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Toshiba Medical Systems Corporation
SPECT Part.1 ()
Toshiba Medical Systems Corporation
n l 1 l 2 l 3 l 4
n l l l
n l
u u u
l n
l l
n l l l
2
1
180 90
Toshiba Medical Systems Corporation
(SPECT)
Toshiba Medical Systems Corporation
1
Toshiba Medical Systems Corporation
Toshiba Medical Systems Corporation
(PMT)
533x387mm 3PMT53 2PMT 6
E.CAM
3PMT (76.2mm)
2PMT (50.8mm)
NaI
Toshiba Medical Systems Corporation
()
(X,Y)(Z)
NaI
X = Pi Wi
Pi Z = Pi
P1 W1:1
P2 W2:2
P3 W3:3
P4 W4:4
P5 W5:5
P6 W6:6
P7 W7:7
P8 W8:8
Pi Wi
Toshiba Medical Systems Corporation
(X,Y)(Z)
X = Pi Wi Pi
P1
P2
P3 3
P4 3
P5 2
P6 1
P7 0
P8 0
= 1x1+2x2+3x3+3x4+2x5+1x6+0x7+0x8 1+2+3+3+2+1+0+0 = 3.5 2(X,Y)
Pi
Toshiba Medical Systems Corporation
(Scatter)
140keV 120keV 100keV
70keV
Toshiba Medical Systems Corporation
Scatter
Primary
Energy
Coun
ts
Photo peak
(Primary)
Toshiba Medical Systems Corporation
keV 140 133 147
NaI10%
(FWHM)
Toshiba Medical Systems Corporation
Scatter
Total Primary
Energy
Cou
nts
Photo peak
1520%(Primary)(Scatter)
Toshiba Medical Systems Corporation
140keV7.5% 140keV2.5%
1min 13sec 2min 34sec
600k counts 99mTc
keV 140 130 150
7.5%
2.5%
Toshiba Medical Systems Corporation
93keV 185keV 93+185keV
93keV Scatter 185keV Scatter 93+185keV Scatter Free
Toshiba Medical Systems Corporation
n l (150/170keV)l (300keV)l (400keV)l (511keV)
n /l l l l
n l l l l l
AB
Toshiba Medical Systems Corporation
24.1mm
1.11mm
0.16mm LEHR
Toshiba Medical Systems Corporation
Toshiba Medical Systems Corporation
LEHR
LMEGP
10cm 20cm
Toshiba Medical Systems Corporation
140KeV 360KeV 360KeV
Toshiba Medical Systems Corporation
X
LEHR LMEGP MELP
120kV 3m
FWHM:7.5 mm 5.5 cpm/kBq
FWHM:10.3 mm 8 cpm/kBq
FWHM:12.5 mm 8.4 cpm/kBq
Toshiba Medical Systems Corporation
67Ga 93keV
185keV 296keV)
Toshiba Medical Systems Corporation
123I
TOSHIBA LMEGP
TOSHIBA LEHR
Siemens LEHR
123I-BMIPP
Toshiba Medical Systems Corporation
()
n Ri Intrinsic Resolution) l
n Rg Geometric Resolution) l l l 10cm
n (Rs System Resolution) l () l 10cm
n SPECT l SPECT l CenterRadialTangential3 l
Toshiba Medical Systems Corporation
FWHM & FWTM
FWHM (Full Width at Half Maximum)
FWTM (Full Width at Tenth Maximum)
Toshiba Medical Systems Corporation
FWHM
FWHMFWHM
Toshiba Medical Systems Corporation
XYZ XYZ
2
Toshiba Medical Systems Corporation
XYZ XYZ
A B
10cm
Toshiba Medical Systems Corporation
XYZ XYZ
10cm
Toshiba Medical Systems Corporation
SPECT
()
()
Toshiba Medical Systems Corporation
Rs = Ri2 + Rg2 Rs Ri Rg
(1)Ri = 3.8mm, Rg = 6.5mm Rs = 7.5mm
(2)
Ri = 4.5mm, Rg = 6.5mm Rs = 7.9mm
Toshiba Medical Systems Corporation
0
2
4
6
8
10
12
14
16
18
5 10 15 19
(mm)
(mmFWHM)
LMEGPLEAPLEHR
Toshiba Medical Systems Corporation
0cm 5cm 10cm 15cm 20cm 25cm 30cm 35cm
LEHR 7.5mm FWHM@10cm
LMEGP 10.3mm FWHM@10cm
Toshiba Medical Systems Corporation
7.5mm 8.6mm
Toshiba Medical Systems Corporation
SPECT
center radial
tangential1mm
SPECTFWHM
Toshiba Medical Systems Corporation
SPECT
@10cm[mm] [cpm/kBq]
A LEHR 7.4 5.5
LMEGP 10.3 8.0
B LEHR 7.4 5.5
LMEGP 10.6 8.7
C LEHR 7.4 5.4
ELEGP 10.0 8.6
D VXHR 7.4 3.8
VXGP 7.8 4.2
http://www.jsnmt.umin.ne.jp/contents/wghoukoku/standard/kikiinfo.html
Toshiba Medical Systems Corporation
n SPECT1315cmSPECT912mm34mm
n SPECT2025cmSPECT1518mm56mm
SPECT(FWHM)1/3
Toshiba Medical Systems Corporation
(SymbiaE)
64 128 256 512 FOV
1 9.60 4.80 2.40 1.20 533
1.23 7.80 3.90 1.95 0.98 500
1.45 6.62 3.31 1.66 0.83 424
1.78 5.39 2.70 1.35 0.67 345
2 4.80 2.40 1.20 0.60 307
2.29 4.19 2.10 1.05 0.52 268
2.67 3.60 1.80 0.90 0.45 230
3.2 3.00 1.50 0.75 0.38 192
Toshiba Medical Systems Corporation
SPECT
20cm 25cm
25
Toshiba Medical Systems Corporation
(SymbiaE)
64 128 256 512 FOV
1 9.60 4.80 2.40 1.20 533
1.23 7.80 3.90 1.95 0.98 500
1.45 6.62 3.31 1.66 0.83 424
1.78 5.39 2.70 1.35 0.67 345
2 4.80 2.40 1.20 0.60 307
2.29 4.19 2.10 1.05 0.52 268
2.67 3.60 1.80 0.90 0.45 230
3.2 3.00 1.50 0.75 0.38 192
Toshiba Medical Systems Corporation
SPECT
422mm (6.6mm)
344mm (5.4mm)
SPECTsmall heart
:166cm :68kg
Toshiba Medical Systems Corporation
SymbiaE
1.23 1.45 1.78
128128 3.9mm 3.3mm 2.7mm
6464 7.8mm 6.6mm 5.4mm
498mm 422mm 344mm
SymbiaE/E.CAM6464 1.78
()
5.4mm
RI
Toshiba Medical Systems Corporation
Emission & Transmission
Transmission
Emission
Toshiba Medical Systems Corporation
180360
180 360
J Nuci Med 23: 661, 1982
Toshiba Medical Systems Corporation
A1 A2
B1 B2
360 180A1/A2 1.00 1.09 B1/B2 1.01 1.21
Tc-99m 360 180A1/A2 1.03 1.12 B1/B2 1.02 1.27
Tl-201 20cm 360180
180SPECT acquisition is generally preferred for both 201Tl and 99mTc protocols because of the higher contrast and resolution of the reconstructed images and greater patient throughput, although the use of 360acquisition has been advocated on the basis of its superior image uniformity and greater immunity to artifacts. Guido Germano. Technical Aspects of Myocardial SPECT Imaging. J Nucl Med.2001;42:1499-1507
180360
Toshiba Medical Systems Corporation
(180)
44-224deg 92-272deg 136-316deg 180-360deg
Toshiba Medical Systems Corporation
180360
360 180
RAO45
LPO45
LAO45
180RAO45LAO45LPO45
Toshiba Medical Systems Corporation
180360
360 180
180
Toshiba Medical Systems Corporation
180360
360 180
11
360
Toshiba Medical Systems Corporation
180360 ()
Kenichi Nakajima, et al. Ann Nucl Med (2007) 21:505511
Toshiba Medical Systems Corporation