Transcription of 死後 MRI における - ipu.ac.jp
1 MRI short-tau inversion recovery (STIR) 2014 3 1 ..1 ..1 M R I .. 2 s h o r t-t au i nv e r si o n r e c ov e ry S TI R .3 M R I .. 8 .. 1 0 2 .. 11 T1,T2 ..1 2 .1 .. 1 2 .2 ..13 .2 .1 Sy ng o M a pI tTM ..1 3 .2 .2 .. 15 .2 .3 S y n g o M a pI tTM ..16 .2 .4 ..17 .3 ..18 .3 .1 S y n g o M a pI tTM ..18 .3 .2 ..19 .4 ..27 ..30 .1 ..30 .2 ..31 .2 .1 ..34 .3 ..35 .3 .1 T1.
2 35 .3 .2 T2 ..37 .4 ..39 .4 .1 T1 ..39 .4 .2 T2 ..40 ..41 .1 ..41 .2 ..42 .3 ..43 .4 ..44 ST I R ..45 .1 ..45 .2 ..46 .3 ..48 .4 ..51 3 ..53 4 .. 55 ..56 ..57 1 1 c o m p u t e d t om og r a p hy CT m a g ne ti c r e s on a n c e i ma gi ng M R I 20 % 2 3% 1 00 % 10 % 1) 20 30 1 60 201 2 6 15 2 01 3 4 2 01 2 9 2,3) 500 0 4)
3 A u t o p sy i ma g i ng Ai Ai v i r tu al a u to p s y Vi r to p s y 5) 2 M R I M R I CT CT CT 6-13) M R I 14) Ai M R I Ai 15) M R I s h o r t-ta u i nv e r si o n r e c o ve r y S TI R 11,16,17) M R I S TI R f o r e n si c s e nti n el si g n 17) 1.
4 1 M R I CT M R I a CT b CT M R I a b 3 s h o rt-ta u i nv e r si o n re c o ve r y S TI R 1 T1 T2 18) B0 1 .2a M M M0 r a d i o f r e qu e n c y RF B0 Z M0 XY RF M Z M Z MZ XY MXY T1 T2 T1 t = T1 ( )= 0(1 1) (1 ) = 0 T2 t = T2 ( )= 0 2 (2) = 0 T1 MZ M0 63 T2 MXY M0 37 19)
5 M R I T1 T2 T1 T2 s p i n e c h o SE SE XY 90 RF 1 80 RF MZ T1 90 RF r e p e t i ti on ti me TR MXY T2 90 RF e c h o ti me TE T1 T2 4 RF o f f a c RF a RF b RF c b 1 .3 Z T1 XY T2 1 .4 M0 B0 RF 90 5 2 ST I R 2 0 , 2 1 S TI R T1 T2 180 i nv e r si o n r e c ov e r y IR IR M0 1 80 M0 IR MZ XY 0 M0 T1 IR 90 RF i nv e r si o n ti me TI S T I R 0 S T I R TR IR M R I c h e m i ca l s hi f t s el e c ti v e sa t u ra ti o n C H E S S C H E SS fi el d o f v i e w F O V S T I R M R I
6 M R I C H E S S S T I R 6 IR MZ IR a IR 1 8 0 M0 T1 b a b 7 S TI R 8 M R I M R I M R I 2 2 , 2 3) CT 24) MRI CT CT M RI T1 T2 T1 T2 pH 25) 1 1 C M R I 23) fl u i d att e n ua te d inv e r si o n re c o ve r y FL A I R TI 2 300 ms F L AI R 22,26) M RI CT 13,27) T1, T2 TR TE M R I 28)
7 9 F L AI R a b TI 2300 m s b a b 10 M R I M R I X M R I CT M R I ST I R 11 2 T1 , T2 M R I S T I R 1) 2) T1 T2 3) 4) 2, 3 S T IR 12 T1, T2.
8 1 T1 T2 T1, T2 , Sy n go Ma p ItTM M R I T1 , T2 IR SE 29-33) M RI 34) T1 T2 13 .2 .2 .1 Sy n go M a pI tTM T1 t h r e e-di m e n si o nal v ol u me t ri c i n te r p o l a te d b r ea t h h ol d ex ami n at i o n 3D V I B E 2 T1 35) S y n go Ma p I tTM T1 T1 e s ti m at e TR E r n s t 2 T1 T1 g r a d i e n t e c ho G R E Signal intensity (S)=k [1 ( 1 )] sin 1 ( 1 ) cos ( 2 ) (3 ) k : s cal i n g f a c to r, : p r o t o n d e n si ty, T2* : T2* val u e, : fl i p a ng l e S1 S2 2 T1 2.
9 1a 1= 1 sin 2 sin 1 sin cos 2 sin cos (4 ) T2 SE TR TE 2 T2 Sy ng o Ma p ItTM SE c o n t r as t s TE TE 36) 2 .1b T2 TE S y ng o Ma p ItTM T2 37) 14 a b 2 .1 S y ng o M a p ItTM T1 T2 T1 3D V IB E 2 T1 a T2 SE b 15 .2 .2 1 T1 Gd-D TPA TM 5 cm Gd-DTPA 0 .1 25, 0 .06 3, 0 .0 31, 1 6, 0 .00 8, 0 .0 04 mm ol /L 20 cm M R I 10 2 T2 0.
10 5 , 1. 0, 1. 5, 2 .0 , 2. 5 % 5 cm 2 . 2 15 cm T1 M R I 10 2 .2 T1 T2 16 .2 .3 Sy ng o Ma p I tTM 2 .1 S y n go Ma p ItTM T1 IR T1 S y ng o M a p ItTM T2 SE T2 S y ng o Ma p I tTM TR T1 e st i m at e TE s l i c e ga p T1 T2 S c a n p a r a m e t e r C o n v e n t i o n a l m e t h o d S y n g o M a p I tTM T1 ( I R ) T2 ( S E ) T1 m a p T2 m a p T R / T E ( m s ) 1 0 0 0 0 / 1 1 ( T I = 2 2 , 1 0 0 , 2 0 0 , 4 0 0 , 6 0 0 , 8 0 0 , 1 0 0 0 ) 1 0 0 0 0 / 1 3 , 3 0 , 5 0 , 7 5 , 1 0 0 , 1 5 0 , 2 0 0 1 5 / 1.
