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

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<* i-+ Tn *+b mfg= tb_ -+Hdb =,= jfo= l• >a mfg= *+A= +H~- 0<* =,=+ *Am<- jŽ- %+…- 0d0& +z- =+H *Hc* *pN- i-+ %+q *+b<= MIC *„- B›- *+Hc*

jU MI *+s- Tn {Ÿ *+b?* =‡_ m…b *+b -+f- 0<* =,=+ l• >a i-+ %+• jHc- m^ >I

*p„ i-+ MoH 0<* +˜- Tn {& oH $ >I 0<* M‰- -+¨ *pN- i-+ Tn) T_b {+H l• >a)-^ *p` *+I-+ $ {& H, *pU *pb- jh-+ =‡_ M‰- jN- =D-+ >I {& Hi T• $¬ &+H m^ m< *fS- %+i- *G-+ *+‹C =s- *+k= Z & ] *pC- *pfƒ- +g% -IJ >I

=/ Z2od < ! k B , ' p+% 'D 1 + B 3 , ;

Trang 17

cb { >I 0<* Tn W0 *+h m< *fS- %+i- T• Hi0

h M?J MoH =,=+ l• >a i-+ -IJ *+h m< *fS- %+i- %+q *+b<= MIC H, *pU {& !Cm^ *pC- i-+ Tn) *_ =^ *+• *+_J m•H m< *fS- %+i- 0<* =,=+ Br BI-.&

pC- i-+ Tn) m• mC m< *fS- %+i- *_ B‰- *† Tn *fS- %+i- *pN- -+HrbZ=C-*p_T* *C -CHT‹ p_*HC]&

pC- m^ ° >I -+Hrb

_ *+eJ pŽ- {+s- %+q *+b<= MIC {& !C *_ =^ *+• *+A= +H~- =,= %+ %+?b l• >a mnH MoH i-+ Tn) BC m^ 0s *i {+i -/- *fS- %+i- *n* +S- TCMoH m< *fS- %+i- =‡_ =+G-+ ji- *+W- i-+ m^&

& &— H•- *+U m< *fS- %+i- *pC- i-+ Tn

…b +c* -+z- *+b<= *G-+ =‡_ i-+ Tn =^ *+• mfg= *+_J m•H Br BI-.&

Trang 18

< T,- MI *+_- l,0 =‡_ 0<* i-+ mfg= 0s *i tb_ +HT*C.p_0

<* *pC- -+z- >gH mH•0 >o- -+e* =‡_ i-+ Tn m^ >I =^ *+• +H•- *+U MoH -+Hdbm< *fS- %+i- {+,= -+_b *pN- =‰- 0<* i-+ n=& h-+ &\ >I +h-+ =+q% -.A=mfg= +H•- *+U MoH ±>CC{ @b% *_j>‹² {+,= -+_b mfg= jH•b *+U jŽ- +_H mfƒ-

$ MI *fS- k- *pN- +h-+ &Q

<* i-+ jH* =^ H, *pU *+_- l,0 -Ž0 *pC- {+Ci- *„ mc- [ P— -+f-

*pN- *+A= *c -^ T• {+s- mfg= +H•- *+U +c*& G Bq -+f *pN- +h-+ &Q) H, *pU

*+_- l,0 BfoH —— {+s- =^& < Bn= =‡_ ±>CC{ b% *_j>‹ =^ >HN- tb_-

mc-TA +H•- *+U m< *fS- %+i- =‡_ 0<* i-+ MI =^ mc-TA *fS- mF- .Hz_ >CC{ b%

*_j>‹ MI mfƒ- =C- mœ= *pf- =‡_ m…b *+b *pC- MH~= +H•- *+U i-+& <* i-+

Tn mdb jU i-+ +f`- j`H +_H mfƒ- =C- m^&

6?g e fMhL VGbG ijkYlPIFGlLm

<* i-+ +_H =+Hdb *pN- *+A= *c =^ j_ =+H•b m^ >I =+Hdb =_C) =+Hdb p<- MI m<l,0& +Hdb =_C MI =+Hdb p<- >I {+s- .H_-) =^ mS- MU >I 00& < %+W- HiH{+s- .H_- >I 0<* *+b<= *G-+ 0s *i {+i -/- =‡_ 0<* +~ *+n- i-+ 0HNb *i0<* =,=+ =+G-+ l,= =,= M?* *pC- {+s- .H_- +_H =+Hdb =‡_ i-+& < %+W- HiH{+s- .H_- msH {+H mfg= -+”= mc- 0<* =,=+ mS- Hi- >I m< %+W- HiH& <*

Trang 19

-cb *_ M‚- =›- jH~* mfg= =,= M?* *pC- i-+ *+h *_ -^H i-+ =^ m< HiH =_C& DH 0<* MIH mH•0) +_H M?* *p` -N- tb, …- -+_b mc- m< =+E- lbe*+H~- -+f 0<* *+h *DH mH•0 m^ *_ -^H i-+ 0e* m< %+W- Hi- {+s- .H_-&

%+W-& %+W-& Hd- {+s- .H_-)+I0 %+W- jn mH•0

Hd- {+s- .H_- mS- Hi- l‹0 -+f 0<* {+s- .H_- +_H =+Hdb) =+Hdb p<- l

MI =+Hdb BIH J& <* =,=+ m• mC m< %+W- HiH =‡_ +~ *+n- m…b *+b ZB‹*‹=*Cp]

*pC- 0Hd- {+s- .H_- >I {G=+ 0<* mH•0 *G- +H~b mS- >¢ mc- m…b *+b MI T,* l‹0 -^ m,% k- -+f *+c -IC& x-+ TH-+ p_ *„ 0<* mH•0 {G=+ *+G=+ mc-B‹*‹=*Cp LH >I +I0 m,% k- mH•0 Z%CH-* p‹T%C-T‹ •b-=*HC-] +Cœ= +I0 %+W-

tb_-jn mH•0 Z%CH-* T%p‹_B •b-=*HC-]& G Bq -+f *_ {+C_- 0<* =,H >š -+¨ *pN- *e0

=+h T_b m^ =+Hcb =+‰0 *H_ 5 +³% mH tb_ MI *+b -+?- i-+& oH i-+ J +L= +D*-+W- *_ =^ *+• B‰- 0<* -.bF- mH•0 =^ *G-+ %+^- lD& oH =,= *+Hc* jU *DCi-+ =”* >o%) +I0 %+W- jn mH•0 mfg= *DC p_ jŽ- =,=+ mœ* 0<* mfƒ- *+˜-.tb_ 0œ* %+˜- =‡_ >,* =”* ZT>H=‹ %>_-‹]& pC- ) *_ B‰- 0<* BWJ {H0 >CDH0¨-.) *pC- *_ B‰- 0<* >š -+¨ =+k_ m…J -fo=) *pC- THNb W0 *_ B‰-.TgH =S ji- Z0C-C•H>_0‹-*]&

h-+ $ 0s *i i-+ *DC j`H *„ 0<* mH•0 Z>š -+¨]& h-+ >I +I0 Œ m˜-.+fo- =+C *+eJ 0< +~ *+n- jU 0` Zj>bp]) *+fƒ- B‰- m• 0s *i =+C +~

*+n- *DC i-+ jŽ- %+H0& h-+ >I +I0 Œ je* m˜- +fo-.) *+fƒ- mœ=

*pf- =+C =,= +~ *+n- 5 tb_- +b¦-+ tb_- +Cœ= i-+ =”* >o%& h-+ ! >I

=/ Z2sd &3 + F<t

Trang 20

i-+ *DC j`H 0<* TgH BWJ 0i-+ MI +h-+ ’ >I +I0 Œ *fS- k-.) *+fƒ- mœ=

*pf- =+C i-+ ) ) THNb W0&

cb Œ Hn- -+_b {+H mC *DH =,= M‰- {+,= -+_b *+h *_ -^H +~ *+n- i-+m^ >I *€-+ ZT*_*HC-_pJ]& cb Œ *+_J m•H {+H mC *DH =,= MU *pG {+,= -+_b) *_-^H +~ *+n- m…b *+b m^ {+s- *€-+ Z-C-T*_*HC-_pJ]&

h-+ $ =+C *+eJ +I0 Œ Hn- -+_b *DH -+z- M‰- {+,= -+_b Z+~ *+n-

*€-+]& h-+ =+C 0s *i =+C +~ *+n- {+s- *€-+ {+H =,= +I0 Œ {+,= -+_b

*DH =,= MU *pG {+,= -+_b *pN- =‰- 0<* m…b *+b i-+&

h-+ $ *DC j`H j_ M›- *p›- =^ m< *fS- %+i- {+,= -+_b)0s *i *G-+ m˜-.+fo- =‡_ m…b *+b i-+& x-+ +h-+ jU 0ƒ BC i-+ +f`- j`H TA {+s- +CI-+iC =‡_ m…b *+b i-+& x-+ m…b MIC *+h p¥ - * -+f- BC +~ *+n- *DC i-+

{+s- *n* -N- >I0 =+C i-+ jU 0ƒ Zj>bp]&

Œ 0s *i *G-+ 0ƒ =‡_ 0<* +~ *+n- *DC i-+& cb *_ mf_ MIC m…b *+b 0<*mH•0 {G=+ *+G=+ *_ T• =^ -._J 0<* Œ& +f- BC m…b *+b =^ -+Hdb mH•0{+,= -+_b) 0šH mH•0 =+C 0<* Œ {+,= -+_b -N- i-+ *DC j`H -^ T• jU 0ƒ TCMoH i-+ n=&

& & x-+ 0ƒ Zj>bp]

=/ Z2Zud H ; 3 + F<t

=/ Z2ZZd H ; ; 'a

Trang 21

^ -+Hdb =S =+c {+,= -+_b WJ 0ƒ i-+& < %+W- HiH {+s- .H_- =‡_ 0<* +~

*+n- *DC i-+ jŽ- =,= *+Hc* jU tb_- +L= =^ *+• jU Hi0 mH {+H *_ +<H *q p_-.CIH *HNb mH•0 i-+& +H *H_ 5 m?% MIC 0I- */- T,-.) -^ T• TH-+ p_ ,-+ T,-.{+i {Hc-& cb 0I- */- T,- =‡_ *_ =I- BIJ *+h {+i -/- {+bJc=+ *,- ,-+T,- =I- =_C >I0 =+C i-+ jU -+›‹ -+Hdb +S- TC MoH 0I- */- T,- 0¨-.&

A BU=+ =+bJ•- =¡- >I 0<* -.bJN- -+W- WJ 0ƒ i-+ *pC- *e* =i =,= *+Hc*jU& Hdb -IJ liJ p_ {+H j~-+ -+W- BU=+ =+bJ•- *pC- Tbn* tb, *ph-+ *+b -+?-i-+& pC- 0<* Tn *pfƒ- +g% *+b -+?- i-+ M‰- *H0)+Cœ= BC j~-+ -+W- *+`

=¡- .WJ 0ƒ i-+& CIH p_) *+Hc* jU *DC i-+ jU BU=+ =+bJ•- =¡- .WJ 0ƒ i-+&

!C m^ =,=+ *n* -+e* m• Hi0 i-+ 0ƒ *pC- *pfƒ- +g% -IJ >I HI0 *+ƒH

.H_-*+b -+?- i-+&

pC- =,= i-+ =”* >o% -+f ) jd BIJ >,* =”* =¡- i-+ +f`- mc- m<

%+W- HiH {+s- .H_-& eb *pE= HiH %+}b {+s- %+iH >E= -IC =¡- *+˜- .^=MoH 0œ* %+˜- =”* BC m^ >I0 =+C mfƒ- jHN- =‡_ >,* =”* T• jU 0ƒ {+H >,* =”*

=I- BIJ&

=/ Z2Zgd H+ E 3 + p+% v b! +

Trang 22

& &– +^- mDH i-+

A %+^- mDH >N- tb_- mc- m< +<H *q =‡_ =+‰0 *H_ 5 T• >I0 Hi0 m< HiH {+s- .H_- =‡_ 0<* i-+& +H m< %+^- mDH =I- */- *+h m< %+W- HiH{+s- .H_- =‡_ i-+ =I- .Hi0& `H Mh *H_ 5 >I *H_ %+W- {h -N- {G=+ *+fo= =‡_M?* T• */- {+H *DC i-+&

%+W-=/ Z2Zjd h i , ' p+% *3

Trang 23

`H Mh *H_ 5 >I %+W- {h -N- *_ >bs- =^ +~ Tn %+^- mDH >o- +S- +Cœ= jŽ- &pC- =+q% i-+ jŽ- *H_ 5) msH {+H *_ =…- %+iH mC {G=+ *+fo= =‡_ M?* MG Bq-+f mC 0D=+ 0,b *_ %+iH jHc* mfg= +~ Tn {+bJc=+ mDH m• %+ % mC =+G-+ l,=&

~ Tn {+bJc=+ mDH mfg= *G-+ jŽ- =s- *+k=

Z &\]

oH $ >I {+Ci- =,=+ *„ j^- %+,* *H_ 5 mc- M?*

>I {+Ci- =,=+ *„ M?* mc- m…b *+b i-+

< >o- =‡_ mH•0 +<H *q *H_ 5 Z•C=_> T%C*] >o- T• WJ i-+ =I- 0ƒ& bJ -cb mH•0 +<H *q -+¨ *+h =^ *+• >I0 =iH *+H~- m< %+W- HiH {+s- .H_-& bJ-+HN-) *pC- 0<* Tn *pfƒ- +g% *_ =+e% -+?- i-+ 0ƒ +S- m• mD* mfg= m<

-+HN-%+W- HiH {+s- .H_- *n* +S-& G Bq -+f *pC- =+q% -+¡ i-+ 0_0C.p_%+J *_B‰- *H_ 5 MoH mH•0 +<H *q =• & 00 m• */- m< %+W- HiH {+s- .H_- =+Ci-+&

pN- *+A= *c) 0q= mG=+ =+G-+ =‡_ MH~= %+^- mDH i-+ *pC- 5 tb_- =+† m•Mfg* tb_ HoH +D- m< %+W- HiH {+s- .H_- =‡_ m…b *+b i-+&

=/ Z2Znd h i , c B k 7 B ! 1 ;

Trang 24

& &[ ,= +I0 %+W- jn {+,=

I0 %+W- jn mH•0 Œ 0s *i m,% k- =‡_ 0<* +~ *+n- i-+ mnH MoH 0<*mH•0 {G=+ *+G=+ MI -^ 0s *i +CI- *CI- *G-+ =+e* =‡_ m< %+W- HiH {+s- .H_-&

bJ -+HN- mnH MoH 0<* MIH +~ *+n- i-+ -+f +~ *+n- *DC i-+ B‰- %+H0 *+hMH~= mC Œ pe* {+^ {+/-& +H m^ +I0 %+W- jn {+,= *p` -N- +z Bq- +S-&I0 %+W- jn mfƒ- *+˜- Œ Z>H-‹ T%p‹_B •b-=*HC-] 0s *i m,% k- =‡_ 0<+~ *+n- i-+ mnH MoH 0<* {G=+ *+G=+ *bJc- *G-+& • l,= mU-+ Œ *_ =+Hcb *H_

5 tb_ 0<* {+‹ +³% MI *+b -+?- i-+ ` 0<* ^= P m<& Œ =^ *+• l‹0 -+f-+Hdb Œ =<- >DH MI *pN- *+A= *c mWJ >I TA {c* +g% =‡_ -+Hdb %+ % mC Œ&

Œ Br BI- m• *+b -+?- +S- Mh *_ =+† =…- T”% lc% 0<* =+Hdb) *pC- {+H Œ

=…- %+iH *+˜- =i +_H =+Hdb&

Œ 0s *i m< %+W- HiH {+s- .H_- =‡_ i-+ *pC- *pfƒ- +g% =+Hcb *+˜- ^=& Œ 0s *i m< %+W- HiH {+s- .H_- =‡_ I-+ {+H =+Hcb lHN- ^=& CIHp_ +I0 %+W- jn mfƒ- jHN- ’ Œ Z‹B.‹ T%p‹_B •b-=*HC-] B‰- m• mC -+z-.i-+ +f`- {+,= -+_b =‡_ 0<* +~ *+n- i-+ %+q *+b<= MIC BH~- *G=+ =+Hcb&

& &— Hd- *…- Tn

Œ MI -+z- +I0 %+W- jn {+,= 0s *i -+z- *G-+ =+e* =‡_ m< %+W- HiH =‡_0<* +~ *+n- i-+ *pN- 0Hd- {+s- .H_-& <* =,=+ {+,= m• 0s *i m< %+W-

=/ Z2Zod &3 + ! 1 ' 3

Trang 25

.HiH =‡_ 0<* +~ *+n- i-+ m^ >I mC *pN- 0Hd- *…- Tn& Hd- *+ƒH H_- -IJ =¡- Hn- -+f *pC- T^- W0&

^- +h-+ TH- =^ *…- Tn *G-+ jŽ- M›-.O00 Z=J=>‹O00]) T^- Mbs- =^ =+b{h *G-+ jŽ- >%O00 Z>H-‹ %_HpO00]& I >%O00 =¡- =+G-+ >I mS- MU mC m<

>I >%O00& …- Tn {+s- .H_- *+e%) m,% k- MoH M?* -+¨ *pN- 0<* i-+ MI

*…- Tn {+s- .H_- =_C m,% k- MoH M?* >o- +S-& cb *_ jHc* {G=+ *+fo= =‡_M?* >I ´ *+h *_ =^ *+• *G-+ mfg= *…- Tn {+s- .H_- MI -.fg= >DH&

=/ Z2Zqd < / + 5

Trang 26

& &R I0 mHdb jHc- *pbJd- tb_

pN- +h-+ >I =,= T^- TH- =^ jHN- m< jŽ- -+_b -+f- *e- Tn {+s- {+,= -+_b& HN- m< T^- TH- >I H, *pU mC m< *fS- %+i- =‡_ 0<* i-+ =›- *…-

.H_-Tn mC m< %+W- HiH =‡_ i-+& ,= T^- TH- =^ m< *fS- %+i- m…b MIC Hn-.-+_b -+f- m< *fS- %+i- -.¥ p_ =^ TA *+_J m•H Mh jU 0ƒ j`H +I0 %+W- jnmH•0& ¥ p_ =^ m< *fS- %+i- *+e% *+h m< %+W- HiH =_C MI -.fg= >DH& 5 *

Md ji- =+e* *+h +I0 mHdb jHc- >I0 =+C *G- +H~b -.¥ p_ *p` -N- +IH +›_ +S- *„

*G- +H~b -.¥ MIC&

=/ Z2Zrd &3 ' ( B

Trang 27

I0 mHdb jHc- *pbJd- tb_ Œ 0s *i m< %+W- HiH =‡_ 0<* +~ *+n-.

i-+& Œ 0s *i *† >~ %+…- *p/0 m< *fS- %+i- =‡_ 0<* M?* MI =¡- >I +I0{G=+ *+fo= =‡_ M?*& pC- m_ Tn =,= +~ *+n- i-+) *G- +H~b +h-+ i-+ -.¥ MICmfg= *+s- tb_ -+Hdb jfo= l• >a {+,= -+_b =+G-+ >I tb_ -+Hdb Œ {+,=-+_b& Œ *•- =‡_ +~ *+n- *DH je* {h 0<* *…- Tn -IC >I Ti- %+}0 =‡_ =,=

Œ *+I-+ %+…-&

=/ Z2Zsd =+ ' 7 %

Trang 30

6?n MGoI iLlGYkm

+Hrb >I -+z- *G- +H~b 0I *_ {+s- 0C- 0bn- =+E- lbe* +H~- *pN-

-d-*G- +H~b& +Hrb *pN- 0<* i-+ T• >I0 =+C i-+ m^ jU 0ƒ mH MI >I0 0e* m<

*fS- %+i-&

&–& +Hrb >fg- *•

+Hrb >fg- *• Ztb_-*b0 -CHT‹] >I -+Hrb 0I *_ =^ *+• mc0 +Cœ= mC mfg=&pC- i-+ J TH-+) >fg- *• =^ *G-+ pƒH pD= MI Hn- MoH *G- +H~b -+f *H_ 5)mH~- *•) HC- MI %+C*C- ,-+ T,-.& oH +~ *+n- *DC i-+ j`H *H_ 5 T• Bq-.B‹*‹=*Cp =^ Tn %Hl‹> >I +h-+ Mbs-.) -cb Tn >fg- *H_ 5 *pb- jh-+ mfg= +H-+?- *DH 0šH %Hl‹> =‡_ B‹*‹=*Cp >I *+h -+Hrb *pN- %Hl‹> T• >I

Z & ]Cœ=

Z & ]pC- m^ µ LH >I m< >~=+ =+b}- +Cœ= -+Hrb& µ LH >I %+fS- T_H& +Hrb {+Hmfg= tb_- T,* jŽ- 0”* *pC- 0<* i-+ >I -+Hrb *fS- mnH Zp‹>_*HM‹ -CHT‹]+Cœ= +~ Tn %+fS- T_H Z=C‹••H=H‹-* C• M_pH_*HC-]

Z & ]

† Tn *G- +H~b *pN- -+Hrb ZTH.-_> *C -CHT‹ p_*HC] mfg= =+bJ•- m•H *„-+Hrb *fS- mnH

Z & –]

=/ Z2gjd &3 T B J 3

Trang 31

pC- tb, *ph-+ *+b -+?- i-+) {+H */- *+h m< *fS- %+i- T• */- -+f-.mF- *+ƒH -+Hrb =¡- */- *+‹C Z-+f- */- =+?0 +S-]) -+Hrb *fS- mnH.Hi0&

+H */- *+h =¡- */- MI >Hdb j~-+ -+W- =¡- */-.& cb */- .e%msH MoH =‰- 0k= -/- >fg- Z=‰- { ] *+h >Hdb j~-+ -+W- =¡- */- .e%msH&

+H -+”= mc- =+e* >fg- +h-+ i-+ *+h *_ -+”= mc- & +H */- .e% msH

*+h =+† */- =/- j?= & bn- */- .e% msH) *_ %+iH */- >Hdb e% [

>…-&

pC- i-+ J TH-+) m• Hi0 >Hdb jk= lD =+C j~-+ -+W- mc- 0k= *+e% -+e* 0IM‚- Hz mfg= =+e* >fg- i-+ *+h *_ %+iH */- +~ Tn +e% *+q *H_ 5 =‡_ B‹*‹=*Cp&H~b Tbe* *+b -+?- >fg- *• #!’ Ztb_-*b0 B‹*‹=*HC- ‹••H=H‹-=J] >I *† Tn.Hz_ %+C*C- mfg= *+b -+?- j`H B‹*‹=*Cp MI %+C*C- *oH&

=‰- mfg= *+b -+?- j`H ! =_0‹p_& !C *piH tb_ -+Hdb jHc- m•H *pb- .H_-)0šH %+ % jHc- m•H =^ 0<* -.bF- -+Hrb pHN- BC m^ i-+ =bnH =‰- *+b -+?-

*„ =_0‹p_ j_C F0 -+Hdb -.bF- -+Hrb {+,= -+_b&

Trang 32

&–&– < %+W- HiH *fS-

%+i-+H *+b -+?- i-+ MoH m< *fS- %+i- *+e% *+h 0<* =Wb +¨H mœ* p_ >I =^ j_C-+HNb -+Hrb =^ *pN- i-+ m^& +H 0k= -+Hrb Hi0) m< *fS- %+i- =‡_ i-+ *p`-N- +IH +›_ +S-) mWJ LH >I *G-+ =+e* =‡_ m< *fS- %+i- %+W- HiH& < *fS-

%+i- %+W- HiH =^ 0nH tb_- +~ MoH *† Tn *G- +H~b *pN- -+Hrb& ,= -+I {+C_+L= >I0 MH~= MoH *HMH =+C pŽ-.) *† Tn *G- +H~b *pN- -+Hrb -N- ¬ —&

&–&[ +Hrb *…- Tn •Z•]

cb i-+ mfg= *+b -+?- 0I {+s- =^ je* {h M?* h *pN- mfƒ- mH =‡_ =+‰0

*H_) {+H mC m< *fS- %+i- T• *+e% -+e* MI +…b +c* i-+ l,0 mF- -+e*& +f-

*+A= *c) m< l,0 {+s- mF- -+e* 0<* =,=+ =+G-+ l,= 0I =^ lbe* +H~- =‡_-+Hrb& CDH i-+ -IJ Bb- m• *G-+ -+Hrb MI m< >~=+ =+b}- mfg= *G-+ j`H =s-

*+k=

=/ Z2gmd H ; 3 / ) ; 'i '$ E 3

=/ Z2gnd H ; <IW ; p$ ( ` Z ;

Trang 33

Z & R]

nH MoH 0”* -.fƒH) -+Hrb *+fƒ- lbe* +H~- 0<* =,=+ -.‚b -+HN-& bJ -+HN-)

=+E- *+fƒ- tb_- +~ MoH -+Hrb *„ 0<* mH•0 MI -+Hrb *„ -+Hdb mH•0 {+,=

*pN- 0<* i-+ MI 0nH tb_- +~ m^ =^ *+• mfg= HiH tbJc* jŽ- =,=+ %+W- *G=+-+Hrb *pN- 0Hd- *…- Tn&

Trang 34

Hc- m•H ŒCbpH‹p =‡_ 0<* i-+ *_ T• =^ i-+ *pC- 0Hd- *…- Tn& pN- +h-+ M•)-+Hrb =s- Tbe* Z•] >I -+Hrb jHc- *+HN- =‡_ 0<* i-+&

6?5 GNI YI_F FMI LMQL PT`LV Fp

H~b Tbe* *+b -+?- >fg- *• !#’ ZB‹*‹=*HM‹ tb_-*b0 ‹••H=H‹-=J] =‡_ 0<* +~

*+n- i-+ pe* +zb G=+ {+H 0s *i +~ *+n- *DC i-+ jŽ- *H_ 5) Bb- *pC-.{+C_ +L= +h-+ i-+) m• 0s *i *† Tn *G- +H~b *pN- -+Hrb& !#’ =^ *+• mU-+ -.+€_

Z & \]

ŒZ•] 0s *i 0< +~ *+n- i-+ l• >a *G- +H~b -+f *+c -IC) Z•] 0s *i +~

*+n- i-+ l• >a -+Hrb -+f *+c -IC& c* +g% >DH *_ =^

Trang 35

6?q *_r OsI FtL MGNI

<* BVJ B‹*‹=*Cp =^ +_H {+Ci- =,=+ tb_- *pL- >I {+Ci- =,=+ Hz_ +_H

%+…- *• B‹*‹=*Cp ZT_0%>H- %H*=+ +Cœ= %Hl‹> %H*=+] MI m< p<- =‡_ B‹*‹=*CpZB‹*‹=*Cp _%‹p*bp‹ ‘HB*+]&

+H 0<* *G- +H~b mH mc- 0<* +~ *+n- B‹*‹=*Cp {Ÿ *+b?* Tn ZMG Bq -+f *H_ 5 mHmc- B‹*‹=*Cp +Cœ= T^- THNb W0 %+i- lD Md m…b B›]) 0šH B‹*‹=*Cp pHN- >• =+†

*+b -+?- *G- +H~b mc- -^& <* +~ *+n- -+Hdb B‹*‹=*Cp +h-+ Mbs-.) -+z-

%+…- *• B‹*‹=*Cp -Ž0 =D-+ -+_b) {+Ci- =,=+ Hz_ +_H %Hl‹> +…b -+f mF-.-+e* MoH MoH m< p<- =‡_ =‡_ B‹*‹=*Cp MI mHdb -IJ WJ p_ TA -+…0 >‚-& _H+H~- *fg- {+,= -+_b liJ p_ {+H T• Bq- +~ *+n- B‹*‹=*Cp Tn +Cœ= %+H0 {Ÿ

=/ Z2gsd KB B S ! $ L

py y + ; 3 ! $ L py y

Trang 36

*+b?* Tn >I *G- +H~b +h-+ i-+ mfg= >eJ 0‚b MI {+Ci- =,=+ 0‚b Hz_ +_HmH•0 =+G-+ Hz_ =‡_ +_H B‹*‹=*Cp&

+Ci- {+s- .H_- Hz_ -+z- 0‚b *pN- 0<* i-+ Tn l,= mU-+ *…- Tn =_C-+e* =^ *+• mfg= *DC i-+& HoH +D- -IJ LH >I HoH +D- JtbHT*& cb {+Ci-.{+s- .Hz_ =,= 0‚b Z{+Ci- =,=+ Hz_ =,= %+…- *• B‹*‹=*Cp] >I ´ *+h *…- TnJtbHT* mfg= *G-+ jŽ- =s- *+k=

Z & ]

cb *+I-+ %+…- *…- Tn =‡_ *G- +H~b -Ž0 -.CIH {+Ci- JtbHT* *+h *G- +H~b *,H

*DC >DH T• jU 0e* 0,* TC MoH *G- +H~b j_- m…b){+H m^ *_ LH >I _>H_T

Trang 37

Œ =‡_ 0<* +~ *+n- i-+ >I jHc- m•H ŒCbpH‹p =‡_ Œ

Z & ]

6?3 TuLV ElLV FTULV fMbL ]e EMG FG^F

pC- 0<* +~ *+n- i-+) m< %+W- HiH {+s- .H_- mfg= 0s *i *n* -+e* j`H+I0 mHdb jHc- *pbJd- tb_ Œ& < *fS- %+i- %+W- Hi mfg= 0s *i *n* -+e*

=/ Z2jZd \ D'/ *b% ( py y

=/ Z2jgd =+ H t' 7 w t

Trang 38

j`H *† Tn *G- +H~b *pN- -+Hrb +Cœ= j`H %+• -+Hrb =s- Tbe* Z-CHT‹

%C‘‹p T%‹=*pb0]& H~b Tbe* *+b -+?- >fg- *• !#’ >I =,=+ *n* -+e* m• {c*+g% m< %+W- HiH {+s- .H_- MI m< %+W- HiH *fS- %+i-) mfg= *+• +H~- tb_mfƒ- =C- *fS- %+i- m< =+H *Hc* Z=C-*p_T* B‹*_H> =bpM‹]&

pN- +h-+ >I 0<* mfƒ- =C- mH•- +h-+ {+H *+b -+?- i-+ *„ 0<* !

%+_-*C0& pq= l >I {G=+ *+fo= =‡_ M?*) M?* =I- -+¨ T• -Ž0 Md %+G_ *p,H&pq= J >I m< *fS- %+i- =‡_ M?*) m< *fS- %+i- =I- *+e% {+H =I- *Hc- Md.…- n= *L_ m<& +H 0<* M?* =I- -+¨ MI m< *fS- %+i- *+e% *+h =I- {+^

*+eJ Z-Ž0 ` %+G_ %+…- $ *pN- +h-+ M•]&

~ *+n- $ =^ m< %+W- HiH {+s- .H_- *n* +S- MI =^ m< *fS- %+i- *n*+S- & fƒ- =C- -IJ mfg= T• Bq- %+• jHc- *pC- i-+ -+f- *pC-.0<* Tn *pfƒ- +g%) -^ =¡- mfg= B‰- =+C 0<* Tn *+Hc* jU {+,= -+f 5tb_- {Ÿ *+b?* Tn) THNb W0) =<- +f`- *„ +D* -+W-&

g?6 "U PT`E Jz vwE xy c6{ qd

RT 5) >I TA *pbJd- -/- >fg- =‡_ =,= +D* %+W- *• j_J MoH *n= m< =_C +Cœ=T^- mH~- *„) j_C F0 ,-+ T,- {+i {Hc-) T^- Ms *bJc-) T^- MHj_) *H_ =A=

*G0&

h-+ &–– fƒ- =C- *fS-.

%+i- =+H *Hc* mH•- +h-+

Trang 39

RT 5) 3 >I jk= lD {+s- m‡ -/- >fg- m• jk= =,= ‹>‹=*pC- p_{+¨H tbŸ mDC =+bJ•- m<- =‡_ -.bJN- *•& G Bq -+f T^- MHj_) ,-+ T,-.{+i {Hc-K

RT 5) 3 >I jk= lD =^ m‡ -/- >f`- m• *pC- tb, *ph-+ *fS- *,= MoH-.bJN- *• =^ *+• >I0 =+C =,= ‹>‹=*pC- jk= p_ {+¨H -.bJN- *• >I0 =+C

-.bJN- *• 0_- mH~- *G=+ +Cœ= jU HC- +C,& G Bq -+f *H_ 5) jk= lD _00_)-S*pC-K

A jk= lD =‡_ -.bJN- *•

+H 0<* ‹>‹=*pC- =‡_ -.bJN- *• jU 0e* *+h 0<* ‹>‹=*pC- ` >o% -.CIH T•-+_-+ =+^- -+iJ MIC *+c =+š& !C ‹>‹=*pC- ` >o% -.CIH =^ -/- >fg- >o-+S- TC MoH >o% *pC- -N- T• =^ -/- >fg- *+„_ %+,* p_ BfoH BD- 0<*

%+C*C-& /- >fg- =‡_ %+C*C- mE- jŽ- +H~b -/- >fg- =‡_ +_H 0k=&+H ‹>‹=*pC- -+iJ *„ 0k= =^ *+c -/- =_C ’ -+iJ MIC 0k= *+e% ’ *+h

%+C*C- %+,* p_ =^ -/- >fg-

A {G=+ *+G=+

’>‹=*pC- =¡- =^ *+• -+iJ *„ 0k= -/- >fg- BfoH >N- 0k= -/- >fg- {+H -+?- mfg= 0<* -/- >fg- mE- jŽ- +H~b -/- >fg- m^ Z=+˜- +D +f +e% *+q 0<* %+C*C-]&

*pN-A HC- +^_ BC jk= lD

’>‹=*pC- =^ *+• jU j?* p_ {+¨H -.bJN- *• {+H +e% *+q 0<* -cb m^ =^ -/- >fg- >o- +S- -/- >fg- >HN- {c* =‡_ ‹>‹=*pC-& +H m^ m<-.-/- =‡_ ‹>‹=*pC- T• jŽ- -/- >fg- =‡_ %+C*C- *p„ mH -/- >fg- >HN- {c*

%+C*C-=‡_ ‹>‹=*pC- ZmU-+ >b?* jiC *CI- -/- >fg-.]

x-+ +f`- =‡_ TA HC- +^_ mc- MI {G=+ *+G=+ mc- =,= %+W- *• TH-+ +L=

pC- =,= *c jIC) =,= %+W- *• +zb =S *+fƒ- *+A= +H~- -+z- =+k= -/-.pHN- jH~*& <* Tn %+W- *• m^- M_H *p› tb_- *pL- *pC- MH~= BbJ *ph TA *F-

*DH =‡_ *c jIC& +H =,= %+W- *• -IJ jU %+, M•) *c jIC =^ *+• jU +‡J +CDH&

=/ g2Zd < ! 3 5) +

p b! 'T 5)

Trang 40

+W- *• =^ *+• jU %+, M• -cb -^ jU 0e* mH 0<* +_J -+Hdb ‹>‹=*pC-& -+W- >I BC ‹>‹=*pC- jU 0<* *H_ jk= lD +e* M/- p_ +Cœ= jU 0<* %+W- *• {+,=+_J 0<* HC- BfS- .HI-+ >eJ& CIH p_ %+W- *• =¡- =^ *+• jU %+, M• -cb -^-+?- *+N0 0<* +_J -+Hdb ‹>‹=*pC-&

.bJN-pC- *c jIC =^ pe* -+Hdb %+W- *• -fo= Z\ Q §]) {+H jU HC- +^_) %+W- *•-fo= =^ *+• jU %+W- >J ZTA %+W- +‡J BC jk= lD]& #b, *ph-+ -IJ =^ *+• >I0TH-+ p_ -+z- .n= *A BC Zp_BH=_>] ·) ·=^ +CD* *G-+ +^_ +L= pe* 0D-+)

=s- %+, =,= %+W- *• TH-+ +L=&

g?g TULV FWE E|\ fMlFlL J}G OXG FjTuLV JQF EM_F

pC- J *c) {+H *H_ 5 mH tb_ 0sH *pfƒ- M?* =+e*) =^ – {+i -/- liJ p_

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