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´Ù¿ëµµ ÆÒÅè¿¡¼­ Á¤À§¹æ»ç¼±¼ö¼ú±â¹ýÀÇ ¼±·® Á¤È®µµ È®ÀÎ Confirmation of the Dose Distribution by Stereotactic Radiosurgery Technique with a Multi-purpose Phantom

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À¯ÇüÁØ/Hyung Jun Yoo ±èÀÏÇÑ/ÇϼºÈ¯/¹ÚÂùÀÏ/Çã¼ø³ç/°­À§»ý/Il Han Kim/Sung Whan Ha/Charn Il Park/Sun Nyung Hur/Wee Saing Kang

Abstract

¸ñÀû: º» ±³½Ç¿¡¼­ °³¹ßÇÑ Á¤À§¹æ»ç¼±¼ö¼ú ½Ã½ºÅÛÀÇ Á¤µµ°ü¸®¸¦ À§ÇÏ¿© ´Ù¿ëµµ ÆÒÅèÀ» Á¦ÀÛÇÏ°í Á¤À§¹æ»ç¼±¼ö¼ú ±â¹ýÀÇ ¼±·®ÀÇ Á¤È®µµ¸¦ È®ÀÎÇÏ·Á ÇÏ¿´´Ù.

´ë»ó ¹× ¹æ¹ý: CL2100C ¼±Çü°¡¼Ó±â¿¡¼­ ¹ß»ýÇÏ´Â 6 §È ¿¢½º¼±À» »ç¿ëÇÏ¿© Á¤À§Àû ¹æ»ç¼±¼ö¼úÀ» ½ÃÇàÇÏ¿´°í FarmerÇü ÀÌ¿ÂÇÔ, 0.125 §¦ ÀÌ¿ÂÇÔ, ´ÙÀÌ¿Àµå °ËÃâ±â µîÀ» Á¤À§ ±âÁرⱸ°¡ ºÎÂøµÈ ÆÒÅè³»¿¡ ¼³Ä¡ÇÑ ÈÄ ¼±·®À» ÃøÁ¤ÇÏ¿´´Ù. °íÁ¤ ºö, 20¢ª¡­100¢ªÀÇ
°¢µµ¸¦
°®´Â ´ÜÀÏȸÀüºö, º¹ÇÕȸÀüºö µîÀÇ ¹æ»ç¼±Á¶»ç Á¶°Ç¿¡¼­ ÃøÁ¤±â¿Í ÆÒÅèÀÇ »ó´ëÀû À§Ä¡¸¦ º¯È­½ÃÅ°¸é¼­ ÃøÁ¤ÇÏ¿´´Ù. ³»°æÀÌ 10, 20, 30, 40 §®ÀÎ ¿øÇüÀÇ 3Â÷ Äݸ®¸ÞÀÌÅ͸¦ »ç¿ëÇÏ¿´´Ù.

°á°ú: °íÁ¤ ºö, ´ÜÀÏ È¸Àüºö, 5°³ÀÇ È¸Àü ºöÀ¸·Î ±¸¼ºµÈ º¹ÇÕȸÀüºö µî¿¡¼­ÀÇ ¼±·®¿ÀÂ÷´Â FarmerÇü ÀÌ¿ÂÇÔÀ¸·Î ÃøÁ¤ÇÑ °æ¿ì´Â 0.5% ÀÌÇÏ, 0.125 §¦ ÀÌ¿ÂÇÔÀÇ °æ¿ì¿¡´Â 0.5%, ´ÙÀÌ¿Àµå °ËÃâ±âÀÎ °æ¿ì¿¡´Â 2% À̳»¿´´Ù.

°á·Ð: º» ±³½Ç °³¹ß Á¤À§¹æ»ç¼±¼ö¼ú ±â¹ý¿¡ ÀÇÇÑ ¹æ»ç¼± Á¶»ç¼±·®ÀÇ Á¤È®µµ¸¦ È®ÀÎÇÏ¿´À¸¸ç ÀÌ ÀÚ·á´Â ÇâÈÄ Á¤À§¹æ»ç¼±¼ö¼ú ¹× ´ÙºÐÇÒ ¹æ»ç¼±Ä¡·áÀÇ Á¤µµ°ü¸®¿¡ À¯¿ëÇÑ ±âÃÊÀÚ·á·Î È°¿ëµÉ °ÍÀÌ´Ù.

Purpose: For the purpose of quality assurance of self-developed stereotactic radiosurgery system, a multi-purpose phantom was fabricated, and accuracy of radiation dose distribution during radiosurgery was measured using this phantom.

Materials and Methods: A farmer chamber, a 0.125 §¦ ion chamber and a diode detector were used for the dosimetry. Six §È x-ray from a linear accelerator (CL2100C, Varian) with stereotactic radiosurgery technique (Green Knife) was used, and
multi-purpose phantom was attached to a stereotactic frame (Fisher type). Dosimetry was done by combinations of locations of the detectors in the phantom, fixed or arc beams, gantry angles (20 ¡­100 ), and size of the circular tertiary
collimators
(inner diameters of 10¡­40 §®).

Results: The measurement error was less than 0.5% by Farmer chamber, 0.5% for 0.125 §¦ ion chamber, and less than 2% for diode detector for the fixed beam, single arc beam, and 5-arc beam setup.

Conclusion: We confirmed the accuracy of dose distribution with the radiosurgery system developed in our institute and the data from this study would be able to be effectively used for the improvement of quality assurance of stereotactic
radiosurgery or fractionated stereotactic radiotherapy system.

Å°¿öµå

Á¤À§¹æ»ç¼±¼ö¼ú; ÆÒÅè; ¼±·® Á¤È®µµ; Á¤µµ°ü¸®; Stereotactic radiosurgery; Phantom; Dose distribution; Quality assurance;

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