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CT Generation and Reconstruction

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1. Introduction (CT, ramp filter¿¡ ´ëÇÑ ¼³¸í)

2. Analysis (CT Projection Process, Back projection, Ramp filtering..)

3. Reference

4. Matlab Code

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1. Introduction (CT, ramp filter¿¡ ´ëÇÑ ¼³¸í)

CT(Computed Tomography)´Â X-¼± ȸÀü ±â¹ýÀ» Ȱ¿ëÇÏ¿© ½Åü ³»ºÎÀÇ ´Ü¸é À̹ÌÁö¸¦ »ý¼ºÇÏ´Â ±â¼úÀÌ´Ù. ÀÌ ±â¼úÀº ÀϹÝÀûÀÎ X-¼± ÃÔ¿µÀÌ ´ÜÀÏ Æò¸é¿¡¼­ À̹ÌÁö¸¦ »ý¼ºÇÏ´Â ¹Ý¸é, CT´Â ¿©·¯ °¢µµ¿¡¼­ ÃÔ¿µÇÑ X-¼±À» ¼öÁýÇÏ¿© 3Â÷¿øÀûÀÎ Á¤º¸¸¦ Á¦°øÇÏ´Â Â÷º°Á¡ÀÌ ÀÖ´Ù. CT´Â ÀÇ·á ºÐ¾ß¿¡¼­ Áß¿äÇÏ°Ô »ç¿ëµÇ¸ç, ƯÈ÷ Á¾¾ç, ¿Ü»ó, ³»ºÎ Àå±â Áúȯ µîÀÇ Áø´Ü¿¡¼­ Å« ¿ªÇÒÀ» ÇÑ´Ù. CT À̹ÌÁö´Â ¼öÇÐÀû ¾Ë°í¸®ÁòÀ» ÅëÇØ º¹ÀâÇÑ µ¥ÀÌÅͷκÎÅÍ °íÇØ»óµµÀÇ ´Ü¸é À̹ÌÁö¸¦ ÃßÃâÇÏ°Ô µÇ¸ç, À̸¦ À§ÇØ ¿©·¯ ´Ü°èÀÇ °è»ê °úÁ¤ÀÌ ÇÊ¿äÇÏ´Ù. CT ½ºÄ³³Ê´Â ÀϹÝÀûÀ¸·Î ¿øÁÖÇüÀ¸·Î ¹è¿­µÈ ¿©·¯ °³ÀÇ X-¼± Æ©ºê¿Í °ËÃâ±â¸¦ »ç¿ëÇÏ¿© ÀÛµ¿ÇÑ´Ù. ÀÌ Àåºñ´Â ȯÀÚ°¡ ½ºÄµµÇ´Â µ¿¾È X-¼± Æ©ºê°¡ ȸÀüÇÏ¸ç ´Ù¾çÇÑ °¢µµ¿¡¼­ ½Åü ³»ºÎ¸¦ ºñÃá´Ù. °¢ X-¼±Àº Á¶Á÷À» Åë°úÇÏ´Â °úÁ¤¿¡¼­ Èí¼öµÇ°Å³ª ±¼ÀýµÇ¾î ¹ß»ýÇÑ ½ÅÈ£¸¦ ÅëÇØ ÇØ´ç Á¶Á÷ÀÇ ¹Ðµµ Â÷À̸¦ ¹Ý¿µÇÏ´Â µ¥ÀÌÅ͸¦ »ý¼ºÇÑ´Ù. ÀÌ Á¤º¸¸¦ ó¸®ÇÏ¿© CT´Â À̹ÌÁö·Î º¯È¯µÇ¸ç, ÀÌ·¯ÇÑ °úÁ¤¿¡¼­ Áß¿äÇÑ ¿ªÇÒÀ» ÇÏ´Â °ÍÀÌ ¹Ù·Î ÇÊÅ͸µ ±â¹ýÀÌ´Ù. CT¿¡¼­ ÇÊÅÍÀÇ ÁÖ¿äÇÑ ¿ªÇÒÀº µ¥ÀÌÅÍÀÇ Ç°ÁúÀ» °³¼±ÇÏ´Â ¡¦(»ý·«)



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Date : 2025-07-23
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