TY - ADVS AU - Mawlawi,Osama TI - Fundamental principles of positron emission tomography (PET): part 1 of 2 T2 - Medical imaging : imaging techniques for pre-clinical and clinical applications, PY - 2022/// CY - London PB - Henry Stewart Talks KW - Imaging systems in medicine KW - Tomography, Emission KW - Calibration KW - Diagnostic Imaging KW - Image Processing, Computer-Assisted KW - Imaging, Three-Dimensional KW - Positron Emission Tomography Computed Tomography KW - Positron-Emission Tomography KW - Radiation Exposure KW - Tomography, X-Ray Computed N1 - Animated audio-visual presentation with synchronized narration; Title from title frames; Updated version of a talk first published in 2010; Contents: Principles of PET imaging -- The PET process -- Positron decay -- Nuclide production -- Decay schemes of 18-F -- Image reconstruction -- Different views when using PET scanners -- The process of image formation in details -- Annihilation -- Detector/photomultiplier design -- Energy trigger, measurement and qualification -- Event positioning -- Coincidence assessment of singles events -- Steps involved in coincidence assessment -- Coincidence acceptance angles (Transverse & Axial) -- Coincidence timing comparison -- Overall LOR determination process -- LOR data storage -- Sample sinograms -- Detector assembly -- Direct and cross planes -- Axial sampling and slice sensitivity -- Michelograms -- Further improvement in sensitivity -- 2D and 3D -- Inter-plane septa -- Type of recorded events -- Two ways of measuring randoms in PET -- Randoms estimation -- Scatter and its extent in PET images -- KCPS vs. activity concentration -- Scatter correction -- Power of PET by quantification -- Normalization -- Dead-time -- Decay correction -- Geometric correction -- Attenuation measurement -- Calculated attenuation correction -- Segmented attenuation correction -- Effect of attenuation correction on PET image -- CT based attenuation correction -- Calibration -- Factors affecting image resolution -- Detector size -- Depth of interaction -- Resolution improvement -- Positron range -- Non co-linearity -- Linear and angular sampling -- Image matrix -- Reconstruction filter; Access restricted to subscribers UR - https://hstalks.com/bs/1668/ UR - https://hstalks.com/bs/p/443/ ER -