Segmentation of 3D Medical Structures using Robust Ray Propagation ...

7 downloads 0 Views 2MB Size Report
Abstract. A robust and efficient method for the segmentation of 3D structures in CT and MR images is presented. The proposed method is based on 3D ray ...
 

    "!#$ &%(')* &')%+ ')+&)-,. /0')+1 2,. 3546%7)   &  8 :=?A@CBEDF=GIHÈÓKMb=[; @C;(@QBÔ}:Õ =B@CVMB0Y=[×d@Zb=‹;Ð}ÚtBKMYWYW@{NP@QV`B1HWNPUW="ÎWLPVb=[;P;>@QBWSa@CBÉM\6;OÎ=[Y)bVM_aÎW:NK§N>@CVMB}KTXbVM_aÎWXC=Û@{Ny?`HUW=É`\ =ÛAN>=[B@CVMB)KTXCSMVMLP@QN>UW_$;[Ð \=ÈÝVMLP_aKMÏWXC=E_aVY=[XC;U=[BdN*Y=ÈÝVMLP_aKMÏWXC=_aVY=X1KMÎWÎWLPV`KMbU=bVM_aÎW:WNPK§NP@QV`BV·NPUW=K`YWY@QN>@CVMBU=N_ =N>UWVYW;ëßQà‹åHOæ@ZKTXC@QыK§N>@CVMBéVMÈfÎ}KTLKT_a=NP=L;o@QBéNPUW=ªb[KM;>=$VTÈf=ÛÎWXC@Cb@{Na;O:WL>ÈÓKMb=$=×`VMXC:N>@CVMB©N>=‹bUÕ BW@CÙd:W=‹;ß{à‹áWH>â§çiÐ ÚtBaN>UW@Z;(Î=‹;O=[BdNƒKTB$=Í·b@Q=[B`N‹HMLPVMÏW:};yN‹H`KTB}Ya:=SM_a=[B`NK§NP@QV`BVTÈ^É`\í_a=‹Y@Cb[KTX;ON>LP:=‹;HÆ=MÐ S_ëÈÝL>V`_îbV`B`NPLPK`;yN =BWU@Æ@CBÈÝVMLP_$K§N>@CVMBVMB·ÏÆVM:WB}YWKTLP? ;O_aVAVTNPUWBW=[;P;[Ð}óW:=‹YÊ×A@ZKÞNPUW=0ÎWLPVMÎ@CVMBÊVMÈLKŽ?;ÈÝL>V`_ûN>UV`ÎUW@QÈñN·KTB@C; KTB_aVAVTN>UՑK`;>b=BdN"_a=[KTB«;OUW@QÈñNaXQVbKMXQ@CÑ=‹;=‹YSM=‹;K`bwÕ b:WLK§NP=XC?ª@CB0N>U=B=Ü^V`L>GA@CBWS VMBE׎KMXQ@ZYWKTNOÕ @QBWSEVM:=[Y#;>=SM_a=[B`NK§NP@QV`B KTXCSMVMLP@QN>UW_$;·b[KTB ÏÆ=ðY@C×A@CYW=[Y#@CBdN>VÊ=ÛÎWXQ@Zb@QN _ =N>UWVYW;EKTB}Yè@Q_aÎWXC@Cb@{NE_a=N>UUWVYW;[H^YW=ÈÝVMLP_$KTÏWXC=;>:WLOÈÓK`b=‹;$KTLP=0L>=[ÎWL>=‹;O=[BdN>=[YÌÏA?êNPL>@ZKTB=No_a=NPUWVYW;Ð =×`=X ;O=N_ =N>UWVYW;ß{àŽåHyæ}H>ìWHPåàMHàŽäAHà‹âŽç1U}KŽ×M=oÏ}=[=B)ÎÆVMÎW:WXZKTL ÏÆ=[b[KT:=oN>U=NPVMÎÆVMXCVMSM@ZbKMXQXC? Ô:WL>ÈÓKMb=^L>=‹Ùd:W@QLP=_a=[B`NÈÝVML ;O@C_:WXZK§NP@QV`Bxiµ&€P€mðrtsM„t¨ñj‡€ ‡z¸[j„yl{j[m`‡€ajmAp ú Š”MŠ & €Po„ nTh"j[m`mj[mAp®*Š ‚&j[€Pu{unlñ( pMl´¼W€P„y€m§xyl{j[u¨Zz[„yh"j¤dun€hzTp`€Pu{rFŠ 2999G:E=IHJˆaK > >LM= K!cEOAM>=#P =aQ0= >SRTC3=IHNmaU>1cV2N>!cJPUP aXWmcE>H=c>. | \– e — fE —[— ¬ $Ž—‹— –M| \ " "OÝ Š p &^Š‚^ŠAq€hsM„ylñŠF~MˆAj…€ hzTp`€ununlnmdkoµ(l´xyˆ ¨Q„yz‹m§x*…M„yz‹…dj[kŽj¹ " Š †ŠA°aj[unu{j‹p`lñ|W”MŠ™ŠA~M€>xyˆdl{j[m³éjmAp©­Š&®Æ€P„yvz[…z‹s`u{z[rŠ ™£pT³`mdj[hln‡a¶Am`l´xy€$€un€h€m§x"rts`„t¨Zj[‡€hzTp`€u(¨Zz„ rt€Pk‹h€m§xOjxylnz[m$j[mdp xt„Oj[=‡ nMlnm`kl{m$h sdu´xyl{p`lnh€m`rtl{z[mAju}h€wpMln‡wj[u}l{h"jk‹€r(µ(l´xyˆ·j[…`…dunln‡wjxylnz‹m$xyz ‡j„Op`l{j‡ — ­#lnh"j[k[€j[mAju´³`rtlnrYŠ  V1bC$cZR,b2N[=7W4aU>\WF= >R^]¹ipMlnh€mdrtlnz‹mdj[uartˆdj[…€Ê„y€…`„y€rt€PmTxOjxylnz‹m ¨C„yz[h ‡Ps`„y¸[jxys`„y€>¹ipM€…€mdp`€m§xpM€P¨Zz„yh"jxylnz‹m`rŠF®&†ƒo¹ \ ú –M| /ƏF°$~W| &F„yzwµ(ma˜*m`l{¸‹€P„yrtl´xi³§1| \ " " ¬MŠ \ ú Š~, Š '*rtˆd€P„ j[mdp)”`ŠÆ™ŠI~M€Pxyˆ`l{j[m}LŠ -`„yz[m§xyr …`„yz‹…dj[k‹jxylnmdkaµ(l´xyˆ)‡sM„y¸‹jxys`„y€pM€…€mdp`€m§xrt…€€wdp ™ƒunk‹z[„yl´xyˆ`hr¤Aj[rt€p z‹Dm +*j[hlnu´xyz‹mM¹i”‹j[‡z[¤dlW¨Zz[„yh sdu{jxylnz[mdrMŠ &bef[ Vbd| Œ " .| \ " –[–MŠ \¬MŠ®*Š &^ŠA~M€¤dj[r‘xyl{j[mS= P  oaUy| ú •‹J• \‹Š \Œ 6 Š +ŠF®Æ € nÞj[mdu p &^Š &^Š b lnhl{jMŠêqz‹uns`h€Pxt„yln‡ rt€k[h€m§xOjxylnz‹méz¨ h€wpMl{‡j[uƒl{h"jk‹€r"¤§³xyˆ`„y€€>¹ pMlnh€mdrtlnz‹mdj[umbz%wBIbz#{ yI|z#xJ}!w~x#IIx,b{| \ "#" \‹Š \ " Š‚^Ч®Æz‹h"jrtlj[mdpo†Ч°aj[mApMsd‡OˆdlñB Š & lnu{jxy€P„Oju¶Au´xy€P„ylnmdk ¨Zz„&k„Ojw³j[mApo‡Pz‹unz[„lnh"jk‹€rŠWg‰Lm 2465w &Fz‹h¤dj³§|TgimApMl{jM|`…Aj[k[€r^–‹¬ "7$ – , ³ \ "#" –MŠ — Ý |”Žj[mTsAj„t$ ú •M0Š &ƒŠTqF€h s`„ylñ|T™Š`° lnxyln‡Oˆd€‹|`jmAp”`Š`™^k‹k‹j„tµ&j[uñŠF‚ s`„y¸[jxysM„y€P¹Ó¤Aj[rt€p„y€P…`„y€rt€m§xOjxyl{z[m z¨Iz‹¤ €‘€P‡Pxyr ¨Q„yz‹h²„Ojmdk‹€p`jxOjT4Š 2N[=7Wmc=>SR‚5.aUoa`>‚ VˆaU>\W[| — p\w• tŒ $ \4\ — | \ " – Ý Š ú \‹Š †tŠ g¥ˆ`l´xO4j nŽ€P„wŠŽ™^unk‹z„yl´xyˆdhr}¨Cz[„lnh…`u{ln‡l´x1pM€P¨Zz„yh"j[¤`u{€hzTp`€Pu{rŠŽgim 2465,Iƒ[|…Ajk‹€rI– ú‹tú $ – ú‹Œ | \ "#"‹ Š ú[ú Š †IŠ g¥ˆ`l´xO4j nŽ€P„w|Ž­!Š &F„y€€mxyˆ}|Mj[mdp“ ŠM~Tz‹mdlñŠI~M€k[h€m§xOjxylnz‹m"z¨Æ¤`l{z[unz‹k‹ln‡wju}¸‹z‹unsdh€ p`jxOjrt€Pxyr(sdrtlnmdkj u{€P¸Ž€uµ&z[o„ n.Š 5#P tc[]8

Suggest Documents