Body DWI
/14/2015 Sat.
Osaka Medical Center for Cancer and Cardiovascular Disease
Body-DWI
! 3T
:
! 
! 
164
MRI
Body-DWI
3T
etc.
MRI
MRI
66.3 %
29.5 %
MRI 56.6 %
Osaka Medical Center for Cancer and Cardiovascular Disease
Body-DWI
900"
800"
700"
40"
WB.DWI
MRI
WB.DWI
35"
30"
600"
25"
500"
20"
400"
15"
300"
10"
200"
100"
5"
0"
0"
2010"
2011"
2012"
2013"
2014"
Body-DWI
"
4%"
2%
2%
1%
3%
8%
15%
3%
4%
8%
58%
17%
25%
4%
"
4%
22%
6%"
14%
2014
Osaka Medical Center for Cancer and Cardiovascular Disease
Body-DWI
MRI T1WI, T2 STIR-sag
DWI-ax
Half body DW-MRI
MRI
1
…
Osaka Medical Center for Cancer and Cardiovascular Disease
Modality: SIEMENS 3 T Trio, A Tim System
T1 sag
(a)
composing
T2 STIR
(b)
composing
DWI MIP
(c)
coronal_MPR
DWI MIP
Fusion
T1 cor
diffusion
fusion
WIP
Osaka Medical Center for Cancer and Cardiovascular Disease
Axial image
DWI-MIP
ADC image
Osaka Medical Center for Cancer and Cardiovascular Disease
Axial image
DWI-MIP
ADC image
Osaka Medical Center for Cancer and Cardiovascular Disease
Susceptibility
Eddy current MPG
MPG
3T
1.5T Osaka Medical Center for Cancer and Cardiovascular Disease
MPG
Eddy current
MPG
MPG
On Off
Osaka Medical Center for Cancer and Cardiovascular Disease
bipolar Twice-refocused SE
180°
90°
180°
RF
MPG
! MPG
2
180°
Osaka Medical Center for Cancer and Cardiovascular Disease
Twice-refocused SE
TE
SNR
ADC
! 
…
MPG
! SNR
…
TE
Osaka Medical Center for Cancer and Cardiovascular Disease
MPG
bipolar
180°
90°
TE
180°
RF
MPG
monopolar
TE
90°
RF
MPG
180°
MPG
monopolar +
WIP
90°
180°
RF
MPG
Osaka Medical Center for Cancer and Cardiovascular Disease
TE
bipolar
monopolar +
monopolar +
bipolar
90°
180°
180°
90°
RF
RF
MPG
MPG
180°
! 
! 
! 
SNR
ADC
Osaka Medical Center for Cancer and Cardiovascular Disease
(mm)
bipolar
261.6
monopolar +
265.0
268 mm
268.0
Osaka Medical Center for Cancer and Cardiovascular Disease
TE
SNR
TE (ms)
bipolar
bipolar
monopolar+
107
89
product"
mono+"monopolar +
100""
80""
60""
40""
20""
0""
(JSMRM2011 Miyazaki et al)
ADC: phantom & volunteers
bipolar
monopolar +
reference
2.2
2.2
1.9~2.4
視床下部
肝臓
0.71±0.04
0.52±0.14
0.67±0.02
0.81±0.24
0.7
0.8∼1.4
筋肉
1.05±0.06
1.35±0.07
1.5∼2.4
腎臓
1.80±0.20
1.97±0.08
1.5∼2.4
QC phantom
(NiSO4 6H2O)
（× 10-3 mm2/s）
Osaka Medical Center for Cancer and Cardiovascular Disease
Extra fat suppression
(Slice-selective gradient reversal)
Gx
Water
Fat
2
Gx
Water
Fat
Water
Fat
Osaka Medical Center for Cancer and Cardiovascular Disease
DWI
ADC
CHESS
ExFS+CHESS
Osaka Medical Center for Cancer and Cardiovascular Disease
前立腺癌骨転移
Osaka Medical Center for Cancer and Cardiovascular Disease
STIR sagittal composing
ADC（胸骨）： 0.69 × 10-3 mm2/s
ADC（骨盤）： 0.50 × 10-3 mm2/s
bipolar vs. monopolar+
bipolar
20 25
8
monopolar +
8~10
2
! 
!  3T
! 
body-DWI

Van-der-Waals-Kräfte - Max

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