PET PET
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- みりあ あいきょう
- 7 years ago
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1 21 PET 06S2037G
2 PET PET MPPC (APD) MPPC MPPC MPPC Gain Noise Rate Cross Talk BGO( ) LFS( ) LuAG Pr( ) BGO LFS LuAG BGO Pedestal LFS Pedestal
3 2 4.4 LuAG Pedestal A 27 A A.2 Compton A
4 PET PET Positron Emission Tomography PET PET 1 3[mm] γ γ 0.511[MeV] 180 γ 1 PET 1.1 PET F- FDG( ) F-FDG
5 PET PET CT CT MRI 1.3 PET-CT PET CT PET PET PET CT MRI PET PET PET PET 1.3 PET-CT
6 PET BGO( ) ( ) LuAG Pr( ) MPPC(Multi-Pixel Photon Counter) PET
7 2 MPPC 6 2 MPPC PMT(Photomultiplier Tube) (Photocathode) (Dynode) (Anode) (Electrode) (APD) p n (APD) APD pn
8 2 MPPC p n APD MPPC MPPC Multi-Pixel Photon Counter APD MPPC
9 2 MPPC MPPC 2.3 MPPC 2.2 MPPC 2.4 MPPC APD APD 2.5 APD 4ns MPPC MPPC
10 2 MPPC APD 2.3 MPPC MPPC Gain Gain G Q Q = eg (2.1) e C MPPC 1 C V bias V 0 1 Q = C(V bias V 0 ) (2.2) (2.1) Gain G = C e (V bias V 0 ) (2.3)
11 2 MPPC Noise Rate MPPC 1 Noise Rate Noise Rate MPPC Cross Talk APD Cross Talk MPPC MPPC Noise Rate (Photon Detective Efficiency PDE) = (2.4)
12 s t I τ I 0 ( I = I 0 exp t ) τ (3.1) τ 2 3ns ms POPOP(1,4- [ ] ) PPO(2,5- ) butyl-pdb(2-[4-tert- ]-1,3,4- )
13 PET PET γ PET PET 1 PET 3.1 t I τ I 0
14 3 13 ( I = I 0 exp t ) τ (3.2) BGO( ) BGO(Bi 4 Ge 3 O 12 ) 1970 NaI Tl 7 10 Bi γ γ BGO Bi 3+ Bi 3+ (Stokes shift) PET BGO 3.2 BGO 3.2 BGO
15 LFS( ) LFS LSO( ) LFS PET TOF-PET PET 3.3 LFS 3.3 LFS LuAG Pr( ) LuAG Pr 2004 Pr 3+ LuAG PET 3.4 LuAG LuAG BGO LFS LuAG PET PEM(Positron Emission Mammography) MRI-PET 1 30 PEM 3.4 LuAG
16 4 BGO LFS LuAG 15 4 BGO LFS LuAG 4.1 1mm 1mm MPPC 3mm 3mm 15mm BGO LFS LuAG MPPC 3mm 3mm Signal Gate (Self Trigger) 4.1 MPPC BGO LFS 4.2
17 4 BGO LFS LuAG Na 22 Na β [MeV] PET γ 12cm 4.3 BGO LFS LuAG BGO LFS LuAG Gate BGO Signal Gate 2.2µs Discriminator 100mV MPPC 71.1V 4.4 BGO Signal
18 4 BGO LFS LuAG LFS Signal 4.6 LuAG Signal 4.4 BGO 4.5 LFS 4.6 LuAG Signal Gate LFS LuAG Signal BGO
19 4 BGO LFS LuAG BGO Pedestal BGO Pedestal 22 Na ADC Gaussian fitting BGO Pedestal ADC [pC] Pedestal Mean ± 0.25[pC] (4.1) BGO Pedestal 22 Na 4.8 ADC Gaussian fitting PET 0.51[MeV] 0.51[MeV] fitting
20 4 BGO LFS LuAG BGO ADC BGO Mean ± 0.75[pC] (4.2) (4.1) (4.2) BGO = 236.8[pC] (4.3) 0.79[pC] (4.4) BGO (4.3) (4.4) ± 0.79[pC] (4.5)
21 4 BGO LFS LuAG LFS Pedestal BGO LFS Pedestal 22 Na ADC Gaussian fitting LFS Pedestal Pedestal Mean ± 0.275[pC] (4.6) LFS Pedestal 22 Na 4.10 ADC Gaussian fitting 0.51[MeV] fitting
22 4 BGO LFS LuAG LFS ADC LFS Mean 501 ± 0.675[pC] (4.7) (4.6) (4.7) LFS = [pC] (4.8) 0.73[pC] (4.9) LFS (4.8) (4.9) ± 0.73[pC] (4.10)
23 4 BGO LFS LuAG LuAG Pedestal LuAG Pedestal 22 Na ADC Gaussian fitting LuAG Pedestal Pedestal Mean ± 0.3[pC] (4.11) LuAG Pedestal 22 Na 4.12 ADC Gaussian fitting BGO fitting 0.51[MeV]
24 4 BGO LFS LuAG LuAG ADC LuAG Mean ± 0.475[pC] (4.12) (4.11) (4.12) LuAG = [pC] (4.13) 0.56[pC] (4.14) LuAG (4.13) (4.14) ± 0.56[pC] (4.15)
25 (4.5) (4.10) (4.15) BGO LFS LuAG ± 0.79[pC] ± 0.73[pC] ± 0.56[pC] LFS BGO 2 LuAG BGO 1 LFS BGO 8 10 LuAG BGO 3 LFS 2 LuAG 1/2 LuAG BGO BGO LFS Setting BGO BGO 2 BGO Signal Gate LFS BGO 1/10 BGO LFS Signal Signal PET 180 coincidence BGO LuAG 1 LuAG BGO BGO LuAG BGO MPPC 1 BGO LFS LuAG 480[nm] 416[nm] 310[nm] MPPC [nm] 440[nm] BGO LFS LuAG BGO LuAG LuAG MPPC 310[nm] 5.2 LFS γ BGO PET PET LuAG BGO LFS LFS BGO 3 1
26 5 25 LFS PET LFS 1 TOF(Time Of Flight)-PET PET γ 1 TOF-PET LFS LuAG TOF-PET PET PET 1 PET PET
27
28 A 27 A Compton γ X x [cm] I I = I 0 e µx µ 0 µ Compton µ photo µ comp µ pair µ = µ photo + µ comp + µ pair A.1 hν 0 T = hν I n (I n T A.1
29 A 28 Z 5 Z Compton Al 50[keV] Pb 500[keV] hν 0 µ photo µ photo = NZ 5 (hν 0 ) 7 2 ( A.1) N A.2 Compton Compton θ A-2 A-3 Compton A-3 hν 0 hν T θ δ A.2 Compton A.3 Compton
30 A 29 hν hν 0 hν = hν (1 cosθ) (hν 0 /mc 2 ) ( A.2) T T = hν 0 hν = hν mc 2 /hν 0 (1 cosθ) ( A.3) m c Compton Z Al [MeV] Pb 0.5 5[MeV] Compton µ comp hν 0 ( µ comp NZ = ln 2hν 0 hν 0 mc ) 2 N ( A.4) A.3 A-4 hν 0 mc 2 2 hν 0 2mc 2 = 1.02[MeV ] ( ) γ A.4
31 A 30 γ γ 1.02[MeV] (hν) = mc 2 = 0.51[MeV ] Z 2 Al 15[MeV] Pb 5[MeV] µ pair hν 0 { µ pair NZ ( 2 hν 0 2mc 2) ( hν 0 2mc 2 ( 1MeV ) ) = ( NZ 2 ln hν 0 hν0 2mc2) ( A.5) N Pb γ A-5 A.5 Pb
32 31 [1] PET [2] PET [3] [4] [5] [6] MPPC 2008 [7] MPPC 2009 [8] EL 2006 [9] [10] KEK 2007 [11] 2002 [12] ZECOTEK [13] Pr:LuAG PEM MRI/PET 2008 [14] Pr:LuAG 2008 [15] TGEM 2009 [16] SLHC MicroMEGAS 2008
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