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ÇѱÛÁ¦¸ñ(Korean Title) |
3Â÷¿ø Àڱ⠰ø¸í ¿µ»óÀÇ ¸¶ÄÚºê-±é½º ºÐ·ù |
¿µ¹®Á¦¸ñ(English Title) |
MRF-GRF Classification for Volumetric Magnetic Resonance Images |
ÀúÀÚ(Author) |
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Junchul Chun
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¿ø¹®¼ö·Ïó(Citation) |
VOL 23 NO. 04 PP. 0358 ~ 0371 (1996. 04) |
Çѱ۳»¿ë (Korean Abstract) |
Àڱ⠰ø¸í ¸ÞµðÄ® ¿µ»óÀ¸·ÎºÎÅÍ Á¤»óÀûÀÎ ¼¼Æ÷Á¶Á÷(tissue) ¶Ç´Â ³úÁ¾¾ç(brain tumor)°ú °°Àº ºñÁ¤»óÀûÀÎ ¼¼Æ÷Á¶Á÷ÀÇ °¡½ÃÈ(visualization) ¶Ç´Â ºÐ¼®À» À§Çؼ´Â ´ë»ó ¼¼Æ÷Á¶Á÷ÀÇ ÀûÀýÇÑ ºÐ·ù()¸¦ ÇÊ¿ä·Î ÇÑ´Ù. º» ³í¹®¿¡¼´Â ¸¶ÄÚºê ·»´ýÈÙµå (MRF)¿Í ±é½º ·£´ýÈÙµå (GRF) ¹× ½ºÅäÄɽºÆ½ ¸±·º¼¼À̼ǿ¡ ±â¹ÝÀ»µÐ »õ·Î¿î 3Â÷¿ø ÀÚ±â°ø¸í ¿µ»óÀÇ ºÐ·ù ¹æ¹ýÀ» Á¦½ÃÇÑ´Ù. Åë»óÀûÀ¸·Î µðÁöÅ»¿µ»óÀº Á¤»ç°¢ÇüÀÇ °ÝÀÚ(lattice) ±¸Á¶»ó¿¡ Á¤ÀÇµÈ 2Â÷¿ø ·£´ýÈÙµå·Î °£ÁÖµÇ¾î ¿ÔÀ¸¸ç À̶§ ¿µ»ó ºÐ·ùÀÇ ¿µ¿ª(domain)Àº E^2ÀÌ´Ù. ±×·¯³ª, º¼·ý¿µ»óÀÇ ºÐ·ù´Â 3Â÷¿ø ÀÚ±â°ø¸í¿µ»ó(Volumetric MRI)µ¥ÀÌŸ, Áï E^3¸¦ ±× ºÐ·ù ¿µ¿ªÀ¸·Î ÇÑ´Ù. ´ÙÁß ½ºÆåÆ®·²°ú 3Â÷¿ø Å×ÀÌŸ·Î Çü¼¿Þ ÀÚ±â°ø¸í ¿µ»óÀÇ ºÐ·ù¸¦ À§ÇÏ¿©, º£ÀÌÁö¾È ÀÇ»ç°áÁ¤ ¹æ¹ýÀÌ ¼±Åà µÇ¾úÀ¸¸ç 3Â÷¿ø ¿µ»ó¿¡ MRF-GRF ½ºÅäÄɽºÆ½ ¸ðµ¨À» ±¸ÃàÇÏ¿´´Ù. ¿µ»óÀÇ ºÐ·ù °á°ú´Â MAximum A Posteriori (MAP)¸¦ °®´Â Ŭ·¹½º ¸ÊÀÇ ÇüÅ·ΠǥÇöµÇ¸ç MAP¸¦ ȹµæÇϱâ À§ÇÏ¿© ¸±·º¼¼À̼ǰú ¿¡´Ò¸µ¿¡ ±Ù°ÅÇÑ »õ·Î¿î context-dependent ºÐ·ù¹æ¹ýÀÌ °³¹ß µÇ¾ú´Ù. |
¿µ¹®³»¿ë (English Abstract) |
This paper describes a new three dimensional Magnetic Resonance Image (volumetric image) classification technique which is based on the Markov Random Field (MRF) - Gibbs Random Field (GRF) model together with a stochastic relaxation algorithm. Conventionaly, a digital image is considered as a two-dimensional random field defined over rectangular lattice structure and the domain of image classification is the plane. However, in the volumetric image classification, we use voulumetric images, i.e., three dimensional image data sets.
For the classification of Multi-Echo (multispectral) and multivolume Magnetic Resonance Images (MRI), a Bayesian decision rule is adopted and an MRF-GRF stochastic model is introduced. To obtain the maximu a posterior probability (MAP) classification a new multivariate image context-dependent classification based on relaxation and annealing is developed.
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