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°ñ¹ÝºÎ ¾Ï ȯÀÚ¸¦ À§ÇÑ °íÁ¤±â±¸ °³¹ß ¹× ¹æ»ç¼±Ä¡·á ½Ã È¿¿ë¼º Æò°¡ Development of Immobilization Devices for Patients with Pelvic Malignancies and a Feasibility Evaluation during Radiotherapy

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¹Ú¾ç±Õ ( Park Yang-Kyun ) 
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ÇϼºÈ¯ ( Ha Sung-Whan ) 
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¹ÚÂùÀÏ ( Park Chan-Il ) 
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Abstract

¸ñ Àû: °ñ¹ÝºÎ ¾Ï ȯÀÚ Ä¡·á ½Ã ÀçÇö¼ºÀ» Çâ»ó½ÃÅ°°í ȯÀÚ¿¡°Ô Æí¾ÈÇÔÀ» ÁÖ´Â ÇÏü °íÁ¤±â±¸¸¦ °³¹ßÇÏ¿´°í ±× È¿¿ë¼ºÀ» °ËÁõÇÏ¿´´Ù.

´ë»ó ¹× ¹æ¹ý: ÇÏü °íÁ¤±â±¸´Â ¾Ó¿ÍÀ§¿Í º¹¿ÍÀ§¿¡¼­ ȯÀÚÀÇ ¹«¸­, Çã¹÷Áö, ¹ßÀ» °íÁ¤ÇÒ ¼ö ÀÖµµ·Ï ¼³°èµÇ¾ú°í, Æú¸®¿ì·¹Åº ÀçÁú·Î Á¦À۵Ǿú´Ù. °í¾ÈµÈ °íÁ¤±â±¸´Â ¾Ó¿ÍÀ§¿¡¼­ ¹«¸­ÀÇ À§Ä¡¸¦ °íÁ¤ÇÏ´Â º¸Á¶±â±¸ ¹× ¹ßÀÇ À§Ä¡¸¦ °íÁ¤ÇÏ´Â º¸Á¶±â±¸¸¦ °³¹ßÇÏ¿´°í º¹¿ÍÀ§¿¡¼­ ¹«¸­ÀÇ À§Ä¡¸¦ °íÁ¤ÇÏ´Â º¸Á¶±â±¸¸¦ °³¹ßÇÏ¿´´Ù. ¾Ó¿ÍÀ§¿ë ¹«¸­ °íÁ¤¿ë º¸Á¶±â±¸´Â µ¿½Ã¿¡ º¹¿ÍÀ§¿¡¼­ ¹ßÀ» °íÁ¤ÇÒ ¼ö ÀÖµµ·Ï ¼³°èÇÏ¿´´Ù. ±â±¸ÀÇ È¿¿ë¼ºÀ» °ËÁõÇϱâ À§ÇÏ¿© º»¿ø¿¡¼­ Ä¡·á¸¦ ¹ÞÀº 61¸íÀÇ Àü¸³¼±¾Ï ȯÀÚ¸¦ ´ë»óÀ¸·Î ÀçÇö¼ºÀ» ÃøÁ¤ÇÏ¿´´Ù. ÁÂ¿ì ¹æÇâ, ÀüÈÄ ¹æÇâ, µÎ¹Ì(cranial-caudal) ¹æÇâ¿¡ ´ëÇÏ¿©, ½Äº° °¡´ÉÇÑ bony-landmark¸¦ ÀçÇö¼ºÀÇ ±âÁØÀ¸·Î ¼³Á¤ÇÏ¿´´Ù. ´ë»ó ȯÀÚ¿¡ ´ëÇÏ¿© 1) µðÁöÅÐÀ籸¼º»çÁø(DRR)°ú ¸ðÀÇÄ¡·á»çÁø(simulation image)ÀÇ Â÷ÀÌ, 2) µðÁöÅÐÀ籸¼º»çÁø°ú Á¶»ç¿µ¿ª»çÁø(linacgram)ÀÇ Â÷ÀÌ, 3) Á¶»ç¿µ¿ª»çÁø °£ÀÇ Ç¥ÁØÆíÂ÷¸¦ Á¶»çÇÏ¿´°í, °íÁ¤±â±¸¸¦ »ç¿ëÇÑ È¯ÀÚ±º°ú »ç¿ëÇÏÁö ¾ÊÀº ȯÀÚ±º¿¡ ´ëÇÏ¿© ÀçÇö¼ºÀÇ Â÷À̸¦ Åë°èÀûÀ¸·Î ºÐ¼®ÇÏ¿´´Ù.

°á °ú: ÇÏü °íÁ¤±â±¸¸¦ »ç¿ëÇÏÁö ¾ÊÀº ȯÀÚ±º¿¡¼­ °¢ ¹æÇâ(Á¿ì, ÀüÈÄ, µÎ¹Ì ¹æÇâ)¿¡ µû¸¥ µðÁöÅÐÀ籸¼º»çÁø°ú ¸ðÀÇÄ¡·á »çÁøÀÇ Â÷ÀÌ´Â Á¿ì, ÀüÈÄ, µÎ¹Ì ¹æÇâ¿¡ µû¶ó °¢°¢ 1.5¡¾0.9 mm, 3.0¡¾3.6 mm, 1.6¡¾0.9 mm, µðÁöÅÐÀ籸¼º»çÁø°ú Á¶»ç¿µ¿ª»çÁøÀÇ Â÷ÀÌ´Â °¢°¢ 1.6¡¾1.2 mm, 4.0¡¾4.1 mm, 4.2¡¾5.5 mm, Á¶»ç¿µ¿ª»çÁø °£ÀÇ Æò±Õ Ç¥ÁØÆíÂ÷´Â °¢°¢ 1.1 mm, 2.1 mm, 1.0 mm·Î ³ªÅ¸³µ´Ù. ÇÏü °íÁ¤±â±¸¸¦ »ç¿ëÇÑ È¯ÀÚ±º¿¡¼­ µðÁöÅÐÀ籸¼º»çÁø°ú ¸ðÀÇÄ¡·á»çÁøÀÇ Â÷ÀÌ´Â Á¿ì, ÀüÈÄ, µÎ¹Ì ¹æÇâ¿¡ µû¶ó °¢°¢ 1.3¡¾1.9 mm, 1.8¡¾1.5 mm, 1.1¡¾1.1 mm, µðÁöÅÐÀ籸¼º»çÁø°ú Á¶»ç¿µ¿ª»çÁø °£ÀÇ Â÷ÀÌ´Â °¢°¢ 1.0¡¾1.8 mm, 1.2¡¾0.9 mm, 1.2¡¾0.8 mm, Á¶»ç¿µ¿ª»çÁø °£ÀÇ Æò±Õ Ç¥ÁØÆíÂ÷´Â °¢°¢ 0.9 mm, 1.6 mm, 0.8 mm·Î °íÁ¤±â±¸¸¦ »ç¿ëÇÏÁö ¾Ê¾ÒÀ» ¶§º¸´Ù À¯ÀÇÇÏ°Ô ÀçÇö¼ºÀÌ Çâ»óµÈ °ÍÀ¸·Î ³ªÅ¸³µ´Ù.

°á ·Ð: º» ¿¬±¸¿¡¼­ °í¾ÈµÈ ÇÏü °íÁ¤±â±¸´Â °ñ¹ÝºÎ¾Ï ȯÀÚ Ä¡·á ½Ã Æí¾ÈÇÔÀ» Á¦°øÇØ ÁÖ°í ÀçÇö¼º Çâ»ó¿¡ µµ¿òÀ» ÁÖ´Â °ÍÀ¸·Î »ç·áµÈ´Ù.

Purpose: Immobilization devices that improve the setup reproducibility of pelvic cancer patients and that provide comfort to patients during radiotherapy were designed and the feasibility of the devices was evaluated.

Materials and Methods: A customized device was designed to immobilize a knee, thigh, and foot of a patient. Sixty-one patients with prostate cancer were selected and were divided into two groups-with or without devices. The setup errors were measured with respect to bony landmarks. The difference between digitally reconstructed radiographs (DRR) and simulation films, and the differences between DRR and portal films were measured.

Results: The left-right (LR), anterior-posterior (AP) and craniocaudal (CC) errors between the DRR and simulation films were 1.5¡¾0.9 mm, 3.0¡¾3.6 mm, and 1.6¡¾0.9 mm, respectively without devices. The errors were reduced to 1.3¡¾1.9 mm, 1.8¡¾1.5 mm and 1.1¡¾1.1 mm, respectively with the devices. The errors between DRR and portal films were 1.6¡¾1.2 mm, 4.0¡¾4.1 mm, and 4.2¡¾5.5 mm, respectively without the devices and were reduced to 1.0¡¾1.8 mm, 1.2¡¾0.9 mm, and 1.2¡¾0.8 mm, respectively, with the devices. The standard deviations among the portal films were 1.1 mm, 2.1 mm, and 1.0 mm at each axis without the devices and 0.9 mm, 1.6 mm and 0.8 mm with the devices. The percentage of setup errors larger than 3 mm and 5 mm were significantly reduced by use of the immobilization devices.

Conclusion: The designed devices improved the setup reproducibility for all three directions and significantly reduced critical setup errors.

Å°¿öµå

¹æ»ç¼± Ä¡·á; Àü¸³¼±¾Ï; ÇÏü °íÁ¤±â±¸; ÀçÇö¼º
Radiation therapy; Prostate cancer; Immoblization devices; Positioning reproducibility

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KoreaMed
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