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Á÷Àå¾Ï ȯÀÚ¿¡¼­ ¹æ»ç¼±Ä¡·á½Ã Air-vacuum CushionÀÇ À¯¿ë¼º The Role of Air-Vacuum Cushion Device in Patients with Rectal Cancer in Radiation Therapy

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±è±âȯ/Ki Hwan Kim Á¶¹®ÁØ/°­³ëÇö/±èµ¿¿í/±èÁØ»ó/ÀåÁö¿µ/±èÀ缺/Moon June Cho/No Hyun Kang/Dong Wuk Kim/Jun Sang Kim/Ji Young Jang/Jae Sung Kim

Abstract

¸ñÀû: º» ¿¬±¸¿¡¼­´Â °ñ¹ÝºÎÀ§ ¹æ»ç¼±Ä¡·á ȯÀÚÁß Á÷Àå¾Ï ȯÀÚ¿¡¼­ °íÁ¤±â±¸·Î »ç¿ëÇÑ air-vacuum cushionÀÇ Á¶»ç¸éÀÇ º¯È­¿¡ µû¸¥ °íÁ¤±â±¸ÀÇ À¯¿ë¼ºÀ» ÈÄÇâÀûÀ¸·Î ºÐ¼®ÇÏ¿´´Ù. ´ë»ó ¹× ¹æ¹ý: Ãæ³²´ëÇб³º´¿ø Ä¡·á¹æ»ç¼±°ú¿¡¼­ 1998³â 8¿ùºÎÅÍ
1999³â
8¿ù±îÁö Á÷Àå¾ÏÀ¸·Î ¹æ»ç¼±Ä¡·á¸¦ ¹ÞÀº 20¸íÀÇ È¯ÀÚ¸¦ ´ë»óÀ¸·Î ÇÏ¿´´Ù. ȯÀÚµéÀº ¸ðµÎ º¹¿ÍÀ§ ÀÚ¼¼·Î Ä¡·á¸¦ ¹Þ¾Ò°í ´ëÁ¶±º 10¸í°ú ½ÇÇ豺 10¸íÀ¸·Î °¢°¢ ³ª´©¾î¼­ ¿¬±¸¸¦ ½ÇÇàÇÏ¿´´Ù. Àüü Ä¡·á°úÁ¤Áß EPID¸¦ ÀÌ¿ëÇÏ¿© ÈĸéÁ¶»ç¸éÀº xÃà(right-left),
yÃà(cranio-caudal)¿¡ ´ëÇÑ ¿µ»óÀ» ¾ò¾ú°í, Ãø¸éÁ¶»ç¸éÀº zÃà(anterior-posterior), yÃà(cranio-caudal)¿¡ ´ëÇÑ ¿µ»óÀ» ¾ò¾ú´Ù. Àüü Ä¡·á°úÁ¤ Áß ¾òÀº ¿µ»óµéÀ» ¸ðÀÇÄ¡·á½Ã ÃÔ¿µÇÑ ±âÁØÇʸ§°ú matching±â¹ýÀ» ÀÌ¿ëÇÏ¿© ¿ÀÂ÷¸¦ ÃøÁ¤ÇÏ¿´´Ù. Åë°èÀû À¯ÀǼº È®ÀÎÀº
t-°ËÁ¤¹ýÀ» »ç¿ëÇÏ¿´´Ù. °á°ú: ´ëÁ¶±º¿¡¼­ 10¸í ȯÀÚÀÇ Èĸé Á¶»ç¿µ¿ªÀÇ °æ¿ì xÃà, yÃà¿¡ ´ëÇÑ Æò±ÕÀ̵¿°ªÀº °¢°¢ 0.02 §®, 0.78 §®À̾ú°í °èÅë¿ÀÂ÷°ú ¿ì¿¬¿ÀÂ÷ÀÇ Ç¥ÁØÆíÂ÷°ªÀº °¢°¢ 2.13 §®, 2.40 §®¿Í 1.46 §®, 1.51 §®À̾ú´Ù. Ãø¸éÁ¶»ç¸é¿¡¼­ zÃà, yÃà¿¡
´ëÇÑ
Æò±ÕÀ̵¿°ªÀº °¢°¢ 2.96 §®, 0.47 §®À̾ú°í °èÅë¿ÀÂ÷¿Í ¿ì¿¬¿ÀÂ÷ÀÇ Ç¥ÁØÆíÂ÷´Â °¢°¢ 3.69 §®, 1.96 §®¿Í 2.79 §®, 1.48 §®À̾ú´Ù. ½ÇÇ豺 10¸í ȯÀÚÀÇ Èĸé Á¶»ç¸é¿¡¼­ xÃà, yÃà¿¡ ´ëÇÑ Æò±ÕÀ̵¿°ªÀº °¢°¢ -0.33 §®, 0.81 §®À̾ú°í °èÅë¿ÀÂ÷°ú ¿ì¿¬¿ÀÂ÷¿¡ ´ëÇÑ
Ç¥ÁØÆíÂ÷´Â
°¢°¢ 1.71 §®, 3.08 §®¿Í 1.40 §®, 1.88 §®À̾ú´Ù. Ãø¸éÁ¶»ç¸é¿¡¼­ zÃà, yÃà¿¡ ´ëÇÑ Æò±ÕÀ̵¿°ªÀº °¢°¢ 2.98 §®, 0.74 §®À̾ú°í °èÅë¿ÀÂ÷°ú ¿ì¿¬¿ÀÂ÷¿¡ ´ëÇÑ Ç¥ÁØÆíÂ÷´Â °¢°¢ 4.75 §®, 2.65 §®¿Í 2.69 §®, 1.86 §®À̾ú´Ù. º» ¿¬±¸¿¡¼­´Â ´ëÁ¶±º°ú ½ÇÇ豺°£ÀÇ
Á¶»ç¸é¿¡
´ëÇÑ
Æò±ÕÀ̵¿°ª°ú ¿ì¿¬¿ÀÂ÷´Â °ÅÀÇ ÀÏÄ¡ÇÏ¿´À¸³ª °èÅë¿ÀÂ÷´Â ½ÇÇ豺¿¡¼­ ´Ù¼Ò Å« °æÇâÀ» º¸¿´´Ù. ÈĸéÁ¶»ç¸é°ú Ãø¸éÁ¶»ç¸é¿¡¼­ air-vacuum cushion¿¡ ÀÇÇÑ Á¶»ç¸é º¯È­ÀÇ Åë°èÀû À¯ÀǼºÀÌ ¾ø¾ú´Ù. °á·Ð: Á÷Àå¾Ï ȯÀÚÀÇ ¹æ»ç¼± Ä¡·á½Ã °íÁ¤±â±¸·Î »ç¿ëÇÑ
air-vacuum
cushionÀÇ »ç¿ëÀÌ ¹æ»ç¼±Ä¡·áÀÇ Á¤È®µµ¿¡ ÀÌÀÍÀ» ÁÖÁö ¾Ê´Â °ÍÀ¸·Î »ý°¢µÈ´Ù.

Purpose: We analyzed setup errors induced by using air-vacuum cushion as immobilization device in patients with rectal cancer. Materials and methods: We had treated the twenty patients with rectal cancer by 6 MV, 10 MV X-ray from
Aug.
1998
to Aug. 1999 at Chungnam National University Hospital. All patients were treated at prone position. They were separated to two groups, control group, 10 patients using styrofoam, and test group, 10 patients using styrofoam and air-vacuum cushion.
We
measured errors of posterior field for x, y axis and lateral field for z, y axis with simulation film and EPID image using a matching technique. Results: In control group, the mean displacement values of pelvic bone landmark for x axis and
y
axis
were 0.02 §®. 0.78 §®, respectively and the standard deviations of systematic error were 2.13 §®, 2.40 §®, respectively and the standard deviation of random error were 1.46 §®. 1.51 §®, respectively. In test group, the mean displacement values of
x
axis
and y axis were -0.33 §®. 0.81 §®, respectively and the standard deviations of systematic error were 1.71 §®, 3.08 §®, respectively and the standard deviations of random errors were 1.40 §®. 1.88 §®, respectively. The mean displacement values of
z
axis
and y axis were 2.98 §®. 0.74 §®, respectively and the standard deviations of systematic error were 4.75 §®, 2.65 §®, respectively and standard deviations of random error were 2.69 §®. 1.86 §®, respectively. The statistical difference of field
size
by
using air vacuum cushion between two groups in posterior direction and lateral direction was not shown. Conclusion: We think that use of air-vacuum cushion may not be an advantage for improving setup accuracy in rectal cancer patients.

Å°¿öµå

°íÁ¤; ¹æ»ç¼±Ä¡·á; Á÷Àå¾Ï; Immobilization; Radiation therapy; Rectal neoplasms;

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