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Abstract

¸ñÀû: Çѱ¹ÀÎ ¼Ò¾ÆÀÇ ¹Ì¼¼ÇÑ Á᫐ µÎ°³±âÀú°øÀ» Àü»êÈ­´ÜÃþÈ°¿µ¼úÀ» ÀÌ¿ëÇÏ¿© °üÂû ºÐ¼®ÇÔ
À¸·Î½á µÎ°³±âÀú°øÀÇ Á¤»ó ¹ß´Þ °úÁ¤°ú º¯À̸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.
´ë»ó ¹× ¹æ¹ý: µÎ°³³» ¹× µÎ°³±âÀú¿¡ ÁúȯÀÌ ¾ø´Â 16¼¼ ÀÌÇÏÀÇ ¼Ò¾ÆÁß CT¸¦ ÃÔ¿µÇÑ 114¸í
À» ´ë»óÀ¸·Î ÇÏ¿´´Ù. CT´Â 1mmÀÇ ÀýÆí µÎ²²·Î °í°ø°£Çػ󿬻ê¹ý(high spatial frequency
algorithm)À» »ç¿ëÇÏ¿© ´ëÈĵΰø¿¡¼­ºÎÅÍ ¾È¿Í õÀå±îÁö Ⱦ´Ü½ºÄµÀ» ½ÃÇàÇÏ¿´´Ù. CTºÐ¼®Àº
anterior presphenoidal foramen(APF), posterior presphenoidal foramen(PPF), rostro-orbital
pseudoforamen(ROP), intralateromedial postsphenoidal pseudoforamen(LLP),
intrapostsphenoidal pseudoforamen(IPP), spheno-occipital pseudoforamen(SOP), canalis
basilaris medianus(CBM) ¹× intrasynchondral ossified bodies(IOB)ÀÇ ¿¬·Éº° Á¸Àç À¯¹«¸¦
ºÐ¼®ÇÏ¿´´Ù. ÀÌ·¯ÇÑ ¹Ì¼¼ µÎ°³±âÀú°øÀº 2°³ ÀÌ»óÀÇ ½ºÄµ ´Ü¸é¿¡¼­ ÇغÎÇÐÀûÀ¸·Î ¿¹»óµÇ´Â
À§Ä¡¿¡ ȯÇüÀÇ ±¸Á¶¹°ÀÌ °üÂûµÉ ¶§ °ø ¶Ç´Â ±â°øÀÌ Á¸ÀçÇÑ´Ù°í ÆÇÁ¤ÇÏ¿´°í IOB´Â Á¢ÇüÈĵÎ
¿¬°ñ°áÇÕ(spheno-occipital synchondrosis)³»¿¡ Á¡ ȤÀº ¼±»óÀÇ °íÀ½¿µ±¸Á¶¹°ÀÌ º¸ÀÏ ¶§ Á¸
ÀçÇÑ´Ù°í ÆÇÁ¤ÇÏ¿´´Ù.
°á°ú: APFÀº ÁÖ·Î 1¼¼¹Ì¸¸ÀÇ ¼Ò¾Æ(16/17, 94%)¿¡¼­ °üÂûµÇ¸ç, PPFÀº 2¼¼¹Ì¸¸ÀÇ ¼Ò¾Æ(27/37,
73%)¿¡¼­, ROPÀº 2-5¼¼ÀÇ ¼Ò¾Æ(31/34, 91%)¿¡¼­, LPPÀº 1¼¼¹Ì¸¸ÀÇ ¼Ò¾Æ(9/17, 53%)¿¡¼­ ±×
¸®°í IPPÀº 6-12¼¼ÀÇ ¼Ò¾Æ(20/37, 54%)¿¡¼­ ÁÖ·Î °üÂûµÇ¾ú´Ù. SOPÀº ÁÖ·Î 13¼¼ÀÌ»óÀÇ ¿¬·É
(3/6, 50%)¿¡¼­ °üÂûµÇ¾úÀ¸¸ç, IOB´Â ÁÖ·Î 13¼¼À̻󿡼­ °üÂûµÇ¸ç 8¼¼ÀÌÇÏÀÇ ¼Ò¾Æ¿¡¼­´Â °ü
ÂûµÇÁö ¾Ê¾Ò´Ù. CBM´Â ¸ðµç ¿¬·É´ë¿¡¼­ 20%³»¿Ü·Î °í¸£°Ô °üÂûµÇ¾ú´Ù.
°á·Ð: ¹Ì¼¼ÇÑ Á᫐ µÎ°³±âÀú°øÀÇ ¹ß´Þ°úÁ¤Àº ¿¬·Éº°·Î ´Ù¾çÇÑ º¯À̸¦ º¸¿´À¸¸ç ÀÌ·¯ÇÑ Á¤»ó
º¯ÀÌ¿¡ ´ëÇÑ Áö½ÄÀº º¹ÀâÇÑ µÎ°³±âÀúºÎ ÇغÎÇÐÀ» ÀÌÇØÇÏ°í ºñÁ¤»óÀû º¯È­¸¦ ÆÇ´ÜÇϴµ¥ µµ
¿òÀÌ µÉ °ÍÀ¸·Î »ç·áµÈ´Ù.
#ÃÊ·Ï#
Purpose : To evaluate the CT appearance of normal variations in the minute central
skull base foramina in infants and children.
Materials and Methods : One hundred and fourteen children under the age of 17years
without skull base abnormality underwent CT scanning. A high spatial frequency
algorithm was used, and contiguous axial scanning parallel to the orbitomeatal line was
performed from the foramen magnum to the orbital roof, with a 1mm slice thickness.
The presence or absence of eight foramina, pseudoforamina, or ossification centers
including anterior presphenoidal foramen, posterior presphenoidal foramen, rostro-orbital
pseudoforamen, intralateromedial postsphenoidal pseudoforamen, intrapostsphenoidal
pseudoforamen, spheno-occipital pseudoforamen, canalis basilaris medianus and
intrasynchondral ossified bodies was analysed according to age. The presence of
foramina or pseudoforamina was indicated if a ring-shaped structure was seen on two
or more CT scans at the location anatomically predicted, and intrasynchondral ossified
bodies were indicated if linear or dot-like structures with high attenuation accompanied
spheno-occipital synchondrosis.
Results : CT indicated that within a certain age range, various kinds of foramina,
pseudoforamina, and ossification centers were frequent. The anterior presphenoidal
foramen was most commonly seen in infants aged 1-12 months (16/17, 94%); the
posterior presphenoidal toramen in children less than 2 years old(27/37, 73%); the
rostro-orbital pseudoforamen in children aged 2-5 years(9/17, 53%); intrapostsphenoidal
pseudoforamen in children 6-12 years old(20/37, 54%) and spheno-occipital
pseudoforamen and intrasynchondral ossified bodies in children aged 13-16years. The
canalis basilaris medianus was identified in about 20% of all subjects regardless of age.
Conclusion : Development of the minute central skull base foramina varied greatly
according to age. Knowledge of the CT appearances of such embryologic variants of the
central skull base should not only help Provide an understanding of complex skull base
anatomy but also identify abnormal skull base development.

Å°¿öµå

skull CT; Computed tomography(CT) in infants and children; Mormal variant;

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