頸部 PPllaaqquuee 性状評価 検討 Black Blood PPU M2D BB pulse delay
(CAS).,MRI,.
VISTA (Volume Isotropic TSE Acquisition) Refocusing angle T1, T2 Start up echo T1 Flow compensation T1 Dual SAT (REST ) TR, TE, FA CAS, Ope Black Blood PPU M2D BB pulse delay
TR T1 VISTA T2 VISTA 500 3000 Dual Sat 40 TE 16 100 8.3 TSE factor 15 40 40 Start up echos 1 3 3 Profile order low high linear linear Flip angle 90 90 20 Refocusing angle 40 40 Matrix scan 208 208 240 Slices 10 10 25 Slice thickness 3/-1.5 3/-1.5 3 Foldover direction RL RL AP Flow compensation (-) (-) Total scan time 3 29 2 33 2 40
SNR SI SD air
VISTA T1 Refocusing angle RA 30 RA 35 RA 40 RA 45 RA 50 SNR 22.3 SNR 17.8 SNR 14.6 SNR 15.0 SNR 15.8
VISTA T1 Refocusing angle RA 30 RA 35 RA 40 RA 45 RA 50 SNR 22.3 SNR 17.8 SNR 14.6 SNR 15.0 SNR 15.8
VISTA T1 Start up echo echo 1 echo 2 echo 3 TE 14 TE 21 TE 27
VISTA T1 Start up echo echo 1 echo 2 echo 3 TE 14 TE 21 TE 27
VISTA T2 Refocusing angle RA 30 RA 35 RA 40 RA 45 RA 50 SNR 34.1 SNR 33.7 SNR 33.4 SNR 26.7 SNR 34.6
VISTA T2 Refocusing angle RA 30 RA 35 RA 40 RA 45 RA 50 SNR 34.1 SNR 33.7 SNR 33.4 SNR 26.7 SNR 34.6
VISTA T1 Flow compensation sensitized SNR 31.3 SNR 28.4 SNR 22.8
VISTA T1 Flow compensation sensitized SNR 31.3 SNR 28.4 SNR 22.8
VISTA T2 Flow compensation sensitized SNR 14.6 SNR 9.6 SNR 10.4
VISTA T2 Flow compensation sensitized SNR 14.6 SNR 9.6 SNR 10.4
T1 BB trigger delay longest ECG longest PPU shortest PPU VISTA SNR 25.4 SNR 27.8 SNR 25.8
T2 BB trigger delay longest ECG longest PPU shortest PPU VISTA SNR 5.9 SNR 6.4 SNR 6.8
TR T1 VISTA T2 VISTA 500 3000 TE TES factor Start up echos Profile order Flip angle Refocusing angle Matrix scan Slices Slice thickness Foldover direction Flow compensation Total scan time 21(16) 21 2(1) low high 90 35(40) 208 10 3/-1.5 RL (-) 3 29 100 40 3 linear 90 30(40) 208 10 3/-1.5 RL (-) 2 33
VISTA (Volume Isotropic TSE Acquisition) Refocusing angle T1, T2 Start up echo T1 Flow compensation T1 Dual SAT (REST ) TR, TE, FA CAS, Ope Black Blood PPU M2D BB pulse delay
T1 Dual SAT FA FA 10 FA 20 FA 30 FA 40 FA 50 SNR 9.1 SNR 13.2 SNR 13.3 SNR 11.3 SNR 10.9
T1 Dual SAT FA FA 10 FA 20 FA 30 FA 40 FA 50 SNR 9.1 SNR 13.2 SNR 13.3 SNR 11.3 SNR 10.9
T1 Dual SAT TE TE 8.3 TE 10.3 TE 12.3 TE 14.3 SNR 13.5 SNR 14.0 SNR 10.5 SNR 11.5 S TE 16.3 TE 18.3 TE 20.3 TE 21.3 SNR 9.5 SNR 8.8 SNR 9.3 SNR 8.8
T1 Dual SAT TE TE 8.3 TE 10.3 TE 12.3 TE 14.3 SNR 13.5 SNR 14.0 SNR 10.5 SNR 11.5 S TE 16.3 TE 18.3 TE 20.3 TE 21.3 SNR 9.5 SNR 8.8 SNR 9.3 SNR 8.8
T1 Dual SAT TR,FA FA 10 FA 20 FA 30 FA 40 FA 50 TR 30 TR 40 TR 50
T1 Dual STA TR,FA SNR FA 10 FA 20 FA 30 FA 40 FA 50 TR 30 9.4 12.0 12.6 11.7 10.6 TR 40 9.6 12.9 13.8 13.6 10.6 TR 50 7.1 12.2 11.7 10.2 8.8
T1 Dual STA TR,FA SNR FA 10 FA 20 FA 30 FA 40 FA 50 TR 30 9.4 12.0 12.6 11.7 10.6 TR 40 9.6 12.9 13.8 13.6 10.6 TR 50 7.1 12.2 11.7 10.2 8.8
TR TE Dual SAT 40 8.3 TES factor Start up echos Profile order Flip angle 20 Refocusing angle Matrix scan Slices Slice thickness Foldover direction 240 25 3 AP Flow compensation Total scan time 2 40
VISTA (Volume Isotropic TSE Acquisition) Refocusing angle T1, T2 Start up echo T1 Flow compensation T1 Dual SAT (REST ) TR, TE, FA CAS, Ope Black Blood PPU M2D BB pulse delay
Plaque MRA, VISTA T1WI,T2WI T1WI Plaque MRI, (ratio). ratio = Plaque T1WI / Muscle ( ) ratio 1.4.
1143.88±35.86
, P/M ratio 13, CAS 10,Ope 3. CAS MRI P/M ratio1.4,plaque, Angio.
CAS Angio 3D CT MRA
CAS P/M ratio 1.36
Ope
Ope P/M ratio 1.63
Black Blood PPU M2D BB pulse delay BB pulse delay default T1 Inversion delay= T1blood ( ln2 - ln[1+exp(-tr/t1blood)]) TR=TR(beats) R-R interval time の平均 T1blood=1200ms
T1 Inversion delay Rate 50 IR 456 Rate 60 IR 398.7 Rate 70 IR 353.6 Rate 80 IR 317.3 PPU Rate 55 IR 425.5 Rate 90 IR 287.6
T1 Inversion delay 5000" 4500" 4000" 3500" 3000" 2500" 2000" 1500" 1000" 500" 0" 0" 0.5" 1" 1.49" 1.99" 2.49" 2.99" 3.49" 3.98" 4.48" T1"Rate"90" T1"Rate"80" T1"Rate"70" T1"Rate"60" T1"Rate"50"
T1 Inversion delay 5000" 5000" 4500" 4500" 4000" 4000" 3500" 3000" 2500" 2000" 1500" 1000" T1"Rate"90" T1"Rate"80" T1"Rate"70" T1"Rate"60" T1"Rate"50" 3500" 3000" 2500" 2000" 1500" 1000" T1"Rate"90" T1"Rate"80" T1"Rate"70" T1"Rate"60" T1"Rate"50" 500" 500" 0" 0" 0.45"0.89"1.34"1.78"2.23"2.67"3.12"3.57"4.01"4.46" 4.9" 5.35" 0" 0" 0.64" 1.28" 1.92" 2.56" 3.2" 3.84" 4.48" 5.21" PPU Rate 60 PPU Rate 55 5000" 5000" 4500" 4500" 4000" 4000" 3500" 3000" 2500" 2000" 1500" 1000" T1"Rate"90" T1"Rate"80" T1"Rate"70" T1"Rate"60" T1"Rate"50" 3500" 3000" 2500" 2000" 1500" 1000" A" B" C" 500" 500" 0" 0" 0.5" 1" 1.49" 1.99" 2.49" 2.99" 3.49" 3.98" 4.48" 0" T1"Rate"50" T1"Rate"60" T1"Rate"70" T1"Rate"80" T1"Rate"90" PPU Rate 65
T2 Inversion delay Rate 50 IR 679.5 Rate 60 IR 624.2 Rate 70 IR 574 Rate 80 IR 529.5 PPU Rate 55 IR 651.2 Rate 90 IR 490.3
T2 Inversion delay 5000" 4500" 4000" 3500" 3000" 2500" 2000" 1500" T2"Rate"90" T2"Rate"80" T2"Rate"70" T2"Rate"60" T2"Rate"50" 1000" 500" 0" 0" 0.45" 0.89" 1.34" 1.78" 2.23" 2.67" 3.12" 3.57" 4.01" 4.46" 4.9" 5.35"
T2 Inversion delay 5000" 5000" 4500" 4500" 4000" 4000" 3500" 3000" 2500" 2000" 1500" 1000" T2"Rate"90" T2"Rate"80" T2"Rate"70" T2"Rate"60" T2"Rate"50" 3500" 3000" 2500" 2000" 1500" 1000" T2"Rate"90" T2"Rate"80" T2"Rate"70" T2"Rate"60" T2"Rate"50" 500" 500" 0" 0" 0.5" 1" 1.49" 1.99" 2.49" 2.99" 3.49" 3.98" 4.48" 0" 0" 0.45"0.89"1.34"1.78"2.23"2.67"3.12"3.57"4.01"4.46" 4.9" 5.35" PPU Rate 60 PPU Rate 55 5000" 5000" 4500" 4500" 4000" 4000" 3500" 3000" 2500" 2000" 1500" 1000" T2"Rate"90" T2"Rate"80" T2"Rate"70" T2"Rate"60" T2"Rate"50" 3500" 3000" 2500" 2000" 1500" 1000" A" B" C" 500" 500" 0" 0" 0.64" 1.28" 1.92" 2.56" 3.2" 3.84" 4.48" 5.21" 0" T2"Rate"50" T2"Rate"60" T2"Rate"70" T2"Rate"80" T2"Rate"90" PPU Rate 65
5000" 5000" 4500" 4500" 4000" 4000" 3500" 3500" 3000" 2500" 2000" 1500" A" B" C" 3000" 2500" 2000" 1500" A" B" C" 1000" 1000" 500" 500" 0" 0" T1"Rate"50" T1"Rate"60" T1"Rate"70" T1"Rate"80" T1"Rate"90" T2"Rate"50" T2"Rate"60" T2"Rate"70" T2"Rate"80" T2"Rate"90" 5000" 4500" 4000" 3500" 3000" 2500" 2000" 1500" 1000" 500" 0" 5000" 4500" 4000" 3500" 3000" 2500" 2000" 1500" 1000" 500" 0" T1"Rate"50" T1"Rate"60" T1"Rate"70" T1"Rate"80" T1"Rate"90" T2"Rate"50" T2"Rate"60" T2"Rate"70" T2"Rate"80" T2"Rate"90" T1 T2