FINSIG 05
FINSIG 05
FINSIG 05
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‚‚ ‚‚ ‚‚ƒƒ ƒƒ ƒƒ„„ „„ „„…… …… …… ……jj jj kk kkllmm mmnnoo oopp pp ppqq qq qqrr rr rrss ss sstt tt ttuu uu uuvv vv vvww ww wwxx xx xxyy yy yyzz zz zz{{ {{ {{||||||||||||~~ ~~ ~~ €€ €€ €€}}}}}}}}}}}}oo nn nn ll llmmkkjj jjiikk hh hhii iihh‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††gg gg gg ff ff ff ff‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡<strong>FINSIG</strong> 20<strong>05</strong> Kuopio, FinlandPrinciple of SPECT measurementsGamma camera in 2DElectronicsƒ ƒƒ„ „ „„… …‚‚ƒ|| }}} ~ ~ ~~ € € €€‚ ‚{{|w wwx x xxy y yyz z zz{ {vvwr rrs s sst t ttu u uuv vqqrm mmn n nno o oop p ppq qllm Aim is to measure a parallelprojection of the photons emittedfrom the object (Ideal) collimator blocks photonsthat are not parallel to its holes Photons are captured by thescintillation crystal “Signal” is amplified by thephotomultiplier tubes In 2D result is a row vector of photoncountsg ggh h hhi i iij j kkl lffgMikko Kervinen, Department of Applied Physics, University of Kuopio Slide 4
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