Title :
Data processing and image reconstruction methods for the HEAD PENN-PET scanner
Author :
Karp, J.S. ; Becher, A.J. ; Matej, S. ; Kinahan, P.E.
Author_Institution :
Dept. of Radiol., Pennsylvania Univ., Philadelphia, PA, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
Methods of reconstruction and quantitation are developed for a 3D system and are evaluated on the septa-less HEAD PENN-PET scanner, which has a very large axial acceptance angle (θmax=±28° in the center) and large axial field-of-view of 256 mm. To overcome the difficulties of data storage and reconstruction time with 3D reconstruction, the authors have reduced the size of the 4-D projection matrix required for 3D-RP reconstruction, and compared the results to the Fourier rebinning (FORE) algorithm. Both approaches achieve a favorable tradeoff in data storage requirements, reconstruction time, and accuracy that are suitable for clinical use. The authors have also studied the application of the FORE algorithm to transmission scans acquired with a single point source (137Cs) so that data quantitation can be performed
Keywords :
biomedical equipment; image reconstruction; medical image processing; positron emission tomography; 256 mm; 4-D projection matrix; 137Cs; Cs; FORE algorithm; Fourier rebinning algorithm; HEAD PENN-PET scanner; accuracy; data processing methods; data quantitation; data storage requirements; image reconstruction methods; medical diagnostic imaging; nuclear medicine; reconstruction time; single point source; Brain; Data processing; Detectors; Head; Image reconstruction; Memory; Positron emission tomography; Radiology; Sampling methods; Spatial resolution;
Journal_Title :
Nuclear Science, IEEE Transactions on
