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Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.24, no.4, 2006³â, pp.387-391
ÀÚ±ÃÁÖÀ§ ¹æ»ç¼± ±ÙÁ¢Ä¡·á½Ã MIRD ÆÒÅÒÀ» ÀÌ¿ëÇÑ ÁÖº¯Àå±âÀÇ ÇÇÆøÈ¯°æÆò°¡
( Assessment of Dose Distribution using the MIRD Phantom at Uterine Cervix and Surrounding Organs in High Doserate Brachytheraphy )
ÀÌÀ±Á¾;³ë¿µÃ¢;ÀÌÀç±â; Çѱ¹¿øÀڷ¿¬±¸¼Ò Á¤À¾ºÐ¼Ò ¹æ»ç¼±¿¬±¸¿ø;Çѱ¹¿øÀڷ¿¬±¸¼Ò Á¤À¾ºÐ¼Ò ¹æ»ç¼±¿¬±¸¿ø;ÇѾç´ëÇб³ ½Ã½ºÅÛ°øÇкÎ;
 
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Manchester system ŸÀÔÀÇ ÀåÂø±âÁß »ó, ÇϺο¡ Â÷Æóü°¡ ÀåÂøµÇ¾î ÀÖ´Â Henschke ÀåÂø±â¸¦ ÀÌ¿ëÇÏ¿© ÀÚ±Ã¾Ï ±ÙÁ¢Ä¡·á½Ã Àڱà ¹× ÁÖº¯Àå±âÀÇ ¼±·®ºÐÆ÷¸¦ Æò°¡Çϱâ À§ÇÏ¿© Ä¡·á°èȹ¼ö¸³¿¡ »ç¿ëµÇ´Â ½Ç¿ëÇÁ·Î±×·¥ °á°ú¿Í ¸óÅ×Ä®·Î ¸ðÀǰè»ê °á°ú¸¦ ºñ±³ÇÏ¿´´Ù. ¶ÇÇÑ Àڱà ¹× ÁÖº¯ Á¤»óÁ¶Á÷ÀÌ ¹ÞÀº ¼±·®À» °è»êÇϱâ À§ÇØ ORNL(Oak Ridge National Laboratory)¿¡¼­ ¼ö¸³ÇÑ ¿©¼ºÀÇ MIRD (Medical Internal Radiation Dose)Çü ¸ðÀÇÇÇÆøÃ¼¸¦ ÀÌ¿ë ÇÏ¿© ÁÖº¯Àå±â°¡ ¹Þ´Â ¼±·®À» MCNP·Î °è»êÇÏ¿´´Ù. ¸óÅ×Ä®·Î ¸ð»ç¿¡´Â MCNP 4BÄڵ带 »ç¿ëÇÏ¿´À¸¸ç, ½Ç¿ë°è»êÇÁ·Î±×·¥¿¡´Â GAMMADOT¸¦ ÀÌ¿ëÇÏ¿´´Ù MCNP°è»ê¿¡´Â $^{192}Ir$ ¼±¿ø°ú ÀåÂø±âÀÇ ±âÇÏÇÐÀû ¸ð¾çÀ» Á¤¹ÐÇÏ°Ô ¸ð»çÇÏ¿© °è»ê ¿ÀÂ÷¸¦ ÁÙÀ̵µ·Ï ÇÏ¿´À¸¸ç, Ä¡·á°èȹ¿ë ½Ç¿ë°è»êÇÁ·Î±×·¥ÀÇ °è»ê Á¶°Ç°ú µ¿ÀÏÇÏ°Ô Ä¡·á¼±¿øÀÇ °­³» ü·ù½Ã°£°ú ü·ùÀ§Ä¡¸¦ Àû¿ëÇÏ¿© ¼±·®À» °è»êÇÏ¿´´Ù. ÁÖ¿ä ¼±·® ºñ±³ Æò°¡Á¡Àº Manchester system¿¡¼­ »ç¿ëµÇ´Â 4°÷°ú ICRU 38¿¡¼­ Manchester systemÀ» º¸¿ÏÇϱâ À§ÇØ Á¦½ÃÇÑ ¹æ±¤Ç¥¸é ¹× Á÷ÀåÀÌ¿´´Ù. ½Ç¿ë°è»ê °á°ú´Â MCNP¸ðÀǰè»êÀÇ °á°ú¿Í ºñ±³ÇßÀ» ¶§ ´ëºÎºÐ À§Ä¡¿¡¼­ »ó´ë¿ÀÂ÷ 4% À̳»ÀÇ °á°ú¸¦ º¸¿´°í, ³­ÇüüÀÇ Â÷Æóü ÀåÂøÈ¿°ú·Î ÀÎÇÑ ¹æ±¤°ú Á÷Àå¿¡¼­ÀÇ ¼±·®°¨¼èÈ¿°ú´Â °¢°¢ 19%, 20%¿´´Ù.
Computational and experimental dosimetry of Henschke applicator with respect to high dose rate brachytherapy using the MIRD phantom and a remote control afterloader were performed. A comparison of computational dosimetry was made between the simulated Monte Carlo dosimetry and GAMMADOT brachytherapy Planning system's dosimetry. Dose measurements was performed using ion chamber in a water phantom. Dose rates are calculated using Monte Carlo code MCNP4B and the GAMMADOT. Thecomputational models include the detailed geometry of Ir-192 source, tandem tube, and shielded ovoids for accurate estimation. And transit dose delivered during source extension to and retraction from a given dwell position was estimated by Monte Carlo simulations. Point doses at ICRU bladder/rectal pointswhich have been recommened by ICRU 38 was assessed. Calculated and measured dose distribution data agreed within 4% each other. The shielding effect of ovoids leads to 19% and 20% dose reduction at bladder surface and rectal points.
 
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Brachy therapy;MCNP;HDR;MIRD Phantom;
 
ȯ°æ»ý¹° / v.24, no.4, 2006³â, pp.387-391
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200634516374628)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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