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A post-processing method for correcting the beam hardening artifacts in fan beam axial computed tomography is presented. The original uncorrected CT image is reconstructed using filtered backprojection algorithm. Image segmentation technique is adopted to exact the high density object from the uncorrected CT image. The original and high density image are reprojected individually. Certain correction...
Katsevich proposed the first theoretically exact reconstruction formula for the spiral cone-beam CT. In this paper, the transaction level modeling of the architecture of a hardware backprojector is proposed using SystemC. Accompanied with this, architecture exploration and performance analysis are performed on the timing model. Finally, with certain case studies, we come to a conclusion that nearly...
Hardware acceleration is widely used in the medical image reconstruction which is computation intensive. Meanwhile, transaction level modeling has many advantages like very fast simulation speed and is really suitable for early architecture modeling and exploration. This paper introduces the transaction level modeling technique into the hardware acceleration for CT medical image reconstruction. Also,...
Katsevich proposed the first theoretically exact reconstruction formula for spiral cone-beam CT which is computation quite intensive. The main bottleneck is that the memory storing the projection data has to be accessed for many times. Given that one single source position s belongs to S different ??-intervals, and the corresponding ??-line contains N voxels, then the projection data at position s...
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