Title :
High spatial resolution reconstruction technique for SPECT using fan-beam collimator
Author :
Ichihara, T. ; Nambu, K. ; Motomura, N.
Author_Institution :
Toshiba Nasu Works, Tochigi, Japan
Abstract :
The authors propose an algorithm which directly filters and backprojects the fan-beam data within a limited area close to the fan-beam collimator surface without rebinding into parallel beam geometry. The proposed reconstruction method improves spatial resolution in SPECT (single photon emission computed tomography) for brain studies using fan-beam collimators. When projection image data with a 128×128 matrix are used, this method improves spatial resolution and image quality. This matrix size is suitable for clinical studies with an acquisition time within 20 minutes
Keywords :
computerised tomography; image reconstruction; medical image processing; radioisotope scanning and imaging; 128 pixel; 16384 pixel; 20 min; SPECT; acquisition time; algorithm; brain studies; fan-beam collimator; image quality; medical diagnostic imaging; nuclear medicine; parallel beam geometry; single photon emission computed tomography; spatial resolution; Collimators; Geometry; Image converters; Image reconstruction; Imaging phantoms; Modeling; Positron emission tomography; Reconstruction algorithms; Spatial resolution; Surface reconstruction;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301468
