Tối ưu hóa một số vấn đề kỹ thuật nhằm giảm liều và nâng cao chất lượng hình ảnh của máy chụp mạch máu

) ) ! " #$ *% # + / % & & ' * ' #8 ( ( - $ * , #' *2 345567 %& ' ' " "9 ) *+,- -/0 ! " # $ # $ & 9: ; 4$ 56 $ ?% @ A BC @ D-+ %+E= $ %& F +G : % $ H-+) -.IJ K*+,- K-/0 K #/ * ' #8 L MI *NH-+ -.IJ O O PQR SH TH-+ +U 5V WJ H-+ I-+ X Y P R +^_ P "9 ZR [[ \] ! " #$ % & ) # ) $ * , ' *% ; + #< / : #/ * ' #8 S T` >a *+bJc* Md =+e* >fg- +h-+ i-+) _- *CI- jk= lD mnH MoH *H_ 5& ,-+ H, >Hdb MI =+e* >fg- +h-+ i-+ *pN- %+_-*C0) md lbe* =,= %+fS- %+,% Hi0 >Hdb& ;% Bq- =,= %+fS- %+,% Hi0 >Hdb mV -Nb *pC- *+A= *Hr- >W0 TI- MI m,-+ H,& : # #/ ! 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" # $ A# B ’ ’ ! $ $ $ $ ! Œ Œ ’ Œ Œ #!’ ! !#’ ’ ! Œ Œ! !$ !’5 ’ ! ! C0%b*‹B C0C.p_%+J _.-‹*H= ‹TC-_-=‹ 0_.H- H-.>‹ +C*C- ’0HTTHC- C0%b*‹B C0C.p_%+J CTH*pC- ’0HTTHC- C0C.p_%+J !H.H*_> bj*p_=*HC- $-.HC.p_%+J $T C‘ $T ‹_TC-_j>J $=+H‹M_j>‹ %*H=_> !‹-TH*J C-*p_T* *C CHT‹ _*HC CH-* %p‹_B Œb-=*HCH-‹ %p‹_B Œb-=*HC’B.‹ %p‹_B Œb-=*HCCBb>_*HC- p_-T•‹p Œb-=*HCH.-_> *C CHT‹ _*HC #b_-*b0 !‹*‹=*HC- ’••H=H‹-=J +_p.‹ Cbj>‹ !‹MH=‹ !‹*‹=*HM‹ #b_-*b0 ’••H=H‹-=J CHT‹ C‘‹p %‹=*pb0 H-‹_p ’••H=H‹-=‹ p_-T•‹p _BH_*HC- !CT‹ ‹T%C-T‹ ‹>_*HC-T+H% ŒH‹>B • H‹‘ Œ>_* !‹*‹=*Cp +C*C!HCB‹ $pp_J !CT‹ ’5%CTbp‹ -B‹l C>b0‹ • -*‹p‹T* ’l%CTbp‹ -B‹l Cbp=‹ 0_.‹ !HT*_-=‹ Cbp=‹ j™‹=* !HT*_-=‹ ! " # $ C DE FGHI JK LMGNO JD PIQL JRL ! "# +H -+”= mc- =,= *+Hc* jU =+}- mC,- +h-+ i-+) *_ *+fƒ- -.+€ mc- =,= *+Hc* jU -+f tb_-.) THNb W0) ) ) ’ ) ’ K pC- m^ G* _H jHc* mc_-.HC.p_%+J 0,J =+q% 0D=+ 0,b MoH =+k= -/- -•H j?* m^ >I =+q% i-+ Tn +^_ l^_ -d- ! $& x-+ _-.HC >I 0N- mc- – i-+O.HWJ Z– •p_0‹OT]& $-.HC.p_%+J >I *+Hc* jU =+bJN- B‰- m• =+q% 0D=+ 0,b& $-.HC.p_%+J {+s- =+† mS- *+b…- B‰- m• =+}- mC,- 0I -^ =›- +š *pg) B‚- mfƒ- =+C j,= T€ *+A= +H~- =,= *+‡ *+b?* -+f mœ* T*‹-* ma -+FH 0,b =S *H0) jS0 *”= 0D=+ 0,b -VC *pC- =,= *pfƒ- +g% *_H jHc0D=+ 0,b -VC) *+bJN- *”= mI =+q% Tn +^_ l^_ -d! $ ZBH.H*_> Tbj*p_=*HC- _-.HC.p_%+J] -N- ` =,= j~-+ MH~- *+fƒ- .LH B›- *+Hc* jU -IJ >I 0,J ! $& ,J =+q% 0D=+ 0,b *+bDH mWJ 0oH j”* m…b mfg= *p_- jU -+Hdb *DH =,= j~-+ MH~-& pfo= mWJ =+† =^ =,= j~-+ MH~- >o- 0oH =^ *+• *p_- jU 0,J =+q% 0D=+ 0,b -+f ` *+I-+ %+n F +G H-+ =^ =,= j~-+ MH~- -+f +n- +e*) H~- H0) DH L= !fg=) +g ‚J) —& ž I I BC mWJ >I {Ÿ *+b?* pe* 0oH MI +H~- mDH) MH~= mHdb *pU =_- *+H~% *n- { -+Hdb =+H %+G) =,= j,= T€ =¡- G* =^ mHdb {H~- *Hc% =?-& bJ -+HN- -/0 *p` >DH mWJ) 0,J =+q% 0D=+ 0,b mV mfg= *p_- jU ` -+Hdb j~-+ MH~- ` *+I-+ %+n MI =,= j~-+ MH~- *bJc- *†-+ -+f +H F- ) +H F- ) H_ U-+) +,-+ ›_) h-+ U-+) +,H bJN-K Hdb -IJ =+C *+eJ *G-+ +H~b tbi MI =…- *+Hc* =‡_ 0,J =+q% 0D=+ 0,b *pC- *+A= *c ` H~* _0 -^H pHN- MI *+c HoH -^H =+b-.& !C 0,J =+q% 0D=+ 0,b *+b -+?- i-+ *+‹C *+ƒH H_- *+A= MI *pC- tb, *ph-+ >I0 =_- *+H~%) j,= T€ %+iH %+,* *H_ >HN- *q= m• B‚- mfƒ- -N- >Hdb *H_ T• pe* =_C TC MoH je* {h *+Hc* jU =+}- mC,- +h-+ i-+ B‰- *H_ {+,=& !C m^ MH~= Hi0 >Hdb mnH MoH 0,J =+q% 0D=+ 0,b >I mHdb 0I *_ =…- tb_- *W0 -+e*& pC- =,= =+}- mC,- +h-+ i-+ T• Bq- jk= lD +D* -+W- *+h MH~= Hi0 >Hdb *bW- *+‹C -.bJN- >a $ $ $ Z$T C‘ $T ‹_TC-_j>J $=+H‹M_j>‹] *bJ -+HNMH~= Hi0 >Hdb T• { C *+‹C MH~= Hi0 =+e* >fg- i-+& bJ -+HN-) *pC- 0N- =,= *+s- Tn i-+ +f`- mc- =+e* >fg- i-+ MI >Hdb j~-+ -+W- m• *pC- tb, *ph-+ =_- *+H~% *_ =^ *+• >A_ =+L- *+G=+ +g% *pC- =,= *pf- +g% =q *+ã Ê \Ô& CIH p_ =›- -+Hdb jIH j,C {+,= -^H Md M…- md -IJ -+f- =,= -.+HN- =kb -IJ +…b +c* mfg= -.+HN- =kb ` =,= -fo= =+Wb ˆb& Hdb -IJ =¡- Br +H•b j`H Mh ` =+Wb ˆb) 0,J =+q% 0D=+ 0,b mV %+,* *pH•- *„ pe* >Wb -N- =^ pe* -+Hdb =,= -.+HN- =kb k- Bq-.& ž H~* _0) BC -.I-+ M?* >a {Ÿ *+b?* J TH-+ 0oH p_ mƒH …- mWJ MI 0,J =+q% 0D=+ 0,b 0oH mfg= tb_- *W0 %+,* *pH•.…- mWJ -N- MH~= -.+HN- =kb k- Bq- -IJ ` H~* _0 =›- pe* +D- =+c& !C m^ md *IH -IJ p_ mƒH m• m,-+ H, =,= %+fS- %+,% Hi0 >Hdb mV mfg= -.+HN=kb *pN- *+c HoH) ,% Bq- ` *+A= *c -fo= *_ -+f *+c -IC m• *„ m^ =^ *+• >A_ =+L- mfg= %+fS- %+,% Hi0 >Hdb *+G=+ +g% Ê R) \Ô& *pfo= mc- H) *_ =+† tb‹- B‰- 0,J =+q% 0D=+ 0,b MoH =,= *+s- Tn mfg= =IH mœ* T©- =‡_ +V- Ti- lbe*& ,= *+s- Tn -IJ %+‰ +g% MoH *HNb =+b}=+Wb ˆb MI *+c HoH -+f- {+s- jHc* p¥ =,= *+s- Tn m^ =^ *+?* TA %+‰ +g% MoH *+A= *c H~* _0 +_J =+f_& I *+ã *pD- -.fH H~* _0 *+h -+ă j +STC MoH *+c HoH BC m^ *_ +CI- *CI- =^ *+• Hi0 >Hdb TC MoH =+b}- =‡_ +V- Tilbe* mf_ p_& Hdb -IJ T• mfg= m,-+ H, {Ÿ *pN- 0_p.‹ =+C i-+ =^ m< %+W- HiH pe* *+e% MI B›- =_C Z & &–]& %O00 { =/ n2Zmd KB ! ; T : ) M +h- MIC mF *+U *_ *+eJ *pC- Tn j_ *H0 *+h *H0 >_.p‹ =^ m< %+W- HiH pe* *+e% MI B›- =_C -+e*& H0 0H=pC =+C i-+ =^ m< %+W- HiH *n* -+e* MI B›- *+e% ! " # $ -+e*& !C m^ 0bn- mD* i-+ =^ m< %+W- HiH =_C) *_ =+L- *H0 =I- -+ă =I- *n*& bJ -+HN-) {+s- %+iH *pC- 0LH *pf- +g% *_ mdb =^ *+• T• Bq- *H0 0H=pC 0I %+iH =^ TA =W- -+”=& pC- -+z- *pfƒ- +g% =_- *+H~% 0D=+ MI-+ ) B›- *pb- jh-+ {+Ci- — \ 0$ *‰J *+ba) 0,J T• *A m> +C= *H0 >_p.‹ *+h T• =+Ub mfg= B›- =_C +S-) */- *b•H *+L =+C j^-.& I *_ %+iH =+e% -+?- 0e* m< %+W- HiH *pC- *pfƒ- +g% -IJ& pC- =_- *+H~% *+- {H-+) BC 0D=+ 0,b -VC pe* -+ă -N- mH +ăH i-+ %+iH =^ m< %+W- HiH =_C) BC m^ *_ %+iH =+L- *H0 0H=pC *pC- *pfƒ- +g% -IJ& ,= j< %+?- *pN- -VC G* BU=+ =+bJ•-) 0D=+ 0,b l‹0 -+f mk- JN- -N- *_ B‰- {Ÿ *+b?* */- =fƒ- i-+ jŽ- %+fS- %+,% l^_ -d- ! $ Z!H.H*_> bj*p_=*HC$-.HC.p_%+J] m• */- m< *fS- %+i- =+C i-+& x-+ =+q% {+s- =i- tb_- =/ n2Znd F x-+ =+q% =^ =i- tb_- ! 3! k! x-+ lC, -d- Z! $] [DH) m• */- m< %+W- HiH =+C i-+ *_ -N- =+L- *H0 =I- -+ă =I- *n* -+f- {+H m^ -cb B›- */- tb, =_C T• 0_b =+^- jU +ă- j^-.& nH MoH =,= M- =- =+q% G* =+bJ•- mbs- m?% -N- *_ {+s- *+• ,% Bq- %+fS- %+,% =+q% l^_ -d- *pC- *pfƒ- +g% -IJ& ! " # $ < *fS- %+i- { *+45- 78 : '/ • *G-+ m< *fS- %+i-) *_ >eJ -d- i-+ >I0 =+b}-) {+H m^ m< *fS- %+i- mfg= *G-+ *+‹C =s- *+k= Z—& ] oH =s- *+k= *pN-) BA_ MIC =,= *+n- {N *+h m< *fS- %+i- -+ă -+e* 0I *_ =›- =^ *+• %+W- jH~* mfg= >I & Ê Ô& !A_ MIC mF *+U *_ *+eJ) m< *fS- %+i=‡_ =,= *H0 …- -+f jŽ- -+_b MI =,= H, *pU =‡_ m< *fS- %+i- mdb >o- +S0k= =+C %+ % {+, -+Hdb& q?n GbO PGzI FjHL F“LV ’j\Ok +G -.+H~0 -IJ T• Bq- *H0 0H=pC m• m,-+ H, =,= 0k= >Hdb =+Hcb {+,= -+_b k- MoH =,= 0k= { {+,= -+_b) *+ƒH H_- =+q% jŽ- -+_b& J { =/ n2Zq d @ T : T M ! " # $ !A_ MIC mF *+U *pN- *_ *+eJ {+H { =I- */- *+h >Hdb +e% *+q =I- .Hi0 -+f- MoH { >o- +S- R *+h >Hdb =+Hcb Hi0 mH m,- {• *pC- =i +_H *pfƒ- +g%& %O00 { *+4; - < # = / !A_ MIC mF *+U *pN- *_ *+eJ {+H *_ */- >Hdb *+h m< %+W- HiH …- -+f {+s- */-.& < *fS- %+i- { *+4> - 78 # / _ *+eJ {+H Hi0 >Hdb *+h m< *fS- %+i- =¡- T• Hi0 -+f- {+s- m,- {•& !C m^ *pC- tb, *ph-+ =_- *+H~% j~-+ -+W- *pN- 0,J =+q% 0D=+ 0,b) *_ +CI*CI- =^ *+• Hi0 >Hdb *„ &[ê JOã lbn- =- &Q ê JOã) *+?0 =+G lbn- *+e% +S- -z_& V- H‹0‹-T mV BA_ MIC *+• *pD- =‡_ -.fƒH =+Wb ˆb) BA_ MIC {H-+ -.+H~0 >I0 MH~= =‡_ =,= -+I jk= lD +L= *pC- >€-+ MA= =+}- mC,- +h-+ i-+ jŽ- *H_ m• mf_ p_ =,= *+s- Tn Md >Hdb =+C 0,J =+q% 0D=+ 0,b& +f- *+ã *pD- -.fH H~* _0 -+ă +S- TC MoH -.fH =+Wb ˆb) BC m^ -cb *_ B‰- =,= *+s- Tn *+‹C mE- MoH =+b}- =‡_ H‹0‹-T *+h =+e* >fg- i-+ mfS- ! " # $ -+HN- T• pe* *n* -+f- *_ +CI- *CI- =^ *+• Hi0 lbn- *+e% +S- 0I =+e* >fg- i-+ M‚- ` 0k= =+e% -+?- mfg=& ,= jH•b mF jN- *pN- mV =+k- 0H-+ mHdb m^ -+f- =+† >I0 *+h -.+H~0 *pN- %+_-*C0 MD=+& N- BfoH >I 0Hdb BA_ *pN- >a *+bJc* mV -Nb mfg= ,% Bq- *DH {+C_ =+}- mC,- +h-+ i-+ =‡_ j~-+ MH~- +g ‚J *pN- \ j~-+ -+W- =_*+H~% _-& Hdb =IH m* =+C { 0,JZê JOã] &[ &Q & R; n2Zd HB + 0$ *pb- *pb- n +h-+ =+q% jh-+ jh-+ *pb- jh-+ \ –—Q \ \ –[ R— RR –P \[ ( * 'D •- >Hdb +e% *+q *pb- jh-+Z0 J] [ R– &[ b JO• >I *+s- Tn >Hdb =+b}- mfg= mf_ p_ j`H +V- H0-T Ê R) \Ô Tã Bq- =+C =,= *pf- +g% =_- *+H~% jq- -^H =+b-.& oH 0k= >Hdb >I &Q b JO•) BC *pC- Tn \ *pfƒ- +g% >I0 *+G -.+H~0) =^ +_H *pfƒ- +g% j~-+ -œ- MI {+^ {+/- -N- Tn +h-+ =+q% *pb- jh-+ */- Mfg* j?= TC MoH *pfƒ- +g% =›- >DH& _ =^ *+• B‰- tbJ *”= *_0 Tbe* m• *G-+ >DH >Hdb +e% *+q *pb- jh-+ -+f ji- jN- BfoH& Hdb =IH mœ* =+C { 0,JZê JOã] &[ &Q & R; n2gd HB + 0$ *pb- *pb- n +h-+ =+q% jh-+ jh-+ *pb- jh-+ \ –—Q \ \ –[ \[ RR –P \[ ( * 'D •- >Hdb +e% *+q *pb- jh-+Z0 J] [ Q _ *+eJ {+H >Hdb =IH mœ* =+C 0,J Hi0 mH [Đ Z &Q ] *+h *ã- >Hdb +e% *+q *pb- jh-+ Hi0 — §& +H >Hdb =IH mœ* Hi0 mH Đ Z & ] *+h *ã- >Hdb +e% *+q *pb- jh-+ Hi0 mH P §& ! " # $ =/ n2gu d h k! : * g2m =/ n2gZ d h k! : * Z2g ! " # $ _ *+eJ i-+ =+q% MoH >Hdb & =^ M¢ 0ƒ +S- TC MoH i-+ =+q% MoH >Hdb &[ -+f- -cb *_ */- -F- m< =+e* =i- tb_- =+C i-+ & >N- *+h i-+ Tã pƠ - * MI m³% +S-& • Bq- %+…- 0d0 0_*>_j m• m,-+ H, =+e* >fg- i-+ ! " !# $! % !$ & ! ! ! n2jd K3 B R; !'( &! ! ! ! ! ; , ; D b% * ; nu‚ * b! k '/ ; su‚ B ! ; ; ju‚2 I ( V + D! ) 'D '3 ƒ c b * ; ; * ( 3% k! ) 2K b% D ; * i *: b * / ; V + D! D i : 2[ + + c %7 '3 'D L pk * Z2g !2 q?5 GbO PGzI v”LV EWEM •MXLV †‰LV PT}G EMZLV FWL xy D ; ; H~= {+s- B‰- >foH =+n- *,- lD >I 0Hdb pe* %+• jHc- mnH MoH =,= *pfƒ- +g% =_- *+H~% -+H MI mV =^ pe* -+Hdb -.+HN- =kb) jIH j,C {+C_ +L= -^H Md Me- md -IJ& oH -+H) MH~= {+s- B‰- >foH =+n- *,- lD *pC- tb, *ph-+ =+}- mC,- MI =_- *+H~% 0D=+ 0,b -+H HE% Hi0 >Hdb >N- mc- P §& pC- >b?- M/- -IJ =¡- T• B‰- %+fS- %+,% Hi0 >Hdb -IJ =+C *pfƒ- +g% -.fƒH >o-& —&[& ,-+ H, >Hdb N- BfoH >I 0Hdb BA_ *pN- >a *+bJc* mV -Nb mfg= ,% Bq- *DH {+C_ =+}- mC,- +h-+ i-+ =‡_ j~-+ MH~- +g ‚J *pN- \ j~-+ -+W- =_*+H~% _- MoH >Hdb =+b}- BC +V- H‹0‹-T mf_ p_ >I &[& ^ >foH { \ 0$ –[\ n +h-+ =+q% *pb- jh-+ RP •- >Hdb +e% *+q *pb- jh-+Z0 J] ! " # $ +s- >foH R; n2md @ RR U –R L pk [ – * : + * : 5) _ =^ *+• B‰- tbJ *”= *_0 Tbe* m• *G-+ >DH >Hdb MoH \ +h-+ =+q% -+f ji- jN- BfoH& ^ >foH +s- >foH R; n2nd @ { \ RR U n +h-+ =+q% *pb- 0$ jh-+ –[\ RP –R \ L pk * : + •- >Hdb +e% *+q *pb- jh-+Z0 J] Q\&— * : 5) _ *+eJ {+H {+s- B‰- >foH =+n- *,- lD *+h >Hdb Hi0 mH QĐ -+f- =+e* >fg- i-+ Tã Hi0 lbn- MI mfg= {+iC T,* jN- BfoH& —&[& =/ ,-+ H, =+e* >fg- i-+ n2gg d h : * g2m * : 5) ! " # $ =/ n2gj d h : * g2m < *fS- %+i^ >foH &QP +s- >foH &–—\ R; n2o d K3 B ! ; * : , 5) ; _ *+eJ m< *fS- %+i- =‡_ i-+ {+s- =^ >foH =+n- *,- lD *+e% +S- -+Hdb TC MoH i-+ =^ >foH =+n- *,- lD Z Hi0 R §]& foH =+n- *,- lD HE% mU-+ +fo- =+‰0 *H_ =+C *+˜- .^=) Tn >fg- *H_ *,- lD %+q *+bfg- =+‰0 *H_ TS =e% MI *pfƒ- =+Hcb ZŒ ]& !C m^ {+H jd BIJ j~-+ -+W- */- *+h *H_ *,- lD =I- -+Hdb) -cb {+s- =^ >foH =+n- *D- lD *+h =+e* >fg- i-+ T• Hi0 mH m,- {•& Hdb -IJ =¡- .HiH *+G=+ *DH T_C *pN- *+c HoH =+† ,% Bq- =,=+ Hi0 >Hdb -IJ mnH MoH j~-+ -+W- -+H >I =+‡ Jcb £ PÔ& ! " # $ B * ' MTULV 31 3?6 ^F PIQL WE •^F [Ib E|\ PIQL JRL H_ >I jk= lD =^ -/- >fg- =_C) =^ {+i -/- .WJ i-+ +f`- >Wb BIH mnH MoH =S *+• -cb *_ =+Ub >Hdb *H_ tb, =_C) BC m^ MH~= Hi0 >Hdb *H_ >I +c* Tk= =…- *+Hc*& bJ -+HN- BC mœ= *+‰ =‡_ *„- j~-+ 0I =^ =,=+ mHdb *pU {+,= -+_b& oH =,= j~-+ -+f -+FH 0,b =S *H0 BC +³% ma 0D=+ 0,b -^H =+b- *+h %+fS- %+,% =+}- mC,- MI mHdb *pU jŽ- 0,J =+q% 0D=+ 0,b >I *HNb =+b}MI- *pC- mHdb *pU& ž H~* _0) BC 0,J =+q% 0D=+ 0,b 0oH mfg= tb_*W0 %+,* *pH•- …- mWJ -N- -+z- -.+HN- =kb k- Bq- Md 0,J =+q% 0D=+ 0,b =›- +D- =+c MI +…b -+f =+f_ =^ md *IH -IC -^H Md 0,J =+q% 0D=+ 0,b) mœ= jH~* >I Md =,=+ Hi0 >Hdb& ,= %+fS- %+,% Hi0 >Hdb -Nb *pN- mdb mV mfg= -.+HN- =kb ` -+Hdb -fo= {+,= -+_b& šH %+fS- %+,% =^ fb mH•0 MI -+fg= mH•0 pHN-.& +fS- %+,% Hi0 >Hdb jŽ- =,=+ {+s- B‰- >foH =+n- *,- lD >I %+fS- %+,% {H-+ mH•-) mfg= -.+HN- =kb pe* -+Hdb tb_ =,= jIH j,C {+C_ +L= MI =¡- mfg= ,% Bq- -+Hdb *pN- *+A= *c) mœ= jH~* >I *pC- =_- *+H~% -+H& bJ -+HN-) mnH MoH =_- *+H~% -.fƒH >o- *+h %+fS- %+,% -IJ =+f_ mD* +H~b tbi =_C Mh jd BIJ =S *+• =I- */- *+h *H_ *,- lD =I- */-.) >I0 =+C i-+ =I- 0ƒ& +fS- %+,% -IJ HE% Hi0 >Hdb -+f- =+e* >fg- i-+ =¡- jU Hi0 -+Hdb) BC m^ %+fS- %+,% -IJ G* mAS= T• Bq- mnH MoH -.fƒH >o-& +fS- %+,% {+,= HE% Hi0 >Hdb >I *+_J m•H =,= *+s- Tn { ) 0$K m• *„ m^ *+_J m•H >Hdb =+Hcb& q *+• *pC- >b?- M/- -IJ) *_ Hi0 >Hdb *pN- *„- i-+) *+n- {N *+A= *c *pN- j~-+ -+W- =+C *+eJ) %+fS- %+,% -IJ Hi0 >Hdb pe* *n* MI =+e* >fg- i-+ Hi0 {+s- m,- {•& Hi0 >Hdb jŽ- %+fS- %+,% {+s- B‰- >foH =+n- *,- lD HE% Hi0 mH —Q§ >Hdb +e% *+q& pC- {+H mC Hi0 >Hdb jŽ- =,=+ Hi0 >Hdb =+Hcb *pN*„- •p_0‹ Z=^ T• Bq- >foH =+n- *,- lD] =^ *+ã Hi0 >Hdb P Đ TC MoH 0k= =+b}- =‡_ H‹0‹-T& I *pC- tb, *ph-+ *Hc- +I-+ *+G -.+H~0 *+h =,= j,= T€ =¡- *+G=+ %+fS- %+,% Hi0 >Hdb *pN- *„- •p_0‹ +S-) =+e* >fg- i-+ =¡- *n* +S-& !C m^ m• Hi0 >Hdb) *n* -+e* *_ -N- B‰- %+fS- %+,% Hi0 >Hdb *pN*„- •p_0‹& ! " # $ 3?g T}LV fMWF FjG–L E|\ ]z FKG C T,-+ >Hdb MI =+e* >fg- i-+ =‡_ 0,J =+q% 0D=+ 0,b T• Bq- j…b */- T,- MI m…b *+b %+˜- Zm…b *+b j,- B‚- Œ>_* !‹*‹=*Cp]& ,-+ H, >Hdb *H_ mnH MoH *„- 0CB‹ =+q%& ,-+ H, >Hdb *H_ {+H *+_J m•H =,= 0k= >L= *H_ Z=,= *e0 >L= *H_ jŽ- mF-.]& ,-+ H, =+e* >fg- i-+ {+H *+_J m•H =,= *+s- Tn +?b l• >a i-+& ,-+ H, >Hdb j~-+ -+W- ` =,= ^= =+q% {+,= -+_b& C T,-+ >Hdb MI =+e* >fg- i-+ {+H =+q% *pN- 0,J =+q% 0D=+ 0,b MI 0,J & ,-+ H, >Hdb *H_ *,- lD {+H >I0 =_- *+H~% *pN- j~-+ -+W-& ,-+ H, *,= Bq- =‡_ *H_ mnH MoH -+z- j~-+ -+W- -+H T_b {+H >I0 =_- *+H~% *pN- 0,J =+q% 0D=+ 0,b& ! " # $ *: ) & º‹ppC>B & bpTj‹p.) º&$-*+C-J ‹Hj‹p*) ‹B2 y y y *! % • yp * H%%H-=C** •H>>H_0T _-B •H>{H-T) & & H=+_‹> & ‹b0_-) R yp * y *% p‹TT ) —& –& •H>>H_0 & ‹-B‹‹) Hyp * ! % $ ºC+- •H>‹J _-B C-T) & [& Cj‹p* >C-T‹J) _p‹- & bBpJ) ‹B& R yp * ) p‹TT) –& —& & _.™_p‹MH= _-B º& & _.‹>) R yp * y yy ) –*+ H-*‹p-_*HC-_> =C-•‹pp‹-=‹ C- jHC0‹BH=_> ‹-.H-‹‹pH-.) 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