Àá½Ã¸¸ ±â´Ù·Á ÁÖ¼¼¿ä. ·ÎµùÁßÀÔ´Ï´Ù.

»ê¶õ ¹æ»ç¼±ÀÌ Ä¡°ú¿ë ¹æ»ç¼± Çʸ§¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ °üÇÑ ¿¬±¸

A STUDY ON THE SCATTER RADIATION AFFECTING THE DENIAL X-RAY FILM

Ä¡°ú¹æ»ç¼± 1992³â 22±Ç 1È£ p.87 ~ 94
¹ÚÀÀõ, ±èÀç´ö,
¼Ò¼Ó »ó¼¼Á¤º¸
¹ÚÀÀõ (  ) - Á¶¼±´ëÇб³ ±¸°­¾Ç¾È¸é¹æ»ç¼±ÇÐ ±³½Ç
±èÀç´ö (  ) - Á¶¼±´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°ú¹æ»ç¼±Çб³½Ç

Abstract

ÀúÀÚ´Â pinhole camera¸¦ ÀÌ¿ëÇÏ¿© Ä¡¾Æ¿Í ¿¬Á¶Á÷ ºÎÀ§¿¡ Àå½Ã°£ ¹æ»ç¼±À» Á¶»çÇØ º½À¸·Î
½á ½ÇÁ¦ »ê¶õ ¹æ»ç¼±ÀÌ Ä¡°ú¿ë Çʸ§¿¡ ¿µÇâÀ» ¹ÌÄ¡´ÂÁö¿¡ ´ëÇØ pinhole camera¿Í ¿Î½º·Î ÇÇ
º¹ÇÑ µÎ°³°ñÀ» ÀÌ¿ëÇÏ¿© °üÀü¾Ð ¹× ³ëÃâ½Ã°£À» ´Ù¾çÇÏ°Ô º¯È­½ÃÄÑ ¹æ»ç¼±À» Á¶»çÇÏ°í, ±¸³»
Ç¥ÁØ Çʸ§ ÃÔ¿µ½Ã °©»ó¼±¿¡ »ê¶õ ¹æ»ç¼±ÀÌ ¾î´À Á¤µµ ¿µÇâÀ» ¹ÌÄ¡´Â°¡¸¦ pocket dosimeter
¸¦ ÀÌ¿ëÇÏ¿© Æò°¡ÇØ º» °á°ú ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. Pinhole camera´Â ¹æ»ç¼±ÀÇ ±Ù¿øÀ» ¼³Á¤Çϴµ¥ À¯¿ëÇÑ ÀåÄ¡ÀÌ´Ù.
2. 5½Ã°£ ÀÌ»ó Àå½Ã°£ ¹æ»ç¼± Á¶»ç½Ã Ä¡°ú¿ëÇʸ§¿¡¼­ »ê¶õ ¹æ»ç¼±¿¡ ÀÇÇÑ ÈæÈ­»óÀÌ À°¾È
ÀûÀ¸·Î °üÂûµÇ¾ú´Ù.
3. ³ëÃâ½Ã°£ÀÌ ÂªÀº Ä¡°ú ¹æ»ç¼±¿¡ ÀÇÇØ ¾ß±âµÇ´Â »ê¶õ ¹æ»ç¼±Àº Ä¡°ú¿¡¼­ »ç¿ëÇÏ°í ÀÖ´Â
Çʸ§ÀÇ Áø´ÜÇÐÀû Áú¿¡ Å« ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê¾Ò´Ù.
4. ³ëÃâ½Ã°£¿¡ µû¸¥ Ä¡¾Æ¿Í ¿¬Á¶Á÷ °£ÀÇ ÈæÈ­µµÀÇ Â÷ÀÌ´Â 70kVp Á¶°ÇÇÏ¿¡¼­ 5½Ã°£ Á¶»ç
½Ã¿¡´Â 0.16, 10½Ã°£ Á¶»ç½Ã¿¡´Â 0.17À̾ú°í, 90kVp Á¶°ÇÇÏ¿¡¼­ 5½Ã°£ Á¶»ç½Ã¿¡´Â 0.12, 10½Ã
°£ Á¶»ç½Ã¿¡´Â 0.13À̾ú´Ù.
5. °üÀü¾Ð Á¶°Ç¿¡ µû¸¥ Ä¡¾Æ¿Í ¿¬Á¶Á÷ °£ÀÇ ÈæÈ­µµÀÇ Â÷ÀÌ´Â °üÀü¾Ð 70kVp¿¡¼­ Ä¡¾Æ¿¡ 5
½Ã°£°ú 90kVp¿¡¼­ ¿¬Á¶Á÷¿¡ 5½Ã°£ Á¶»ç½ÃÀÇ ÈæÈ­µµÀÇ Â÷ÀÌ´Â ¾ø¾úÀ¸³ª 10½Ã°£ Á¶»ç½Ã¿¡´Â
70kVp Á¶°ÇÇÏ¿¡¼­ Ä¡¾Æ¿¡ Á¶»çÇÑ ÈæÈ­µµ°¡ 0.05 ³ô¾Ò´Ù.
6. ¿øÅëÇü ±Ý¼Ó Á¶»çÅëÀÇ ÀåÂø À¯¹«¿¡ µû¸¥ ÈæÈ­µµÀÇ Â÷ÀÌ´Â ¾ø¾ú´Ù.
7. ÈÄ¹æ »ê¶õ ¹æ»ç¼±Àº 3ºÐ¸¸¿¡ ÈÄ¹æ ¹°Ã¼¸¦ Çʸ§»ó¿¡ Àαâ½ÃÄ×´Ù.
8. ±¸³» Ç¥ÁØ Çʸ§ ÃÔ¿µ½Ã °©»ó¼±ÀÌ »ê¶õ ¹æ»ç¼±¿¡ ÀÇÇØ ³ëÃâµÇ´Â ¾çÀº »ó¾Ç ÀüÄ¡ºÎ´Â
1.13, ±¸Ä¡ºÎ´Â 0.55, ÇÏ¾Ç ÀüÄ¡ºÎ´Â 1.25, ±¸Ä¡ºÎ´Â 1.92 mrÀ̾ú´Ù.
#ÃÊ·Ï#
The purpose of this study was to evaluate the effect of scatter radiation to dental
x-ray film with long time-exposure in the different structures of the tooth, by using
pinhole camera.
For this study, pinhole camera, skull with tooth, and pocket dosimeter were used.
The radiation with 70 and 90 kVp and exposure time (minimum: 2.5 min., maximum
10 hrs.)was projected to the film in the pinhole camera. And density of the obtained
x-ray film was measured with densitometer.
In the intra-oral film taking, the amount of exposure of the scatter radiation affecting
the thyroid gland area was measured with the dosimeter at the thyroid gland.
The density of radiographs was compared in radiation projected with or without the
metal cone of dental machine. The effect of the back scatter radiation to the film was
also evaluated when the lead foil was removed.
The obtained results were as follows:
1. A pinhole camera was a valuable device for locating the source of x-ray.
2. The scatter radiation affected the dental x-ray film when the radiation source was
exposed more than 5 hours'. In that case, the density of the scatter radiation could be
observed visually.
3. The scatter radiation caused by short exposure of dental radiation didn't affect the
diagnostic quality of the dental x-ray film.
4. The differences of densities between the tooth and the soft tissue according to
exposure time showed 0.16 in 5 hours' exposure & 0.17 in 10 hours' exposure at 70
kVp & 0.12 in 5 hours' exposure & 0.13 in 10 hours' exposure at the 90 kVp.
5. The differences of densities between the tooth and the soft tissue according to kVp
showed no difference between 5 hours' exposure of tooth at 70 kVp and soft tissue at
90 kVp, but showed 0.05 high density in tooth when 10 hours' exposure at 90 kVp.
6. No difference of density was on radiographs taken with or without dental machine
cone.
7. Back scatter radiation was recorded image of radiographs for only 3 min.
8. The amounts of the scatter radiation exposed to the thyroid gland in intraoral film
taking were 1 12 mr in upper anterior, 0.55 mr in upper posterior, 2,75 mr in lower
anterior, and 1.92 mr in lower posterior teeth.

Å°¿öµå

¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸

  

µîÀçÀú³Î Á¤º¸