2. lift the digital images, the mean score of the readability was higher at the condition
of exposure time with 0.40% second. Also, as the size of artificial lesion was increased,
the readability of digital images was elevated(p<0.05).
3. At the same exposure time, the mean scores of readability were mostly higher in
the digitized images. As the exposure tinge was increased, the digital images were
superior to radiographs in readability.
4. As the size ol lesion was changed, the digital images were superior to radiographs
in detecting small lesion.
5. The coefficient of variation of mean score has no significant difference between
digital images and radiographs.

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