3-D maximum a posteriori estimation for single photon emissioncomputed tomography on massively-parallel computers
Miller, M.I.; Butler, C.S.
Medical Imaging, IEEE Transactions on
Volume 12, Issue 3, Sep 1993 Page(s):560 - 565
Digital Object Identifier 10.1109/42.241884
Summary:A fully three-dimensional (3-D) implementation of the maximum a
posteriori (MAP) method for single photon emission computed tomography
(SPECT) is demonstrated. The 3-D reconstruction exhibits a major
increase in resolution when compared to the generation of the series of
separate 2-D slice reconstructions. As has been noted, the iterative EM
algorithm for 2-D reconstruction is highly computational; the 3-D
algorithm is far worse. To accommodate the computational complexity,
previous work in the 2-D arena is extended, and an implementation on the
class of massively parallel processors of the 3-D algorithm is
demonstrated. Using a 16000- (4000-) processor MasPar/DECmpp-Sx machine,
the algorithm is demonstrated to execute at 2.5 (7.8) s/EM-iteration for
the entire 64×64×64 cube of 96 planar measurements obtained
from the Siemens Orbiter rotating camera operating in the
high-resolution mode
View citation and abstract |
Cart
