Title :
Reconstruction of attenuation map in SPECT imaging
Author_Institution :
Inst. of Theor. & Appl. Mech., Acad. of Sci., Novosibirsk, Russia
fDate :
31 Oct-3 Nov 1996
Abstract :
The influence of linear attenuation presents large difficulties for quantitative single-photon emission computerized tomography (SPECT) in medical imaging. To apply an attenuation correction algorithm, one has first to reconstruct the attenuation map from transmission measurements. In this case the use of an external source is required, that increases the cost of the equipment and complicates the measurements. We present a method allowing us to reconstruct the attenuation map from SPECT emission projections alone. The method has been derived by applying a uniqueness condition permitting physically relevant solution to be found. The approach has been evaluated on experimental data obtained on an anthropomorphic phantom
Keywords :
Radon transforms; image reconstruction; inverse problems; medical image processing; single photon emission computed tomography; Moore-Penrose pseudoinverse; Radon transform; SPECT imaging; anthropomorphic phantom; attenuation correction algorithm; attenuation map reconstruction; brain imaging; cardiac imaging; chest phantom; emission projections; ill-posed problem; linear attenuation; lung regions; physically relevant solution; quantitative SPECT; spinal column; transmission measurements; uniqueness condition; Anthropomorphism; Attenuation; Biomedical imaging; Image reconstruction; Imaging phantoms; Least squares approximation; Nonlinear equations; Optical attenuators; Optical imaging; Tomography;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.652007
