Clinical Evaluation of Normalized Metal Artifact Reduction in kVCT Using MVCT Prior Images (MVCT-NMAR) for Radiation Therapy Treatment Planning

Single-energy metal artefact reduction with CT for carbon-ion radiation therapy treatment planning

“…These mainly involve manipulating X-ray energies, such as dual-energy acquisition techniques, 5 highenergy X-rays 6,7 and image processing, such as iterative reconstruction methods [8][9][10] or interpolation of metal object. [11][12][13][14][15][16] The majority of image processing approach treats the projections on metal objects which were segmented from sinograms or images as a corrupt or missing data.…”

Metal artifact reduction (MAR) based on two-compartment physical modeling: evaluation in patients with hip implants

“…Besides image interpretation, artifacts from high-density objects represent a severe problem for radiation therapy planning and attenuation correction in positron emission tomography CT (PET-CT) (4)(5)(6)(7).…”

Generation of hybrid sinograms for the recovery of kV‐CT images with metal artifacts for helical tomotherapy

“…The possibility of metal artifact reduction through a combination of kV and MV projection methods has been studied by several researchers. Recently, a normalized MAR (NMAR) method improved with MV-CT prior images was introduced by Paudel et al 33,34 They showed that the use of MV-CT prior images in NMAR significantly reduced several problems associated with the conventional NMAR method, 11 such as the deformation and erosion of structures. In addition, the MV prior image offered the correct CT number of metals in the kV image.…”