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Abstract

¸»ÃʽŰ溴ÁõÀÇ Áø´ÜÀ» À§ÇØ MR neurographyÀÇ »ç¿ëÀÌ Á¡Â÷ Áõ°¡ÇÏ°í ÀÖ´Ù. °í´ëÁ¶µµ¿Í °íÇػ󵵷Π¸»ÃʽŰæÀ» Á÷Á¢ ¿µ»óÈ­ÇÑ MR ¿µ»óÀ» MR neurography¶ó°í ÇÏ°í, Áö¹æ¾ïÁ¦ T2 °­Á¶¿µ»ó°ú È®»ê°­Á¶¿µ»óÀÌ ÈçÈ÷ »ç¿ëµÇ´Â ½ÃÄö½ºÀÌ´Ù. ÀÛÀº Á÷°æ, º¹ÀâÇÑ ÇغÎÇÐÀû ±¸Á¶¸¦ °¡Áø ¸»ÃʽŰæÀ» ÇÕ¸®Àû ½Ã°£ ¾È¿¡ ¿µ»óÈ­Çϱâ À§Çؼ­ ÃÖ½ÅÀÇ isotropic 3Â÷¿ø ±â¹ý, ´Ù¾çÇÑ °í¼Ó¿µ»ó±â¹ý, post-processing ¿µ»ó ±â¹ý µîÀÌ »ç¿ëµÈ´Ù. ÀÌ·± ¹ßÀüµé·Î ÀÎÇØ MR neurography°¡ À¯¿ëÇÏ°Ô »ç¿ëµÇÁö¸¸ Ç×»ó ÀûÀýÇÑ MR neurography ¿µ»óÀ» ¾òÀ» ¼ö ÀÖ´Â °ÍÀº ¾Æ´Ï´Ù. ÀûÀýÇÑ MR neurography ¿µ»óÀ» ¾ò±â À§ÇØ ¿µ»óÀÇÇаú Àǻ簡 °í·ÁÇØ¾ß ÇÒ ´ÙÀ½ÀÇ ¸î°¡Áö ÀïÁ¡µéÀÌ ÀÖ´Ù. ÀÌ¿¡´Â ÀûÀýÇÑ Ç¥ÁØ ÇÁ·ÎÅäÄÝÀÇ ¼±Ã¥, Áö¹æ¾ïÁ¦ ±â¹ýÀÇ ¼±ÅÃ, ÇØ»óµµ¿Í field of view¿Í slice thickness °£ÀÇ »óÈ£ °ü°èÀÇ ÀÌÇØ, ÀûÀýÇÑ post-processing ¿µ»ó ±â¹ýÀÇ Àû¿ë, 2Â÷¿ø ¿µ»óȹµæ ±â¹ý°ú 3Â÷¿ø ¿µ»óȹµæ ±â¹ýÀÇ Àå´ÜÁ¡, ±ÙÀ§ºÎ ¸»ÃʽŰæ°ú ¸»´ÜºÎ ¸»ÃʽŰæÀÇ T2 ´ëÁ¶µµÀÇ Â÷ÀÌ, ¸»ÃʽŰ濡 ÀÎÁ¢ÇÑ Á¤¸ÆÀÌ MR neurography¿¡ ¹ÌÄ¡´Â ¿µÇâ, È®»ê°­Á¶¿µ»ó¿¡¼­ ±âÇÏÇÐÀû ¿Ö°îÀÇ ¹ß»ý°ú ÀûÀýÇÑ b valueÀÇ ¼±Åà µîÀÌ´Ù. ÀÌ·± ÀïÁ¡µéÀ» Àß ÀÌÇØÇÏ´Â °ÍÀÌ °æÇèÀÌ ÀûÀº ¿µ»óÀÇÇаú Àǻ簡 ÀûÀýÇÑ MR neurography ¿µ»óÀ» ¾ò°í, ¸»ÃʽŰ溴ÁõÀ» Á¤È®È÷ Æò°¡ÇÏ´Â µ¥ ¸¹Àº µµ¿òÀÌ µÉ °ÍÀÌ´Ù.

Magnetic resonance neurography (MRN) has been increasingly used in recent years for the assessment of peripheral neuropathies. Fat suppression T2-weighted imaging (T2WI) and diffusion-weighted imaging (DWI) have typically been used to provide high contrast MRN. Isotropic 3-dimensional (3D) sequences with fast spin echo, post-processing imaging techniques, and fast imaging methods, among others, allow good visualization of peripheral nerves that have a small diameter, complex anatomy, and oblique course within a reasonable scan time. However, there are still several issues when performing high contrast and high resolution MRN including standard sequence; fat saturation techniques; balance between resolution, field of view, and slice thickness; post-processing techniques; 2D vs. 3D image acquisition; different T2 contrasts between proximal and distal nerves; high T2 signal intensity of adjacent veins or joint fluid; geometric distortion; and appropriate p-values on DWI. The proper understanding of these issues will help novice radiologists evaluate peripheral neuropathies using MRN.

Å°¿öµå

Peripheral Nervous System Diseases; Diagnostic Imaging; Magnetic Resonance Imaging

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