Title :
Constrained IntraSPECT reconstruction from SPECT projections
Author :
Manglos, Stephen H. ; Young, Thomas M.
Author_Institution :
Dept. of Radiol., State Univ. of New York, Syracuse, NY, USA
fDate :
31 Oct-6 Nov 1993
Abstract :
A new method is presented for tomographic image reconstruction, called “Intrinsic Transmission SPECT” or just “IntraSPECT”. It simultaneously reconstructs both the attenuation map (μ) and an attenuation-compensated activity map (A), using only the SPECT projections. A modified ART-algorithm (ART-IntraSPECT) was developed and tested with a simulated thorax. The μ-image reconstructed with ART-IntraSPECT clearly exhibited all relevant anatomical structure, such as lungs and spine vs soft tissue. However, both A and μ-images were quantitatively inaccurate. The accuracy was considerably improved by applying reasonable tissue-type constraints to the μ-image
Keywords :
image reconstruction; medical image processing; single photon emission computed tomography; SPECT projections; anatomical structure; attenuation map; attenuation-compensated activity map; constrained IntraSPECT reconstruction; lungs; medical diagnostic imaging; modified ART-algorithm; nuclear medicine; simulated thorax; soft tissue; spine; tissue-type constraints; tomographic image reconstruction method; Anatomical structure; Attenuation measurement; Image reconstruction; Iterative algorithms; Lungs; Radiology; Subspace constraints; Testing; Thorax; Tomography;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1993., 1993 IEEE Conference Record.
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1487-5
DOI :
10.1109/NSSMIC.1993.373561
