ADC	Analog-to-Digital Converter
APD	Avalanche Photo Diode
ASIC	Application Specific Integrated Circuit
CBF	Cerebral Blood Flow
CNC	Computerized Numerical Control
CPU	Central Processing Unit
CRT	Coincidence Resolving Time
CT	Computed Tomography
CTW	Coincidence Timing Window
DAC	Digital-to-Analog Converter
DAQ	Data Acquisition
DHM	Detector Head Module
DOI	Depth Of Interaction
dSiPM	digital SiPM
EPI	Echo-Planar-Imaging
FDG	18F-Fluorodeoxyglucose
FOV	Field Of View
FWHM	Full Width at Half Maximum
FPGA	Field-Programmable Gate Array
GATE	GEANT4 Application for Emission Tomography
G-APD	Geiger-mode APD
GUI	Graphical User Interface
IC	Integrated Circuit
ICSR	Inter-Crystal Scatter Recovery
LC	Lucent Connector
LDO	Low Dropout Regulator
LGSO	Lutetium Gadolinium Oxyortho Silicate
LSZH	Low Smoke Zero Halogen
LVDS	Low Voltage Differential Signaling
LYSO	Lutetium Yttrium Oxyortho Silicate
MLEM	Maximum-Likelihood Expectation-Maximization
MPPC	Multi Pixel Photon Counter
MR	Magnetic Resonance
MRI	Magnetic Resonance Imaging
MTP	Multi-fiber Termination Push-on/Pull-off
NECR	Noise-Equivalent Count Rate
NEMA	National Electrical Manufacturers Association
NEMA-NU4	NEMA Standards Publication NU 4-2008
OSEM	Ordered Subset Expectation Maximization
OM3	Optical Multimode 3
PCB	Printed Circuit Board
PET	Positron Emission Tomography
PETA6SE	Position-Energy-Timing Application Specific Integrated Circuit, version 6, Single Ended
PLL	Phase-Locked-Loop
QDC	Charge-to-Digital Converter
RAM	Random Access Memory
RF	Radio Frequency
SAFIR	Small Animal Fast Insert for MRI
SAFIR-I	Small Animal Fast Insert for MRI detector I
SAFIR-II	Small Animal Fast Insert for MRI detector II
SBD	SAFIR Bias Distribution
SBT	SAFIR Bias and Temperature
SDIP	SAFIR Digital Interface Board PETA
SFCD	SAFIR Fast Control Distribution
SFCM	SAFIR Fast Control Master
SFP	Small Form-factor Pluggable
SiPM	Silicon Photomultiplier
SNR	Signal-to-Noise Ratio
SPOW	SAFIR Power Converter
SPPD	SAFIR Primary Power Distribution
SP6	SAFIR PETA6 Board
SSD	Solid State Disk
SSPD	SAFIR Secondary Power Distribution
STIR	Software for Tomographic Image Reconstruction
TAC	Time-Activity Curve
TDC	Time-to-Digital Converter
TOF	Time-of-Flight
UDP	User Datagram-Protocol
UPC	Ultra Physical Contact
USB	Universal Serial Bus
USR	Ultra Shield Refrigerated