Single‐pass metal artifact reduction using a dual‐layer flat panel detector

2021 ◽  
Author(s):  
Linxi Shi ◽  
N. Robert Bennett ◽  
Amy Shiroma ◽  
Mingshan Sun ◽  
Jin Zhang ◽  
...  
Keyword(s):  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Flat Panel ◽  
Single Pass ◽  
Flat Panel Detector

scholarly journals Metal artifact reduction for flat panel detector intravenous CT angiography in patients with intracranial metallic implants after endovascular and surgical treatment

2015 ◽  
Vol 8 (8) ◽  
pp. 824-829 ◽  
Author(s):  
Rastislav Pjontek ◽  
Belgin Önenköprülü ◽  
Bernhard Scholz ◽  
Yiannis Kyriakou ◽  
Gerrit A Schubert ◽  
...  
Keyword(s):  
Image Quality ◽  
Contrast Agent ◽  
Brain Parenchyma ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Flat Panel ◽  
Intravenous Contrast ◽  
Flat Panel Detector ◽  
Metallic Implants

BackgroundFlat panel detector CT angiography with intravenous contrast agent injection (IV CTA) allows high-resolution imaging of cerebrovascular structures. Artifacts caused by metallic implants like platinum coils or clips lead to degradation of image quality and are a significant problem.ObjectiveTo evaluate the influence of a prototype metal artifact reduction (MAR) algorithm on image quality in patients with intracranial metallic implants.MethodsFlat panel detector CT after intravenous application of 80 mL contrast agent was performed with an angiography system (Artis zee; Siemens, Forchheim, Germany) using a 20 s rotation protocol (200° rotation angle, 20 s acquisition time, 496 projections). The data before and after MAR of 26 patients with a total of 34 implants (coils, clips, stents) were independently evaluated by two blinded neuroradiologists.ResultsMAR improved the assessability of the brain parenchyma and small vessels (diameter <1 mm) in the neighborhood of metallic implants and at a distance of 6 cm (p<0.001 each, Wilcoxon test). Furthermore, MAR significantly improved the assessability of parent vessel patency and potential aneurysm remnants (p<0.005 each, McNemar test). MAR, however, did not improve assessability of stented vessels.ConclusionsWhen an intravenous contrast protocol is used, MAR significantly ameliorates the assessability of brain parenchyma, vessels, and treated aneurysms in patients with intracranial coils or clips.

O-031 Metal artifact reduction for C-arm flat panel CT: preliminary results in neurointerventional applications: Abstract O-031 Figure 1

2012 ◽  
Vol 4 (Suppl 1) ◽  
pp. A17.2-A18
Author(s):  
P Chinna Durai ◽  
G Chintalapani ◽  
H Shaltoni ◽  
H Morsi ◽  
M Mawad
Keyword(s):  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Flat Panel ◽  
Preliminary Results ◽  
Flat Panel Ct

MR Imaging with Metal Artifact Reduction to Differentiate between Patients with and without Infected Total Hip Arthroplasty

2018 ◽  
Author(s):  
Benedikt Schwaiger ◽  
Alexandra Gersing ◽  
Daniela Muenzel ◽  
Julia Dangelmaier ◽  
Peter Prodinger ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Mr Imaging ◽  
Hip Arthroplasty ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Total Hip

Study on the usefulness of Metal artifact reduction algorithm and MonoE reconstruction (Dual Layer Detector) overlapping application

2018 ◽  
Vol 20 (2) ◽  
pp. 79-87
Author(s):  
Jang-hun Baek ◽  
Seon-Young Kang ◽  
Jun-Hyub Lee ◽  
Yun-Sang Lee
Keyword(s):  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Reduction Algorithm

Comparison of metal artifact reduction techniques in magnetic resonance imaging of carbon-reinforced PEEK and titanium spinal implants

2021 ◽  
pp. 028418512110290
Author(s):  
Georg Osterhoff ◽  
Florian A Huber ◽  
Laura C Graf ◽  
Ferdinand Erdlen ◽  
Hans-Christoph Pape ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Pedicle Screws ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Signal Loss ◽  
Resonance Imaging ◽  
Spinal Implants ◽  
Titanium Screws

Background Carbon-reinforced PEEK (C-FRP) implants are non-magnetic and have increasingly been used for the fixation of spinal instabilities. Purpose To compare the effect of different metal artifact reduction (MAR) techniques in magnetic resonance imaging (MRI) on titanium and C-FRP spinal implants. Material and Methods Rod-pedicle screw constructs were mounted on ovine cadaver spine specimens and instrumented with either eight titanium pedicle screws or pedicle screws made of C-FRP and marked with an ultrathin titanium shell. MR scans were performed of each configuration on a 3-T scanner. MR sequences included transaxial conventional T1-weighted turbo spin echo (TSE) sequences, T2-weighted TSE, and short-tau inversion recovery (STIR) sequences and two different MAR-techniques: high-bandwidth (HB) and view-angle-tilting (VAT) with slice encoding for metal artifact correction (SEMAC). Metal artifact degree was assessed by qualitative and quantitative measures. Results There was a much stronger effect on artifact reduction with using C-FRP implants compared to using specific MRI MAR-techniques (screw shank: P < 0.001; screw tulip: P < 0.001; rod: P < 0.001). VAT-SEMAC sequences were able to reduce screw-related signal loss artifacts in constructs with titanium screws to a certain degree. Constructs with C-FRP screws showed less artifact-related implant diameter amplification when compared to constructs with titanium screws ( P < 0.001). Conclusion Constructs with C-FRP screws are associated with significantly less artifacts compared to constructs with titanium screws including dedicated MAR techniques. Artifact-reducing sequences are able to reduce implant-related artifacts. This effect is stronger in constructs with titanium screws than in constructs with C-FRP screws.

scholarly journals Metal artifact reduction in computed tomography images based on developed generative adversarial neural network

2021 ◽  
Vol 24 ◽  
pp. 100573
Author(s):  
Goli Khaleghi ◽  
Mohammad Hosntalab ◽  
Mahdi Sadeghi ◽  
Reza Reiazi ◽  
Seied Rabi Mahdavi
Keyword(s):  
Neural Network ◽  
Computed Tomography ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Computed Tomography Images

Novel 3-fold metal artifact reduction method for CT images

2021 ◽  
Vol 70 ◽  
pp. 102967
Author(s):  
Shrinivas. D. Desai
Keyword(s):  
Reduction Method ◽  
Ct Images ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction

scholarly journals Dosimetric impact of using a commercial metal artifact reduction tool in carbon ion therapy in patients with hip prostheses

2021 ◽  
Author(s):  
Jingfang Zhao ◽  
Weiwei Wang ◽  
Kambiz Shahnaz ◽  
Xianwei Wu ◽  
Jingfang Mao ◽  
...  
Keyword(s):  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Carbon Ion Therapy ◽  
Hip Prostheses ◽  
Carbon Ion ◽  
Ion Therapy

Comparative methods for metal artifact reduction in x-ray CT

2014 ◽  
Author(s):  
Mehrsima Abdoli ◽  
Abolfazl Mehranian ◽  
Angeliki Ailianou ◽  
Minerva Becker ◽  
Habib Zaidi
Keyword(s):  
Comparative Methods ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
X Ray
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