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Abstract

¸ñ Àû : ¹æ»ç¼± ¹æ±¤¿° ¹× ¹æ»ç¼± Á÷Àå¿°Àº ÀڱðæºÎ¾ÏÀÇ ¹æ»ç¼± Ä¡·á½Ã¿¡ ÈçÈ÷ ¹®Á¦°¡
µÇ´Â ¸¸¼º ºÎÀÛ¿ëÀÌ´Ù. ÀúÀÚµéÀº ÀڱðæºÎ¾ÏÀÇ Àڱà °­³» ¹æ»ç¼±Ä¡·á½Ã¿¡ Á÷Àå°ú ¹æ±¤ÀÇ ¹æ
»ç¼±·®À» ÁÙÀÏ ¼ö Àִ ȯÀÚÀÇ Ä¡·áÀÚ¼¼¸¦ ±Ô¸íÇÏ°íÀÚ ÇÏ¿´´Ù.
´ë»ó ¹× ¹æ¹ý : 13¿¹ÀÇ È¯ÀÚ¿¡¼­ ȯÀÚÀÇ ¹æ±¤°ú Á÷Àå¿¡ µµ´¢°üÀ» »ðÀÔÇÑ ÈÄ¿¡ Á¶¿µÁ¦·Î
ÆØ´ëºÎ¸¦ ÆØ´ëÇÑ´Ù. tandem°ú µÎ °³ÀÇ ovoid¸¦ »ðÀÔÇÑ ÈÄ¿¡ ¼â¼®À§¿Í ¾Ó¿ÍÀ§¿¡¼­
semi-orthogonal ·Î AP, Lat »çÁøÀ» ÃÔ¿µÇÑ´Ù. »çÁø¿¡¼­ ICRU Report 38 ±ÇÀåÀ» ¾à°£ º¯°æ
ÇÑ ¹æ¹ý¿¡ µû¶ó ¹æ±¤°ú Á÷ÀåÀÇ ´ëÇ¥Á¡À» ±¸ÇÏ°í A point ÀÇ ¹æ»ç¼±·®ÀÌ 400cGyÀÏ ¶§ÀÇ ¹æ
±¤°ú Á÷ÀåÀÇ ¹æ»ç¼±·®À» °¢ Ä¡·áÀÚ¼¼¿¡¼­ ±¸ÇÑ´Ù. ¶ÇÇÑ cervical os ·ÎºÎÅÍ ¹æ±¤°ú Á÷Àå±îÁö
ÀÇ °Å¸®µµ °¢°¢ °è»êÇÑ´Ù.
°á °ú : Á÷Àå ¹æ»ç¼±·®ÀÇ Æò±ÕÀº ¼â¼®À§¿¡¼­ 240.7cGy ¾Ó¿ÍÀ§¿¡¼­ 278.3cGy¿´°í ¹æ±¤ ¹æ
»ç¼±·®ÀÇ Æò±ÕÀº ¼â¼®À§¿¡¼­ 303.5cGy ¾Ó¿ÍÀ§¿¡¼­ 255.8cGy ¿´´Ù. ¼â¼®À§ÀÇ Á÷Àå¼±·®ÀÌ ¾Ó
¿ÍÀ§ÀÇ Á÷Àå¼±·®º¸´Ù ÇÑ°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô ³·¾Ò°í, ¼â¼®À§ÀÇ ¹æ±¤¼±·®Àº ¾Ó¿ÍÀ§ÀÇ ¹æ±¤¼±·®
º¸´Ù À¯ÀÇÇÏ°Ô ³ô¾Ò´Ù. ÀڱðæºÎÀÇ external os ·ÎºÎÅÍ Á÷Àå±îÁöÀÇ Æò±Õ°Å¸®´Â ¼â¼®À§¿¡¼­
35.2§® ¾Ó¿ÍÀ§¿¡¼­ 32.3§® ¿´°í, ÀڱðæºÎÀÇ external os ·ÎºÎÅÍ ¹æ±¤±îÁöÀÇ Æò±Õ°Å¸®´Â ¼â¼®
À§¿¡¼­ 30.4§® ¾Ó¿ÍÀ§¿¡¼­ 34.0§® ¿´´Ù. Á÷Àå±îÁöÀÇ °Å¸®´Â ¼â¼®À§ÀÇ °æ¿ì°¡ ¾Ó¿ÍÀ§º¸´Ù À¯
ÀÇÇÏ°Ô ¸Ö¾ú°í, ¹æ±¤±îÁöÀÇ °Å¸®´Â ¼â¼®À§ÀÇ °æ¿ì°¡ ¾Ó¿ÍÀ§º¸´Ù À¯ÀÇÇÏ°Ô °¡±î¿ü´Ù.
°á ·Ð : ÀڱðæºÎ¾ÏÀÇ °­³»Ä¡·á ½Ã ¼â¼®À§·Î Ä¡·áÇÒ °æ¿ì Á÷Àå¼±·®À» ÁÙÀÏ ¼ö ÀÖ¾ú°í ¾Ó
¿ÍÀ§·Î Ä¡·áÇÒ °æ¿ì ¹æ±¤¼±·®À» ÁÙÀÏ ¼ö ÀÖ¾ú´Ù.

Purpose : Radiation proctitis and radiation cystitis are frequent and problematic late
complications in patients treated with radiation for the uterine cervix cancer. Authors
tried to find out the better patient's position in high dose rate intracavitary radiation to
reduce the radiation dose of bladder and rectum.
Materials and Methods : In 13 patients, Foley catheters were inserted to patients'
bladder and rectum and were ballooned with radioopaque dye. After insertion of a
tandem and two ovoids, semi-orthogonal anteroposterior and lateral films were taken in
both lithotomy and supine position. The rectal point and bladder point were defined
according to the criteria recommended in the ICRU Report 38 with modification. Using
these films, all patients' bladder and rectal dose were calculated in both positions (the
radiation dose of A point was set to 400 cGy). And also, the distance of bladder and
rectum from uterine cervical os was calculated in both positions.
Results : The average radiation dose of rectum was 240.7 cGy in lithotomy position
and 278.3 cGy in supine position, and the average radiation dose of bladder was 303.5
cGy in lithotomy position and 255.8 cGy in supine position. After the paired t-test, the
radiation dose of rectum in lithotomy position was marginally significantly lower than
that in supine position, while the radiation dose of bladder in lithotomy position was
significantly higher than that in supine position. On the other hand, the average distance
between rectum and cervical os was 35.2§® in lithotomy position and 32.3§® in supine
position. and the average distance between bladder and cervical os was 30.4§® in
lithotomy position and 34.0§® in supine position .After the paired t-test, the distance
between rectum and cervical os in lithotomy position was significantly longer than that
in supine position, while the distance between bladder and cervical os in lithotomy
position was significantly shorter than that in supine position.
Conclusion : The radiation dose of bladder can be reduced in supine position and the
radiation dose of rectum can be reduced in lithotomy position, so we can choose
appropriate position in each patient.

Å°¿öµå

Intracavitary radiation; Rectal dose; Bladder dose; Patient's position;

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