2020 TEIN Winter Workshop [Day 2] SPECT

This lecture, part of the 2020 TEIN Winter Workshop, provides a comprehensive overview of Single Photon Emission Computed Tomography (SPECT). The speaker, Jae Sung Lee, PhD, from Seoul National University, begins by describing the basic components of a SPECT system, including gamma cameras, collimators, and detector configurations. He explains the trade-offs between sensitivity and spatial resolution, emphasizing the role of collimator design. The lecture then covers image reconstruction methods, focusing on filtered backprojection and iterative reconstruction. A significant portion is dedicated to physical effects that degrade image quality, such as attenuation and scatter. The speaker details methods for attenuation correction, including the use of transmission scans and the Chang method. Scatter correction techniques, such as energy windowing, are also discussed. The concept of partial volume effect and recovery coefficients is introduced, along with methods for system performance evaluation, including spatial resolution, sensitivity, and uniformity measurements. The lecture concludes with a question-and-answer session addressing clinical applications and limitations.