A comparison of four pre-processing attenuation correction methods for single photon emission computed tomography

• Main Authors: Sayed, Inayatullah Shah, Leeman, Sidney, Betts, Mark
• Format: Article
• Language: English
• Published: Meharan University of Engineering and Technology, Jamshoro, Sindh, Pakistan 1998
• Subjects: QC Physics
• Online Access: http://irep.iium.edu.my/6057/1/Comparison_4ATC.pdf; http://irep.iium.edu.my/6057/

The accurate quantitation of Single Photon Emission Computed Tomography (SPECT)images is restricted due to the attention of gamma photos in patient's body. A number of approximate attenuation correction methods have been proposed to date. In this work, an attempt is made to implement four existing pre-processing (arithmetic mean-based and geometric mean based) attenuation correction methods, and to test via gathering the data by scanning a cylindrical phantom over 360 degrees. The phantom was filled with water and Tc-99m solution was uniformly distributed. An acrylic block with holes and various sizes at different interior locations with respects to wall of phantom simulating "hot" regions was used.