Introduction to Positron Emission Tomography - Waisman ...

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P.E.T. measures Concentration of Radioactivity1) Gamma-rays escape from body:External detection possible.2) Two gamma rays emittedoat 180 when a positronannihilates:The annihilation occuredsomewhere betweenthe two detec<strong>to</strong>rs.3) Regions with greaterradioactivity levelsproduce more LORs:Concentration of radioactivitycan be measured and quantified.
P.E.T. yields Quantitative results.( µCi/cc tissue )Corrections must be applied <strong>to</strong> raw data:1) Dead-time, Random events2) Calibration3) Normalization4) Scatter-correction5) Attenuation correction6) Reconstruction
Page 1 and 2: Introduction toPositron Emission To
Page 3 and 4: Positron Emission Tomographydetecto
Page 5 and 6: Positron Emission Tomography
Page 7: Positron Emission Tomography
Page 11 and 12: Effect of Corrections on ImagesScat
Page 13 and 14: Normalizationdetectorring
Page 15 and 16: Gamma-ray attenuation proportional
Page 17 and 18: PET Data Acquistionraw sinogramRadi
Page 19 and 20: Three Angular ViewsAngular View #1(
Page 21: Image Reconstructionit’s magic!ra

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