平成22年度 診療放射線技師 ... - kanamri.umin.ne.jp

1 2011/7/231 School of Allied Health Sciences, KitasatoUniversity MR 1S/N School of Allied Health Sciences, KitasatoUniversity MR 1 MR 2 3 4 HP School of Allied Health Sciences, KitasatoUniversity 1 2 2 MR 3 MR 3 1 4 5 6 HP School of Allied Health Sciences, KitasatoUniversity 1 2 3 4 5 6 7 HP School of Allied Health Sciences, KitasatoUniversity School of Allied Health Sciences, KitasatoUniversity S/N T1 T2 2011/7/232 School of Allied Health Sciences, KitasatoUniversity NEMA 3 8mm 1 Spin echo TR 800ms TE 14 20ms matrix 256x256 Gradient echo TR 150ms TE 4 8ms matrix 256x256 Parallel imaging ROI subtraction HP S N School of Allied Health Sciences, KitasatoUniversity (signal to noise ratio.)

2 SNR,S/N ,S/N) SNR ..School of Allied Health Sciences, KitasatoUniversity MRI SN School of Allied Health Sciences, KitasatoUniversity 2 Sp 2 Ns SNR=Sp/(Ns/ 2)ROI 1 ROI 1 School of Allied Health Sciences, KitasatoUniversity :20cm CuSO4 5H2O or 6H2O :T1 T2 :T1 T2 : 10 :QD Head Coil, or Body Coil :phased array coil School of Allied Health Sciences, KitasatoUniversity 10cm 85 20cm 85 T1 < 1200ms, T2 > 50ms, = 20 22 4 C 2011/7/233 School of Allied Health Sciences, KitasatoUniversity 20cm 25cm 10 FOV 115% Spinecho TR:800ms TE.

3 15ms matrixsize:256 256 1 FOV:24cm, 8mm Gradientecho TR:150ms TE:5ms FA: ernst ?? matrixsize:256 256 1 FOV:24cm, 8mm School of Allied Health Sciences, KitasatoUniversity S/N T1 T2 School of Allied Health Sciences, KitasatoUniversity NEMA 2 HP School of Allied Health Sciences, KitasatoUniversity MR MR RF RF ..School of Allied Health Sciences, KitasatoUniversity NEMA 75 (Smax) (Smin) Save U = (Smax-Smin)/2 Save= (Smax+Smin)/2U = ( /Save)*100%ROI 1 School of Allied Health Sciences, KitasatoUniversity : CuSO4 5H2O or 6H2O :T1 T2 :T1 T2 : 10 :QD Head Coil, and Body Coil.

4 Phased array coil ImageJ 2011/7/234 School of Allied Health Sciences, KitasatoUniversity 2 RF T1 < 1200ms, T2 > 50ms, = 20 22 4 C School of Allied Health Sciences, KitasatoUniversity ImageJ Java ImageJ Java DICOM Install imageJ web School of Allied Health Sciences, KitasatoUniversity Spinecho TR:800ms TE:15ms matrixsize:256 256 1 8mm FOV:20cm( ) 30cm( ) TLT School of Allied Health Sciences, KitasatoUniversity (1) QDHeadcoil 16cm 27cm (2) (3) ROI 80 ROI (Smax) (Smin) ROI Save U =(Smax-Smin)/2(2-1)Save=(Smax+Smin)/2(2- 2)U =( /Save)*100%(2-3)QD Head Coil School of Allied Health Sciences, KitasatoUniversity ROI ImageJ ROI [Analyze] [Measure] School of Allied Health Sciences, KitasatoUniversity 9 ImageJ [Process] [Filters] [Convolve] Convolver [OK] ROI S/N.

5 2011/7/235 School of Allied Health Sciences, KitasatoUniversity B1 B1 RF .. B1 School of Allied Health Sciences, KitasatoUniversity 1) : MRI 2007 2) : 1996 3) : MR 2008