Metal Artifact Reduction Software Used With Abdominopelvic Dual-Energy CT of Patients With Metal Hip Prostheses: Assessment of Image Quality and Clinical Feasibility

2014 ◽  
Vol 203 (4) ◽  
pp. 788-795 ◽  
Author(s):  
Seung Chol Han ◽  
Yong Eun Chung ◽  
Young Han Lee ◽  
Kwan Kyu Park ◽  
Myeong Jin Kim ◽  
...  
Keyword(s):  
Image Quality ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Hip Prostheses

Reduction of metal artifacts from unilateral hip arthroplasty on dual-energy CT with metal artifact reduction software

2017 ◽  
Vol 59 (7) ◽  
pp. 853-860 ◽  
Author(s):  
Dong Yue ◽  
Cheng Fan Rong ◽  
Cai Ning ◽  
Hu Liang ◽  
Liu Ai Lian ◽  
...  
Keyword(s):  
Image Quality ◽  
Hip Arthroplasty ◽  
Dual Energy ◽  
Observer Agreement ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Metal Artifacts ◽  
Pelvic Organs

Background The evaluation of hip arthroplasty is a challenge in computed tomography (CT). The virtual monochromatic spectral (VMS) images with metal artifact reduction software (MARs) in spectral CT can reduce the artifacts and improve the image quality. Purpose To evaluate the effects of VMS images and MARs for metal artifact reduction in patients with unilateral hip arthroplasty. Material and Methods Thirty-five patients underwent dual-energy CT. Four sets of VMS images without MARs and four sets of VMS images with MARs were obtained. Artifact index (AI), CT number, and SD value were assessed at the periprosthetic region and the pelvic organs. The scores of two observers for different images and the inter-observer agreement were evaluated. Results The AIs in 120 and 140 keV images were significantly lower than those in 80 and 100 keV images. The AIs of the periprosthetic region in VMS images with MARs were significantly lower than those in VMS images without MARs, while the AIs of pelvic organs were not significantly different. VMS images with MARs improved the accuracy of CT numbers for the periprosthetic region. The inter-observer agreements were good for all the images. VMS images with MARs at 120 and 140 keV had higher subjective scores and could improve the image quality, leading to reliable diagnosis of prosthesis-related problems. Conclusion VMS images with MARs at 120 and 140 keV could significantly reduce the artifacts from hip arthroplasty and improve the image quality at the periprosthetic region but had no obvious advantage for pelvic organs.

Dual-energy CT with virtual monochromatic images and metal artifact reduction software for reducing metallic dental artifacts

2017 ◽  
Vol 58 (11) ◽  
pp. 1312-1319 ◽  
Author(s):  
Jihoon Cha ◽  
Hyung-Jin Kim ◽  
Sung Tae Kim ◽  
Yi Kyung Kim ◽  
Ha Youn Kim ◽  
...  
Keyword(s):  
Image Quality ◽  
Head And Neck ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Monochromatic Imaging ◽  
Dental Prostheses ◽  
Ct Data

Background Metallic dental prostheses may degrade image quality on head and neck computed tomography (CT). However, there is little information available on the use of dual-energy CT (DECT) and metal artifact reduction software (MARS) in the head and neck regions to reduce metallic dental artifacts. Purpose To assess the usefulness of DECT with virtual monochromatic imaging and MARS to reduce metallic dental artifacts. Material and Methods DECT was performed using fast kilovoltage (kV)-switching between 80-kV and 140-kV in 20 patients with metallic dental prostheses. CT data were reconstructed with and without MARS, and with synthesized monochromatic energy in the range of 40–140-kiloelectron volt (keV). For quantitative analysis, the artifact index of the tongue, buccal, and parotid areas was calculated for each scan. For qualitative analysis, two radiologists evaluated 70-keV and 100-keV images with and without MARS for tongue, buccal, parotid areas, and metallic denture. The locations and characteristics of the MARS-related artifacts, if any, were also recorded. Results DECT with MARS markedly reduced metallic dental artifacts and improved image quality in the buccal area ( P < 0.001) and the tongue ( P < 0.001), but not in the parotid area. The margin and internal architecture of the metallic dentures were more clearly delineated with MARS ( P < 0.001) and in the higher-energy images than in the lower-energy images ( P = 0.042). MARS-related artifacts most commonly occurred in the deep center of the neck. Conclusion DECT with MARS can reduce metallic dental artifacts and improve delineation of the metallic prosthesis and periprosthetic region.

Impact of metal artifact reduction software on image quality of gemstone spectral imaging dual-energy cerebral CT angiography after intracranial aneurysm clipping

2017 ◽  
Vol 59 (9) ◽  
pp. 845-852 ◽  
Author(s):  
Vincent Dunet ◽  
Martine Bernasconi ◽  
Steven David Hajdu ◽  
Reto Antoine Meuli ◽  
Roy Thomas Daniel ◽  
...  
Keyword(s):  
Image Quality ◽  
Intracranial Aneurysm ◽  
Dual Energy ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Aneurysm Clipping ◽  
Gemstone Spectral Imaging ◽  
Cerebral Ct Angiography

scholarly journals Metal artifact reduction by monoenergetic extrapolation of dual-energy CT in patients with metallic implants

2019 ◽  
Vol 27 (2) ◽  
pp. 230949901985117 ◽  
Author(s):  
Ka Yin Gregory Lee ◽  
Hei Man Joyce Cheng ◽  
Chi Yeung Chu ◽  
Chi Wai Annie Tam ◽  
Wai Kuen Kan
Keyword(s):  
Dual Energy ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Metallic Implants ◽  
Monoenergetic Extrapolation

Reduction of Metal Artifact with Dual-Energy CT: Virtual Monospectral Imaging with Fast Kilovoltage Switching and Metal Artifact Reduction Software

2015 ◽  
Vol 19 (05) ◽  
pp. 446-455 ◽  
Author(s):  
Jean-Michel Sverzut ◽  
Raphaël Campagna ◽  
Henri Guerini ◽  
Antoine Feydy ◽  
Jean-Luc Drapé ◽  
...  
Keyword(s):  
Dual Energy ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction

Metal Artifact Reduction in Virtual Monoenergetic Spectral Dual-Energy CT of Patients With Metallic Orthopedic Implants in the Distal Radius

2018 ◽  
Vol 211 (5) ◽  
pp. 1083-1091 ◽  
Author(s):  
Hye Jin Yoo ◽  
Sung Hwan Hong ◽  
Bo Mi Chung ◽  
Sun Jeong Moon ◽  
Ja-Young Choi ◽  
...  
Keyword(s):  
Distal Radius ◽  
Orthopedic Implants ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction

TH-D-332-01: The Use of Dual-Energy CT Images for Monte Carlo Treatment Planning: Material Extraction and Metal Artifact Reduction

2008 ◽  
Vol 35 (6Part27) ◽  
pp. 2990-2990
Author(s):  
M Bazalova ◽  
L Beaulieu ◽  
J Carrier ◽  
E Vigneault ◽  
F Verhaegen
Keyword(s):  
Monte Carlo ◽  
Treatment Planning ◽  
Ct Images ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction ◽  
Material Extraction

Complementary contrast media for metal artifact reduction in dual-energy CT

2015 ◽  
Author(s):  
Jack W. Lambert ◽  
Peter M. Edic ◽  
Paul Fitzgerald ◽  
Andrew S. Torres ◽  
Benjamin M. Yeh
Keyword(s):  
Contrast Media ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Artifact Reduction ◽  
Metal Artifact ◽  
Metal Artifact Reduction
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