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ESTIMATION OF ABSORBED DOSE IN OCCLUSAL RADIOGRAPHY

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Abstract

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ÀÓ»óÀûÀ¸·Î ¸¹ÀÌ »ç¿ëÇÏ°í ÀÖ´Â ±³ÇÕÃÔ¿µ½ÃÀÇ µÎºÎ °¢ ºÎÀ§ÀÇ ¹æ»ç¼± Èí¼ö·®À» Æò°¡Çϱâ
À§ÇÏ¿© Ȳ»êÄ®½·(CaSO4) ¿­¹ß±¤¼±·®°è¸¦ phantom(RT-210 Head & Neck
SectionsR, Humanoid Systems Co., U.S.A.) ³»ºÎÀÇ Áß¿äÇÑ ÇغÎÇÐÀû ±¸Á¶¹°
10ºÎÀ§¸¦ Æ÷ÇÔÇÑ ÃÑ 12ºÎÀ§¿¡ À§Ä¡½ÃÄÑ 70kVp, 15mA »óÅ ÇÏ¿¡¼­ 8ÀÎÄ¡ Á¶»çÅë¿¡¼­´Â 1/4
ÃÊ, 16ÀÎÄ¡ Á¶»çÅë¿¡¼­´Â 1ÃÊ µ¿¾È X-¼±À» ³ëÃâ½ÃÄÑ »ó¾Ç ÀüÄ¡ºÎ ¹× ±¸Ä¡ºÎÀÇ ºÎºÐ¾Ç±³ÇÕ
ÃÔ¿µ, ÇϾÇÀüÄ¡ºÎ ¹× ±¸Ä¡ºÎÀÇ ´Ü¸é±³ÇÕÃÔ¿µ°ú ºÎºÐ¾Ç±³ÇÕÃÔ¿µ½ÃÀÇ ¹æ»ç¼± Èí¼ö·®À» Á¶»çÇÏ
¿© ¾Æ·¡¿Í °°ÀÌ °á°ú¸¦ ¾ò¾ú´Ù.
1. ÀüüÀûÀ¸·Î °¡Àå ³ôÀº ¹æ»ç¼± Èí¼ö·®À» º¸ÀÎ ºÎºÐÀº ÇǺÎÇ¥¸éÀ¸·Î½á 3264mrad¿¡¼­
4073mrad ¹üÀ§¿¡ ÀÖ¾úÀ¸¸ç °¢ ÃÔ¿µ¹ý¿¡¼­ÀÇ Â÷ÀÌ´Â Å©Áö ¾Ê¾Ò´Ù.
2. »ó¾ÇÀüÄ¡ºÎ ºÎºÐ¾Ç±³ÇÕÃÔ¿µ½Ã ¾È±¸, »ó¾Çµ¿, ³úÇϼöüºÎÀ§°¡ ´Ù¸¥ ºÎÀ§¿¡ ºñÇØ ¹æ»ç¼±
Èí¼ö·®ÀÌ ¸¹¾ÒÀ¸¸ç ÆíÃø »ó¾Ç±¸Ä¡ºÎ ºÎºÐ¾Ç±³ÇÕ ÃÔ¿µ¿¡¼­´Â Á¶»çÃø¾È±¸¿Í Á¶»çÃø»ó¾Çµ¿ºÎÀ§
¿¡ ¸¹Àº ¹æ»ç¼± Èí¼ö·®À» º¸¿´´Ù.
3. ÇϾÇÀüÄ¡ºÎ ´Ü¸é±³ÇÕÃÔ¿µ½Ã ¾È±¸ºÎÀ§¸¦ Á¦¿ÜÇÑ ¸ðµç ºÎÀ§¿¡¼­ ºñ±³Àû ³·Àº ¹æ»ç¼± Èí
¼ö·®À» º¸¿´´Ù.
4. ÆíÃø ÇϾDZ¸Ä¡ºÎ ´Ü¸é±³ÇÕÃÔ¿µ½Ã Á¶»çÃø ¾È±¸ºÎÀ§¿Í Á¶»çÃø»ó¾Çµ¿ ºÎÀ§¿¡¼­ ´Ù¸¥ ºÎÀ§
¿¡ ºñÇÏ¿© »ó´ëÀûÀ¸·Î ³ôÀº ¹æ»ç¼± Èí¼ö·®À» º¸¿´´Ù.
5. ÇϾÇÀüÄ¡ºÎ ºÎºÐ¾Ç±³ÇÕÃÔ¿µ½Ã ¾çÃø»ó¾Çµ¿, ¾çÃø¾ÇÇϼ±, °©»ó¼±ºÎÀ§¿¡¼­ ´Ù¸¥ ºÎÀ§¿¡ ºñ
ÇÏ¿© ³ôÀº ¹æ»ç¼± Èí¼ö·®À» º¸¿´´Ù.
6. ÆíÃø ÇϾDZ¸Ä¡ºÎ ºÎºÐ¾Ç±³ÇÕÃÔ¿µ½Ã Á¶»ç Ãø¾ÇÇϼ±ºÎÀ§¿¡¼­ ´Ù¸¥ ºÎÀ§¿¡ ºñÇÏ¿© ³ôÀº
¹æ»ç¼± Èí¼ö·®À» ³ªÅ¸³»¾ú°í ¹Ý´ëÃø¾È±¸¿¡¼­µµ »ó´ëÀûÀ¸·Î ³ôÀº ¹æ»ç¼± Èí¼ö·®À» º¸¿´´Ù.
#ÃÊ·Ï#
The purpose of this study was to estimate absorbed dose of each important anatomic
site of phantom (RT-210 Head & Neck SectionR, Humanoid Systems Co.,
U.S.A.) head in occlusal radiography. X-radiation dosimetry at 12 anatomic sites in
maxillary anterior topography, maxillary posterior topography, mandibular anterior
cross-section, mandibular posterior cross-section, mandibular anterior topographic,
mandibular posterior topographic occlusal projection was performed with calcium sulfate
thermoluminescent dosimeters under 70 Kvp and 15 mA, l/4 second (8 inch cone) and 1
second (16 inch cone) exposure time.
The results obtained were as follows:
Skin surface produced highest absorbed dose ranged between 3264 mrad and 4073
mrad but there was little difference between projections.
In maxillary anterior topographic occlusal radiography, eyeballs, maxillary sinuses, and
pituitary gland sites produced higher absorbed doses than those of other sites. In
maxillary posterior topographic occlusal radiography, exposed eyeball site and exposed
maxillary sinus site produced high absorbed doses.
In mandibular anterior cross-sectional occlusal radiography, all sites were produced
relatively low absorbed dose except eyeball sites.
In mandibular posterior cross-sectional occlusal radiography, exposed eyeball site and
exposed maxillary sinus site were produced relatively higher absorbed doses than other
sites.
In mandibular anterior topographic occlusal radiography, maxillary sinuses,
submandibular glands, and thyroid gland sites produced high absorbed doses than other
sites.
In mandibular posterior topographic occlusal radiography, submandibular gland site of
the exposed side produced high absorbed dose than other sites and eyeball site of the
opposite side produced relatively high absorbed dose.

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