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000843635 1001_ $$0P:(DE-Juel1)159131$$aBerneking, Arne$$b0$$eCorresponding author
000843635 245__ $$aA new PET detector concept for compact preclinical high-resolution hybrid MR-PET
000843635 260__ $$aAmsterdam$$bNorth-Holland Publ. Co.$$c2018
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000843635 520__ $$aThis work presents a new PET detector concept for compact preclinical hybrid MR-PET. The detector concept is based on Linearly-Graded SiPM produced with current FBK RGB-HD technology. One 7.75  mm x 7.75  mm large sensor chip is coupled with optical grease to a black coated 8  mm x 8  mm large and 3 mm thick monolithic LYSO crystal. The readout is obtained from four readout channels with the linear encoding based on integrated resistors and the Center of Gravity approach.To characterize the new detector concept, the spatial and energy resolutions were measured. Therefore, the measurement setup was prepared to radiate a collimated beam to 25 different points perpendicular to the monolithic scintillator crystal. Starting in the center point of the crystal at 0  mm / 0  mm and sampling a grid with a pitch of 1.75  mm, all significant points of the detector were covered by the collimator beam.The measured intrinsic spatial resolution (FWHM) was 0.74 +/- 0.01  mm in x- and 0.69 +/- 0.01  mm in the y-direction at the center of the detector. At the same point, the measured energy resolution (FWHM) was 13.01 +/- 0.05  %. The mean intrinsic spatial resolution (FWHM) over the whole detector was 0.80 +/- 0.28  mm in x- and 0.72 +/- 0.19  mm in y-direction. The energy resolution (FWHM) of the detector was between 13 and 17.3  % with an average energy resolution of 15.7 +/- 1.0  %. Due to the reduced thickness, the sensitivity of this gamma detector is low but still higher than pixelated designs with the same thickness due to the monolithic crystals. Combining compact design, high spatial resolution, and high sensitivity, the detector concept is particularly suitable for applications where the scanner bore size is limited and high resolution is required — as is the case in small animal hybrid MR-PET.
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000843635 7001_ $$0P:(DE-HGF)0$$aGola, Alberto$$b1
000843635 7001_ $$0P:(DE-HGF)0$$aFerri, Alessandro$$b2
000843635 7001_ $$0P:(DE-Juel1)169335$$aFinster, Felix$$b3
000843635 7001_ $$0P:(DE-HGF)0$$aRucatti, Daniele$$b4
000843635 7001_ $$0P:(DE-HGF)0$$aPaternoster, Giovanni$$b5
000843635 7001_ $$0P:(DE-Juel1)131794$$aShah, N. J.$$b6$$ufzj
000843635 7001_ $$0P:(DE-HGF)0$$aPiemonte, Claudio$$b7
000843635 7001_ $$0P:(DE-Juel1)164254$$aLerche, Christoph$$b8$$ufzj
000843635 773__ $$0PERI:(DE-600)1466532-3$$a10.1016/j.nima.2018.01.040$$gVol. 888, p. 44 - 52$$p44 - 52$$tNuclear instruments & methods in physics research / A$$v888$$x0168-9002$$y2018
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