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AN EXPERIMENTAL STUDY ON THE CHANGE OF BONE MIIMERAL METABOLISM AFTER IRRADIATION

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Abstract

¹æ»ç¼±Á¶»ç ÈÄ ±¹¼ÒÀûÀ¸·Î ¹ß»ýÇÏ´Â °ñÁ¶¼ÛÁõ¿¡¼­ dual photon absorptiometry¹ýÀ¸·Î °ñ
¹«±âÁúÇÔ·®À» ÃøÁ¤ÇÏ°í Tc-99m MDPÀ» ÀÌ¿ëÇÑ °ñ½ºÄµ¿µ»ó¿¡¼­ ±¹¼ÒÇ÷·ù·® ¹× °ñ¹«±âÁú
´ë»çÀÇ º¯È­¸¦ °üÂûÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. Tc-99m MDPÁÖ»ç ÈÄ 5ºÐÀÇ ¿äÃßÀÇ ¹æ»ç´ÉÀº ¹æ»ç¼±Á¶»ç ÈÄ 8ÁÖ¿¡ 30GyÁ¶»ç±º¿¡¼­¸¸
°¨¼ÒµÇ¾ú´Ù.
2. Tc-99m MDPÁÖ»ç ÈÄ 2½Ã°£¿¡ ¿äÃßÀÇ ¹æ»ç´ÉÀº l0GyÁ¶»ç±º¿¡¼­´Â 4ÁÖ ¹× 6ÁÖ¿¡ À¯ÀÇ
ÇÏ°Ô °¨¼ÒµÇ´Ù°¡ ±× ÈÄ È¸º¹µÇ¾úÀ¸¸ç 20Gy Á¶»ç±º¿¡¼­´Â 6ÀÏ¿¡¼­ºÎÅÍ °¨¼ÒµÇ±â ½ÃÀÛÇÏ¿© 4
ÁÖ¿¡ ÃÖÀúÄ¡¿¡ À̸¥ ÈÄ È¸º¹µÇ¾ú´Ù.
3. °ñ¹«±âÁúÇÔ·®ÀÇ º¯È­´Â ´ÜÀ§¸éÀû´ç °ñ¹«±âÁú ÇÔ·®º¸´Ù ´ÜÀ§±æÀÌ´ç °ñ¹«±âÁúÇÔ·®ÀÌ ´õ
½ÉÇÏ°Ô °¨¼ÒµÇ¾úÀ¸¸ç ±× ¾ç»óÀº Tc-99m MDPÁÖ»çÈÄ 2½Ã°£ÀÇ °ñ¼·Ãë Á¤µµ¿Í °°¾Ò´Ù.
4 ¹æ»ç¼±Á¶»ç ÈÄ °ñ¹«±âÁúÇÔ·®ÀÌ °¨¼ÒµÈ ¿äÃß¿¡¼­ ¿¬°ñÅðÈ­ ¹× °ñ¼ÛÁ¶ÁõÀÇ º´¸®Á¶Á÷ÇÐÀû
¼Ò°ßÀÌ °üÂûµÇ¾úÀ¸¸ç ±× Á¤µµ´Â Á¶»ç¼±·®ÀÌ Å¬¼ö·Ï ½ÉÇÏ¿´´Ù.
ÀÌ»óÀÇ °á°ú¿Í °°ÀÌ °ñ¹ÐµµÃøÁ¤¹ý°ú °ñ½ºÄµ¹ýÀ» ÀÌ¿ëÇÏ¿© ¹æ»ç¼±Á¶»ç ÈÄ Á¶°ñ´ÉÀÌ °¨¼ÒµÇ
°í, °ñ¹«±âÁúÇÔ·®ÀÌ °¨¼ÒµÇ´Â °ÍÀ» °üÂûÇÏ¿´À¸¸ç º´¸®Á¶Á÷¼Ò°ßÀ¸·Îµµ °ñ¼ÛÁ¶ÁõÀÌ È®ÀεǾú
´Ù. µû¶ó¼­ ¹æ»ç¼±°ñ ±«»çÁõÀÌ ¿¹ÃøµÇÁö ¾Ê´Â ÀúÁ¶»ç¼±·®¿¡¼­µµ °ñ¼ÛÁ¶ÁõÀÌ ¹ß»ýµÇ´Â °ÍÀ»
¾Ë¼ö ÀÖ¾ú´Ù.

Irradiation is widely used for the treatment of malignant diseases, and possibly cause
the osteoporosis. The bone densitometry and bone scintigraphy are valuable when used
to monitor the patients longitudinally to access the progression of osteoporosis and risk
of osteoradionecrosis.
To evaluate the osteoporosis after irradiation of cobalt-60 gamma ray on the lumbar
spines of New Zealand white rabbits, bone densitometry by dual photon absorptiometry
and bone scintigraphy were performed weekly. The decrease of bone density began at
the first week after irradiation, and were in the nadir at 4-6th week. The osteoblastic
activity measured by bone scintigraphy decreased in the first week, and was in the
nadir at 4-6th week. The severity of these changes were related to the radiation dose.
In conclusion, the osteoporosis before presentation of the osteoradionecrosis can be
developed at low dose irradiation and confirmed by bone densitometry, bone scanning,
and histopathology.

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