(a) Box plot illustrating the absolute reduction of artifact size in comparison to LAVA-Flex (mm2).
(b) Box plot illustrating the relative reduction of artifact size in comparison to LAVA-Flex.
Figure 1 Box plot illustrating the absolute and relative reduction of artifact size in comparison to LAVA-Flex.
Absolute and relative reduction of artifact sizes were calculated for T1-FSE, MAVRIC SL, and MAVRIC-fast sequences and compared using the Wilcoxon signed-rank test.
Only one patient with small number of metal dental hardware was acquired with a jaw spacer installed, showing a reduction of artifact volume by 49.3% when reconstructed with the dedicated iterative metal artifact reduction algorithm (3.4 ± 6.7 ml).
The size of signal voids might not translate into identical signal voids on MR attenuation maps; however, a substantial reduction of artifact size will also generate smaller signal voids on MR attenuation maps.
This reduction of NRT threshold could also be explained by a measurement artifact.
Spectral data are available for all patients imaged with SDCT without a change in clinical workflow, permitting evaluation of incidentally discovered findings and reduction of artifacts.
A reliable estimation can be achieved by means of experiments and numerical simulations aimed at quantifying a realistic noise level, with emphasis on reduction of artifacts due to data acquisition, registration and modeling.
With the improvement of three-dimensional reconstruction techniques [ 4– 7] and reduction of artifacts, the concept of applying flat detectors for X-ray computed tomography had been investigated for several years.
Overall, all Gaussian-weighted sampling patterns showed increased spatial resolution and SNR, 4(c), and 4(d)) with reduction of artifacts (indicated by yellow arrow in Figure 2(a)) for all phase-cycled bSSFP data, while downsampling with only k-space low-frequency information showed increase of artifacts).
