Clinical assessment of geometric distortion for a 0.35T MR‐guided radiotherapy system
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13340
Abstract: Abstract Purpose To estimate the overall spatial distortion on clinical patient images for a 0.35 T MR‐guided radiotherapy system. Methods Ten patients with head‐and‐neck cancer underwent CT and MR simulations with identical immobilization. The MR… read more here.
Keywords: radiotherapy system; distortion; guided radiotherapy; tissue ... See more keywords
Development of a vendor neutral MRI distortion quality assurance workflow
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13735
Abstract: Abstract With the utilization of magnetic resonance (MR) imaging in radiotherapy increasing, routine quality assurance (QA) of these systems is necessary. The assessment of geometric distortion in images used for radiotherapy treatment planning needs to… read more here.
Keywords: quality assurance; geometric distortion; scanner; distortion ... See more keywords
Assessment of MRI image distortion based on 6 consecutive years of annual QAs and measurements on 14 MRI scanners used for radiation therapy
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Applied Clinical Medical Physics"
DOI: 10.1002/acm2.13843
Abstract: Abstract Purpose To determine the magnitude of MRI image distortion based on 6 consecutive years of annual quality assurances/measurements on 14 MRI scanners used for radiation therapy and to provide evidence for the inclusion of… read more here.
Keywords: mri scanners; image distortion; mri image; distortion ... See more keywords
Assessing methods for geometric distortion compensation in 7 T gradient echo functional MRI data
Sign Up to like & getrecommendations! Published in 2021 at "Human Brain Mapping"
DOI: 10.1002/hbm.25540
Abstract: Echo planar imaging (EPI) is widely used in functional and diffusion‐weighted MRI, but suffers from significant geometric distortions in the phase encoding direction caused by inhomogeneities in the static magnetic field (B0). This is a… read more here.
Keywords: distortion compensation; field; distortion; phase encoding ... See more keywords
Distortion of the ligand molecule as a strategy for modulating binding affinity: Further studies involving complexes of jacalin with β‐substituted disaccharides
Sign Up to like & getrecommendations! Published in 2017 at "IUBMB Life"
DOI: 10.1002/iub.1593
Abstract: Crystal structures of jacalin in complex with GlcNAc β‐(1,3) Gal‐β‐OMe and Gal β‐(1,3) Gal‐β‐OMe have been determined. The binding of the ligands to jacalin is similar to that of analogous α‐substituted disaccharides. However, the β‐substituted… read more here.
Keywords: strategy modulating; affinity; distortion; jacalin ... See more keywords
A script‐based method for achieving distortion‐free selected area electron diffraction
Sign Up to like & getrecommendations! Published in 2022 at "Microscopy Research and Technique"
DOI: 10.1002/jemt.24124
Abstract: Electron diffraction patterns obtained on a TEM contain elliptical distortion resulting from column defects. This distortion can be corrected by applying offsets to the objective lens stigmators to cancel distortions occurring further down the column.… read more here.
Keywords: distortion; electron diffraction; diffraction; stigmator values ... See more keywords
Tone injection‐based cancellation technique for nonlinear distortion reduction of modulated signals in BAW resonators
Sign Up to like & getrecommendations! Published in 2020 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.32670
Abstract: A technique for the reduction of third-order intermodulation distortion (IMD3) occurring in bulk acoustic wave (BAW) filters and multiplexers is presented. The method consists of using the intrinsic second-order intermodulation distortion generated by BAW filters… read more here.
Keywords: technique; reduction; tone injection; modulated signals ... See more keywords
Beam distortion due to gold fiducial markers during salvage high‐intensity focused ultrasound in the prostate
Sign Up to like & getrecommendations! Published in 2017 at "Medical Physics"
DOI: 10.1002/mp.12044
Abstract: Purpose: High intensity focused ultrasound (HIFU) provides a non‐invasive salvage treatment option for patients with recurrence after external beam radiation therapy (EBRT). As part of EBRT the prostate is frequently implanted with permanent fiducial markers.… read more here.
Keywords: focus; hifu; fiducial markers; distortion ... See more keywords
Technical Note: Harmonic analysis applied to MR image distortion fields specific to arbitrarily shaped volumes
Sign Up to like & getrecommendations! Published in 2018 at "Medical Physics"
DOI: 10.1002/mp.13000
Abstract: PURPOSE Magnetic resonance imaging is expected to play a more important role in radiation therapy given the recent developments in MR-guided technologies. MR images need to consistently show high spatial accuracy to facilitate RT-specific tasks… read more here.
Keywords: image; analysis; harmonic analysis; distortion ... See more keywords
Mesh Distortion Insensitive and Locking-free Petrov-Galerkin low-order EAS Elements for Linear Elasticity
Sign Up to like & getrecommendations! Published in 2021 at "International Journal for Numerical Methods in Engineering"
DOI: 10.1002/nme.6817
Abstract: One of the most successful mixed finite element methods in solid mechanics is the enhanced assumed strain (EAS) method developed by Simo and Rifai in 1990. However, one major drawback of EAS elements is the… read more here.
Keywords: order; eas elements; distortion; petrov galerkin ... See more keywords
Detection of abnormal behavior in narrow scene with perspective distortion
Sign Up to like & getrecommendations! Published in 2018 at "Machine Vision and Applications"
DOI: 10.1007/s00138-018-0970-7
Abstract: Automatically and efficiently detecting abnormal events that occur in dynamic surveillance video is one of the important tasks in real-time video streaming analysis. However, in some typical application scenarios with narrow areas, the perspective distortion… read more here.
Keywords: perspective distortion; distortion; abnormal behavior; detection abnormal ... See more keywords