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Evaluation of mechanical and projective standardization in digital subtraction radiography

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Abstract

µÎ°³ÀÇ °ÇÁ¶ ÀÎü µÎ°³°ñ ¾çÃø ÇÏ¾Ç ¼Ò±¸Ä¡ ¹× ±¸Ä¡ºÎ¸¦ ´ë»óÀ¸·Î, Rinn XCP ÆòÇàÀåÄ¡¸¦
ÀÌ¿ëÇÏ¿© ÆòÇà¹ýÀ¸·Î ±¸³» Ç¥ÁØ »çÁøÀ» °¢°¢ µÎ ¹ø¾¿ ¹Ýº¹ ÃÔ¿µÇϵÇ, ÇѹøÀº À§Ä¡ °íÁ¤ ¾ø
ÀÌ ÃÔ¿µÇÏ°í ÇѹøÀº XCP ±³ÇÕÆÇ¿¡ ºñ´Ò ½Ç¸®ÄÜ °í¹« ±³ÇÕ¸é ÀλóÀ縦 ÀÌ¿ëÇÏ¿© ±³ÇÕ¸éÀ»
ÀαâÇÑ »óÅ¿¡¼­ ÃÔ¿µÇÑÈÄ ºñÀ籸¼º°ú À籸¼º °øÁ¦ ¿µ»óÀ» Á¦ÀÛÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò
¾ú´Ù.
1. ºñÀ籸¼ºÀ¸·Î Áï ¼öµ¿ ÁßøÀ» ÀÌ¿ëÇÏ¿© Á¦ÀÛµÈ ¼Ò±¸Ä¡ ºÎÀ§ ¹× ´ë±¸Ä¡ ºÎÀ§ Àüü ¿µ»ó
¿¡ ´ëÇÑ °øÁ¦ ¿µ»óÀÇ SD´Â ±³ÇÕ¸é ºñÀαⱺ°ú Àαⱺ »çÀÌ¿¡¼­ ¸ðµÎ Åë°èÀûÀ¸·Î À¯ÀǼº ÀÖ
´Â Â÷À̸¦ ³ªÅ¸³»¾ú´Ù.
2. ºñÀ籸¼º, ºñÀαⱺÀÇ °æ¿ì, °ü½É ºÎÀ§¸¦ ÁßÁ¡ÀûÀ¸·Î ÁßøÇÔÀ¸·Î½á »óÀÇ °³¼±À» µµ¸ðÇÒ
¼ö ÀÖ¾úÀ¸¸ç ÀÌ°ÍÀº ÇغÎÇÐÀûÀ¸·Î ¹æ»ç¼± »óÀÇ ¿Ö°îÀÌ ¸¹ÀÌ µÇ´Â ºÎÀ§(¿©±â¼­´Â ´ë±¸Ä¡ ºÎ
À§º¸´Ù´Â ¼Ò±¸Ä¡ ºÎÀ§)¿¡¼­ ´õ ºÐ¸íÇÏ°Ô ³ªÅ¸³µ´Ù.
3. ºñÀ籸¼º, ÀαⱺÀÇ °æ¿ì, ÇغÎÇÐÀû ºÎÀ§³ª ÁßøÀÇ Á᫐ ºÎÀ§¿¡ »ó°ü¾øÀÌ ÀçÇö¼ºÀÌ ÀÖ
´Â »óÀÌ ¸¸µé¾îÁø´Ù. Áï ±³ÇÕ¸é Àα⸸À» ½ÃÇàÇÏ´õ¶óµµ ÃÔ¿µµÇ´Â ¿¬¼ÓÀûÀÎ ¹æ»ç¼± »çÁøÀº
µðÁöÅ» °øÁ¦ ¹æ»ç¼± »çÁø ÃÔ¿µ¼ú¿¡ ÀûÇÕÇÏ´Ù.
4. À籸¼º Áï ÀÚµ¿ ÁßøÀ» ÀÌ¿ëÇÏ¿© Á¦ÀÛµÈ ¼Ò±¸Ä¡ ºÎÀ§ ¹× ´ë±¸Ä¡ ºÎÀ§ Àüü ¿µ»ó¿¡ ´ë
ÇÑ °øÁ¦ ¿µ»óÀÇ SD°¡ ºñÀαⱺÀÇ °æ¿ì¿Í ÀαⱺÀÇ °æ¿ì¿¡ °¢°¢ Åë°èÀûÀ¸·Î À¯ÀǼº ÀÖ´Â Â÷
À̸¦ ³ªÅ¸³»Áö ¾Ê¾Ò´Ù. Áï À籸¼º °úÁ¤ÀÌ ±³ÇÕ¸é Àαâ¿Í °°Àº ±â°èÀû ±Ô°ÝÈ­ °úÁ¤À» ´ëÄ¡
ÇÒ ¼ö ÀÖ´Ù.
5. À籸¼º ºñÀαⱺÀÇ °æ¿ì, À籸¼º ¿µ»óÀ» ¸¸µé±â À§ÇØ ´ëÀÀÁ¡À» ÀâÀ» ¶§´Â ÇغÎÇÐÀû ºÎ
À§ÀÇ Æ¯¼ºÀ̳ª ´ëÀÀÁ¡À» Àâ´Â ºÎÀ§ÀÇ Å©±â¿¡ »ó°ü¾øÀÌ À¯»çÇÑ ¿µ»óÀÌ ¸¸µé¾îÁø´Ù.
6. À籸¼º, ÀαⱺÀÇ °æ¿ì. À籸¼ºÀ¸·Î »óÀÇ ±âÇÏÇÐÀû º¸Á¤À» ÇÑ´Ù°í ÇÏ´õ¶óµµ ¿ø·¡ÀÇ ¹æ
»ç¼±»çÁø »óÀÌ ÀαâµÈ Á¶°Ç¿¡¼­ ÃÔ¿µµÈ Ç¥ÁØÈ­µÈ »çÁøÀÎ °æ¿ì¿¡´Â ´ëÀÀÁ¡À» Àâ´Â ¹üÀ§°¡ Á¼
À» ¼ö·Ï ´õ ÁÁÀº »óÀ» ¾òÀ» ¼ö ÀÖ´Ù.
#ÃÊ·Ï#
The following conclusions were obtained from the non-reconstructed and reconstructed
subtraction images of the standard intraoral radiographs which were taken with
paralleling technique with Rinn XCP only and with occlusal bite registration for
geometric standardization using bilateral mandibular premolar and molar regions of two
dry human skulls.
1. The SD of the overall subtraction images of the premolars and molars of the
non-reconstructed, that is, the manual superimposition showed statistically significant
difference between the non-registered and registered groups.
2. In non-reconstructed and non-registered cases, the quality of the subtraction
images were improved when superimposition was focally done and this was more
evident in areas where the radiographic images tend to be distorted due to anatomic
reasons.
3. In non-reconstructed and registered cases, the subtraction images were consistent
regardless of the anatomic site or the focus of superimposition. This means that the
geometric standardization with only occlusal bite registration could produce serial
radiographs which is suitable for subtraction.
4. The SD of the overall subtraction images of the premolars and molars of the
reconstructed, that is, the automatic superimposition showed statistically insignificant
difference between the non-registered and registered groups. This means that using
reconstruction, subtraction radiography is possible without occlusal bite registration.
5. In reconstructed and non-registered cases, compatible quality of the subtraction
images were obtained regardless of the anatomic site or area of the corresponding
points.
6. In reconstructed and registered cases, best subtraction images whose quality
showed sensitivity to the areas of corresponding points were obtained.

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