FINSIG 05

DD DDEEFF FFGGHH HH II IIJJ JJKKLL LLMMNN NNOOPP PPQQRR RRSSTT TT TTUU UU UUVV VV VVWW WW WWXX XX XXYY YY YYZZZZZZZZZZZZ\\ \\ \\]] ]] ]]^^ ^^ ^^__ __ __`` `` ``aa aa aabb bb bbcc cc cc cc[[[[[[[[[[[[SS RRSS QQ QQ PP OO NNOOMMMM LL KK KK JJ HH HH II II FFGG GGeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddEE EE DD DDeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeFINSIG 2005 Kuopio, FinlandPrinciple of SPECT measurementsGamma camera in 2DElectronicsa aab b bbc c``aZZ [[[ \ \ \\] ] ]]^^ ^^_ _ __``YYZU UUV V VVW W WWX X XXY YTTUP PPQ Q QQR R RRS S SST TOOPK KKL L LLM M MMN N NNO OJJK 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 photoncountsE EEF F FFG G GGH H IIJ JDDEMikko Kervinen, Department of Applied Physics, University of Kuopio Slide 4