Title :
FPGA Implementation of EM Algorithm for 3D CT Reconstruction
Author :
Young-kyu Choi ; Cong, Jason ; Di Wu
Author_Institution :
Comput. Sci. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA
Abstract :
Although the expectation maximization (EM)based 3D computed tomography (CT) reconstruction algorithm lowers radiation exposure, its long execution time hinders practical usage. To accelerate this process, we introduce a novel external memory bandwidth reduction strategy by reusing both the sinogram and the voxel intensity. Also, a customized computing engine based on field-programmable gate array (FPGA) is presented to increase the effective memory bandwidth. Experiments on actual patient data show that 85X speedup can be achieved over single-threaded CPU.
Keywords :
computerised tomography; expectation-maximisation algorithm; field programmable gate arrays; image reconstruction; medical image processing; ray tracing; 3D CT reconstruction; EM algorithm; FPGA implementation; customized computing engine; execution time; expectation maximization based 3D computed reconstruction algorithm; external memory bandwidth reduction strategy; field-programmable gate array; patient data; radiation exposure reduction; sinogram; voxel intensity; Bandwidth; Computed tomography; Computer architecture; Field programmable gate arrays; Graphics processing units; Image reconstruction; Random access memory; computed tomography; customized architecture; data reuse; field-programmable gate array; ray tracing;
Conference_Titel :
Field-Programmable Custom Computing Machines (FCCM), 2014 IEEE 22nd Annual International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4799-5110-9
DOI :
10.1109/FCCM.2014.48
