Title :
Direct estimation of dynamic parameters in SPECT tomography
Author :
Hebber, E. ; Oldenburg, D. ; Farnocombe, T. ; Celler, A.
fDate :
12/1/1997 12:00:00 AM
Abstract :
This paper solves the problem of estimating dynamic parameters of SPECT reconstruction directly from the projections. This is done by spanning the dynamic parameters of each pixel with a basis of exponentials. Any time decay system can be modeled in this way. This process leads to a linear Fredholm integral equation of the first kind which is discretized and then solved with conjugate gradient methods. We tested our algorithm by applying it to a numerical phantom and to a simple real phantom
Keywords :
Fredholm integral equations; conjugate gradient methods; image reconstruction; medical image processing; single photon emission computed tomography; SPECT reconstruction; SPECT tomography; conjugate gradient methods; direct estimation; dynamic parameters; exponentials; linear Fredholm integral equation; numerical phantom; pixel; projections; simple real phantom; time decay system; Biological cells; Biological system modeling; Geoscience; Hospitals; Image reconstruction; Imaging phantoms; Integral equations; Oceans; Parameter estimation; Positron emission tomography;
Journal_Title :
Nuclear Science, IEEE Transactions on
