Quantitative Comparison of Commercial and Non-Commercial Metal Artifact Reduction Techniques in Computed Tomography
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{"title"=>"Quantitative Comparison of Commercial and Non-Commercial Metal Artifact Reduction Techniques in Computed Tomography", "type"=>"journal", "authors"=>[{"first_name"=>"Dirk", "last_name"=>"Wagenaar"}, {"first_name"=>"Emiel R.", "last_name"=>"van der Graaf"}, {"first_name"=>"Arjen", "last_name"=>"van der Schaaf"}, {"first_name"=>"Marcel J. W.", "last_name"=>"Greuter"}], "year"=>2015, "source"=>"PLOS ONE", "identifiers"=>{"doi"=>"10.1371/journal.pone.0127932", "sgr"=>"84934948195", "issn"=>"1932-6203", "pui"=>"604923723", "pmid"=>"26030821"}, "id"=>"cd40d757-17af-398e-9272-be616f67c85c", "abstract"=>"OBJECTIVES: Typical streak artifacts known as metal artifacts occur in the presence of strongly attenuating materials in computed tomography (CT). Recently, vendors have started offering metal artifact reduction (MAR) techniques. In addition, a MAR technique called the metal deletion technique (MDT) is freely available and able to reduce metal artifacts using reconstructed images. Although a comparison of the MDT to other MAR techniques exists, a comparison of commercially available MAR techniques is lacking. The aim of this study was therefore to quantify the difference in effectiveness of the currently available MAR techniques of different scanners and the MDT technique.\\n\\nMATERIALS AND METHODS: Three vendors were asked to use their preferential CT scanner for applying their MAR techniques. The scans were performed on a Philips Brilliance ICT 256 (S1), a GE Discovery CT 750 HD (S2) and a Siemens Somatom Definition AS Open (S3). The scans were made using an anthropomorphic head and neck phantom (Kyoto Kagaku, Japan). Three amalgam dental implants were constructed and inserted between the phantom's teeth. The average absolute error (AAE) was calculated for all reconstructions in the proximity of the amalgam implants.\\n\\nRESULTS: The commercial techniques reduced the AAE by 22.0±1.6%, 16.2±2.6% and 3.3±0.7% for S1 to S3 respectively. After applying the MDT to uncorrected scans of each scanner the AAE was reduced by 26.1±2.3%, 27.9±1.0% and 28.8±0.5% respectively. The difference in efficiency between the commercial techniques and the MDT was statistically significant for S2 (p=0.004) and S3 (p<0.001), but not for S1 (p=0.63).\\n\\nCONCLUSIONS: The effectiveness of MAR differs between vendors. S1 performed slightly better than S2 and both performed better than S3. Furthermore, for our phantom and outcome measure the MDT was more effective than the commercial MAR technique on all scanners.", "link"=>"http://www.mendeley.com/research/quantitative-comparison-commercial-noncommercial-metal-artifact-reduction-techniques-computed-tomogr-1", "reader_count"=>21, "reader_count_by_academic_status"=>{"Researcher"=>7, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>1, "Student > Master"=>3, "Other"=>1, "Student > Bachelor"=>2}, "reader_count_by_user_role"=>{"Researcher"=>7, "Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>6, "Student > Postgraduate"=>1, "Student > Master"=>3, "Other"=>1, "Student > Bachelor"=>2}, "reader_count_by_subject_area"=>{"Unspecified"=>4, "Engineering"=>2, "Mathematics"=>1, "Medicine and Dentistry"=>8, "Agricultural and Biological Sciences"=>1, "Physics and Astronomy"=>5}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>2}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>8}, "Physics and Astronomy"=>{"Physics and Astronomy"=>5}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>1}, "Mathematics"=>{"Mathematics"=>1}, "Unspecified"=>{"Unspecified"=>4}}, "reader_count_by_country"=>{"United States"=>1, "Italy"=>1}, "group_count"=>0}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/2090078"], "description"=>"<p>(a) The AAE between reference scans, for scans without MAR, for scans with the commercial MAR technique and for scans corrected using the MDT software. For S3, MAR2 is displayed. (b) The AAE reduction after the application of both the commercial MAR techniques and the metal deletion technique (MDT). S1: Philips Brilliance ICT 256, S2: GE Discovery CT 750 HD, S3: Siemens Somatom Definition AS Open.</p>", "links"=>[], "tags"=>["S 3", "GE Discovery CT 750 HD", "S 2", "offering metal artifact reduction", "Philips Brilliance ICT 256", "Siemens Somatom Definition AS Open", "aae", "metal artifacts", "metal deletion technique", "MAR technique", "mdt", "MAR techniques", "S 1", "Computed Tomography ObjectivesTypical streak artifacts"], "article_id"=>1432232, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Dirk Wagenaar", "Emiel R. van der Graaf", "Arjen van der Schaaf", "Marcel J. W. Greuter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0127932.g004", "stats"=>{"downloads"=>2, "page_views"=>25, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_average_absolute_error_AAE_with_and_without_different_metal_artifact_reduction_MAR_techniques_/1432232", "title"=>"The average absolute error (AAE) with and without different metal artifact reduction (MAR) techniques.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-01 03:13:36"}
  • {"files"=>["https://ndownloader.figshare.com/files/2090079"], "description"=>"<p>S1: Philips Brilliance ICT 256, S2: GE Discovery CT 750 HD, S3: Siemens Somatom Definition AS Open, O-MAR: Metal Artifact Reduction for Orthopedic Implants, SMAR: Smart Metal Artifact Reduction, MARIS: Metal Artifact Reduction in Image Space.</p><p>* S2 scanned using dual energy. S3 used both a metal artifact reduction technique based on single and on dual energy using a tube voltage of 140/80 kV.</p><p>Scan protocol for the CT scans of the three scanners.</p>", "links"=>[], "tags"=>["S 3", "GE Discovery CT 750 HD", "S 2", "offering metal artifact reduction", "Philips Brilliance ICT 256", "Siemens Somatom Definition AS Open", "aae", "metal artifacts", "metal deletion technique", "MAR technique", "mdt", "MAR techniques", "S 1", "Computed Tomography ObjectivesTypical streak artifacts"], "article_id"=>1432233, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Dirk Wagenaar", "Emiel R. van der Graaf", "Arjen van der Schaaf", "Marcel J. W. Greuter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0127932.t001", "stats"=>{"downloads"=>6, "page_views"=>57, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Scan_protocol_for_the_CT_scans_of_the_three_scanners_/1432233", "title"=>"Scan protocol for the CT scans of the three scanners.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2015-06-01 03:13:36"}
  • {"files"=>["https://ndownloader.figshare.com/files/2090073"], "description"=>"<p>(a) The assembled phantom. (b) The disassembled jaw.</p>", "links"=>[], "tags"=>["S 3", "GE Discovery CT 750 HD", "S 2", "offering metal artifact reduction", "Philips Brilliance ICT 256", "Siemens Somatom Definition AS Open", "aae", "metal artifacts", "metal deletion technique", "MAR technique", "mdt", "MAR techniques", "S 1", "Computed Tomography ObjectivesTypical streak artifacts"], "article_id"=>1432227, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Dirk Wagenaar", "Emiel R. van der Graaf", "Arjen van der Schaaf", "Marcel J. W. Greuter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0127932.g001", "stats"=>{"downloads"=>9, "page_views"=>288, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_Kyoto_Kagaku_PH_47_head_neck_phantom_/1432227", "title"=>"The Kyoto Kagaku PH-47 head/neck phantom.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-01 03:13:36"}
  • {"files"=>["https://ndownloader.figshare.com/files/2090075"], "description"=>"<p>A high error was observed in a 9 mm wide region around the amalgam implants at 0 mm. In addition, a high error was observed at -48 mm and +24 mm which were caused by movement of the tongue and the upperjaw due to the insertion of amalgam implants respectively. S1: Philips Brilliance ICT 256, S2: GE Discovery CT 750 HD, S3: Siemens Somatom Definition AS Open.</p>", "links"=>[], "tags"=>["S 3", "GE Discovery CT 750 HD", "S 2", "offering metal artifact reduction", "Philips Brilliance ICT 256", "Siemens Somatom Definition AS Open", "aae", "metal artifacts", "metal deletion technique", "MAR technique", "mdt", "MAR techniques", "S 1", "Computed Tomography ObjectivesTypical streak artifacts"], "article_id"=>1432229, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Dirk Wagenaar", "Emiel R. van der Graaf", "Arjen van der Schaaf", "Marcel J. W. Greuter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0127932.g002", "stats"=>{"downloads"=>1, "page_views"=>23, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_increase_in_average_absolute_error_AAE_of_all_standard_CT_reconstructions_of_the_phantom_containing_three_amalgam_implants_as_a_function_of_the_position_of_the_slice_/1432229", "title"=>"The increase in average absolute error (AAE) of all standard CT reconstructions of the phantom containing three amalgam implants as a function of the position of the slice.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-01 03:13:36"}
  • {"files"=>["https://ndownloader.figshare.com/files/2090077"], "description"=>"<p>For S3, the reconstruction using MAR2 is displayed. The window and level were set at 400 and 40 respectively. S1: Philips Brilliance ICT 256, S2: GE Discovery CT 750 HD, S3: Siemens Somatom Definition AS Open.</p>", "links"=>[], "tags"=>["S 3", "GE Discovery CT 750 HD", "S 2", "offering metal artifact reduction", "Philips Brilliance ICT 256", "Siemens Somatom Definition AS Open", "aae", "metal artifacts", "metal deletion technique", "MAR technique", "mdt", "MAR techniques", "S 1", "Computed Tomography ObjectivesTypical streak artifacts"], "article_id"=>1432231, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Dirk Wagenaar", "Emiel R. van der Graaf", "Arjen van der Schaaf", "Marcel J. W. Greuter"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0127932.g003", "stats"=>{"downloads"=>2, "page_views"=>21, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_CT_reconstructions_made_with_and_without_metal_implants_and_with_different_MAR_techniques_/1432231", "title"=>"CT reconstructions made with and without metal implants and with different MAR techniques.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-06-01 03:13:36"}

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Relative Metric

{"start_date"=>"2015-01-01T00:00:00Z", "end_date"=>"2015-12-31T00:00:00Z", "subject_areas"=>[]}
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