Clinical Utility of SPECT Neuroimaging in the Diagnosis and Treatment of Traumatic Brain Injury: A Systematic Review
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{"title"=>"Clinical utility of SPECT neuroimaging in the diagnosis and treatment of traumatic brain injury: A systematic review", "type"=>"generic", "authors"=>[{"first_name"=>"Cyrus A.", "last_name"=>"Raji", "scopus_author_id"=>"24390928100"}, {"first_name"=>"Robert", "last_name"=>"Tarzwell", "scopus_author_id"=>"8839388900"}, {"first_name"=>"Dan", "last_name"=>"Pavel", "scopus_author_id"=>"57197267359"}, {"first_name"=>"Howard", "last_name"=>"Schneider", "scopus_author_id"=>"56114489700"}, {"first_name"=>"Michael", "last_name"=>"Uszler", "scopus_author_id"=>"56115269100"}, {"first_name"=>"John", "last_name"=>"Thornton", "scopus_author_id"=>"56114700700"}, {"first_name"=>"Muriel", "last_name"=>"Van Lierop", "scopus_author_id"=>"56115430900"}, {"first_name"=>"Phil", "last_name"=>"Cohen", "scopus_author_id"=>"56114521200"}, {"first_name"=>"Daniel G.", "last_name"=>"Amen", "scopus_author_id"=>"6604058523"}, {"first_name"=>"Theodore", "last_name"=>"Henderson", "scopus_author_id"=>"55343517100"}], "year"=>2014, "source"=>"PLoS ONE", "identifiers"=>{"pmid"=>"24646878", "doi"=>"10.1371/journal.pone.0091088", "sgr"=>"84898603414", "isbn"=>"EN :1932-6203", "scopus"=>"2-s2.0-84898603414", "issn"=>"19326203", "pui"=>"372838746"}, "id"=>"d7475333-56c2-3651-b032-14b989c2239f", "abstract"=>"PURPOSE: This systematic review evaluated the clinical utility of single photon emission computed tomography (SPECT) in traumatic brain injury (TBI).\\n\\nMETHODS: After defining a PICO Statement (Population, Intervention, Comparison and Outcome Statement), PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) criteria were applied to identify 1600 articles. After screening, 374 articles were eligible for review. Inclusion for review was focus on SPECT in the setting of mild, moderate, or severe TBI with cerebral lobar specificity of SPECT findings. Other inclusion criteria were comparison modalities in the same subjects and articles in English. Foreign language articles, SPECT studies that did not include comparison modalities, and case reports were not included for review.\\n\\nRESULTS: We identified 19 longitudinal and 52 cross-sectional studies meeting inclusion criteria. Three longitudinal studies examined diagnostic predictive value. The first showed positive predictive value increases from initial SPECT scan shortly after trauma to one year follow up scans, from 59% to 95%. Subsequent work replicated these results in a larger cohort. Longitudinal and cross sectional studies demonstrated SPECT lesion localization not detected by CT or MRI. The most commonly abnormal regions revealed by SPECT in cross-sectional studies were frontal (94%) and temporal (77%) lobes. SPECT was found to outperform both CT and MRI in both acute and chronic imaging of TBI, particularly mild TBI. It was also found to have a near 100% negative predictive value.\\n\\nCONCLUSIONS: This review demonstrates Level IIA evidence (at least one non-randomized controlled trial) for the value of SPECT in TBI. Given its advantages over CT and MRI in the detection of mild TBI in numerous studies of adequate quality, and given its excellent negative predictive value, it may be an important second test in settings where CT or MRI are negative after a closed head injury with post-injury neurological or psychiatric symptoms.", "link"=>"http://www.mendeley.com/research/clinical-utility-spect-neuroimaging-diagnosis-treatment-traumatic-brain-injury-systematic-review", "reader_count"=>67, "reader_count_by_academic_status"=>{"Unspecified"=>4, "Professor > Associate Professor"=>5, "Librarian"=>3, "Student > Doctoral Student"=>12, "Researcher"=>11, "Student > Ph. D. Student"=>9, "Student > Postgraduate"=>2, "Other"=>6, "Student > Master"=>11, "Student > Bachelor"=>2, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>4, "Professor > Associate Professor"=>5, "Librarian"=>3, "Student > Doctoral Student"=>12, "Researcher"=>11, "Student > Ph. D. Student"=>9, "Student > Postgraduate"=>2, "Other"=>6, "Student > Master"=>11, "Student > Bachelor"=>2, "Lecturer"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>3, "Unspecified"=>6, "Nursing and Health Professions"=>3, "Biochemistry, Genetics and Molecular Biology"=>2, "Materials Science"=>1, "Medicine and Dentistry"=>22, "Agricultural and Biological Sciences"=>9, "Neuroscience"=>3, "Sports and Recreations"=>1, "Psychology"=>12, "Social Sciences"=>4, "Computer Science"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>3}, "Materials Science"=>{"Materials Science"=>1}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>22}, "Neuroscience"=>{"Neuroscience"=>3}, "Social Sciences"=>{"Social Sciences"=>4}, "Sports and Recreations"=>{"Sports and Recreations"=>1}, "Psychology"=>{"Psychology"=>12}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>9}, "Computer Science"=>{"Computer Science"=>1}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>3}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>2}, "Unspecified"=>{"Unspecified"=>6}}, "reader_count_by_country"=>{"Republic of Singapore"=>1, "United States"=>2, "Japan"=>1, "Australia"=>1, "Switzerland"=>1}, "group_count"=>5}

Scopus | Further Information

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  • {"files"=>["https://ndownloader.figshare.com/files/1426973"], "description"=>"<p>The second column describes each of these aspects for the current study.</p>", "links"=>[], "tags"=>["Clinical research design", "Systematic reviews", "Mental health", "psychiatry", "Neuropsychiatric disorders", "neurology", "Head injury", "neuroimaging", "Public health", "preventive medicine", "Socioeconomic aspects of health", "radiology", "Nuclear medicine", "SPECT imaging", "describes", "components", "pico"], "article_id"=>967428, "categories"=>["Medicine"], "users"=>["Cyrus A. Raji", "Robert Tarzwell", "Dan Pavel", "Howard Schneider", "Michael Uszler", "John Thornton", "Muriel van Lierop", "Phil Cohen", "Daniel G. Amen", "Theodore Henderson"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0091088.g001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_This_figure_describes_the_different_components_of_a_PICO_statement_and_they_are_Patient_Intervention_Comparison_and_Outcome_/967428", "title"=>"This figure describes the different components of a PICO statement and they are Patient, Intervention, Comparison, and Outcome.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-03-19 03:37:52"}
  • {"files"=>["https://ndownloader.figshare.com/files/1426974"], "description"=>"<p>This figure outlines a flowchart of article selection in this study from the initial 1600 that were identified to the final 71 manuscripts that were included in the systematic review.</p>", "links"=>[], "tags"=>["Clinical research design", "Systematic reviews", "Mental health", "psychiatry", "Neuropsychiatric disorders", "neurology", "Head injury", "neuroimaging", "Public health", "preventive medicine", "Socioeconomic aspects of health", "radiology", "Nuclear medicine", "SPECT imaging", "outlines", "flowchart", "1600", "71", "manuscripts", "included", "systematic"], "article_id"=>967429, "categories"=>["Medicine"], "users"=>["Cyrus A. Raji", "Robert Tarzwell", "Dan Pavel", "Howard Schneider", "Michael Uszler", "John Thornton", "Muriel van Lierop", "Phil Cohen", "Daniel G. Amen", "Theodore Henderson"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0091088.g002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_This_figure_outlines_a_flowchart_of_article_selection_in_this_study_from_the_initial_1600_that_were_identified_to_the_final_71_manuscripts_that_were_included_in_the_systematic_review_/967429", "title"=>"This figure outlines a flowchart of article selection in this study from the initial 1600 that were identified to the final 71 manuscripts that were included in the systematic review.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-03-19 03:37:52"}
  • {"files"=>["https://ndownloader.figshare.com/files/1426975"], "description"=>"<p>This table describes a summary of cross sectional studies included in this systematic review and include columns on sample size, lobar distribution, relative lesion identification on SPECT compared to other modalities, when SPECT imaging took place, and classification of TBI. Paper citations are integrated into the table.</p>", "links"=>[], "tags"=>["Clinical research design", "Systematic reviews", "Mental health", "psychiatry", "Neuropsychiatric disorders", "neurology", "Head injury", "neuroimaging", "Public health", "preventive medicine", "Socioeconomic aspects of health", "radiology", "Nuclear medicine", "SPECT imaging", "sectional"], "article_id"=>967430, "categories"=>["Medicine"], "users"=>["Cyrus A. Raji", "Robert Tarzwell", "Dan Pavel", "Howard Schneider", "Michael Uszler", "John Thornton", "Muriel van Lierop", "Phil Cohen", "Daniel G. Amen", "Theodore Henderson"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0091088.t002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Summary_of_Cross_Sectional_Studies_/967430", "title"=>"Summary of Cross Sectional Studies.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-03-19 03:37:52"}
  • {"files"=>["https://ndownloader.figshare.com/files/1426976"], "description"=>"<p>This table describes a summary of longitudinal and intervention trials included in this systematic review. Underlined first authored names denote intervention studies. The column on Lesion Localization denotes lobar distributions of SPECT abnormalities described in the evaluated articles with F = Frontal lobe, T = temporal lobe, P = Parietal lobe, O = Occipital lobe, and C = cerebellum. The (Y) denotes a yes to answer the question if a given evaluated paper described abnormalities on SPECT not visualized or described on comparison modality imaging. The column marked NOS denotes the Newcastle-Ottawa Scale score assigned for each longitudinal study or intervention article. Paper citations are integrated into the table.</p>", "links"=>[], "tags"=>["Clinical research design", "Systematic reviews", "Mental health", "psychiatry", "Neuropsychiatric disorders", "neurology", "Head injury", "neuroimaging", "Public health", "preventive medicine", "Socioeconomic aspects of health", "radiology", "Nuclear medicine", "SPECT imaging", "longitudinal"], "article_id"=>967431, "categories"=>["Medicine"], "users"=>["Cyrus A. Raji", "Robert Tarzwell", "Dan Pavel", "Howard Schneider", "Michael Uszler", "John Thornton", "Muriel van Lierop", "Phil Cohen", "Daniel G. Amen", "Theodore Henderson"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0091088.t001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Summary_of_Longitudinal_and_Intervention_Trials_Underline_8202_8202_Intervention_/967431", "title"=>"Summary of Longitudinal and Intervention Trials. Underline = Intervention.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-03-19 03:37:52"}
  • {"files"=>["https://ndownloader.figshare.com/files/1426977"], "description"=>"<div><p>Purpose</p><p>This systematic review evaluated the clinical utility of single photon emission computed tomography (SPECT) in traumatic brain injury (TBI).</p><p>Methods</p><p>After defining a PICO Statement (Population, Intervention, Comparison and Outcome Statement), PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) criteria were applied to identify 1600 articles. After screening, 374 articles were eligible for review. Inclusion for review was focus on SPECT in the setting of mild, moderate, or severe TBI with cerebral lobar specificity of SPECT findings. Other inclusion criteria were comparison modalities in the same subjects and articles in English. Foreign language articles, SPECT studies that did not include comparison modalities, and case reports were not included for review.</p><p>Results</p><p>We identified 19 longitudinal and 52 cross-sectional studies meeting inclusion criteria. Three longitudinal studies examined diagnostic predictive value. The first showed positive predictive value increases from initial SPECT scan shortly after trauma to one year follow up scans, from 59% to 95%. Subsequent work replicated these results in a larger cohort. Longitudinal and cross sectional studies demonstrated SPECT lesion localization not detected by CT or MRI. The most commonly abnormal regions revealed by SPECT in cross-sectional studies were frontal (94%) and temporal (77%) lobes. SPECT was found to outperform both CT and MRI in both acute and chronic imaging of TBI, particularly mild TBI. It was also found to have a near 100% negative predictive value.</p><p>Conclusions</p><p>This review demonstrates Level IIA evidence (at least one non-randomized controlled trial) for the value of SPECT in TBI. Given its advantages over CT and MRI in the detection of mild TBI in numerous studies of adequate quality, and given its excellent negative predictive value, it may be an important second test in settings where CT or MRI are negative after a closed head injury with post-injury neurological or psychiatric symptoms.</p></div>", "links"=>[], "tags"=>["Clinical research design", "Systematic reviews", "Mental health", "psychiatry", "Neuropsychiatric disorders", "neurology", "Head injury", "neuroimaging", "Public health", "preventive medicine", "Socioeconomic aspects of health", "radiology", "Nuclear medicine", "SPECT imaging", "spect", "traumatic", "systematic"], "article_id"=>967432, "categories"=>["Medicine"], "users"=>["Cyrus A. Raji", "Robert Tarzwell", "Dan Pavel", "Howard Schneider", "Michael Uszler", "John Thornton", "Muriel van Lierop", "Phil Cohen", "Daniel G. Amen", "Theodore Henderson"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0091088"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Clinical_Utility_of_SPECT_Neuroimaging_in_the_Diagnosis_and_Treatment_of_Traumatic_Brain_Injury_A_Systematic_Review_/967432", "title"=>"Clinical Utility of SPECT Neuroimaging in the Diagnosis and Treatment of Traumatic Brain Injury: A Systematic Review", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-03-19 03:37:52"}

PMC Usage Stats | Further Information

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  • {"unique-ip"=>"94", "full-text"=>"101", "pdf"=>"271", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"15", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2014", "month"=>"4"}
  • {"unique-ip"=>"55", "full-text"=>"81", "pdf"=>"30", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"4"}
  • {"unique-ip"=>"63", "full-text"=>"80", "pdf"=>"23", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2015", "month"=>"5"}
  • {"unique-ip"=>"72", "full-text"=>"117", "pdf"=>"38", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2015", "month"=>"6"}
  • {"unique-ip"=>"59", "full-text"=>"92", "pdf"=>"30", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"7"}
  • {"unique-ip"=>"50", "full-text"=>"79", "pdf"=>"24", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"3"}
  • {"unique-ip"=>"56", "full-text"=>"80", "pdf"=>"23", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2015", "month"=>"2"}
  • {"unique-ip"=>"66", "full-text"=>"111", "pdf"=>"30", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"8"}
  • {"unique-ip"=>"75", "full-text"=>"87", "pdf"=>"17", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"9"}
  • {"unique-ip"=>"80", "full-text"=>"81", "pdf"=>"30", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2015", "month"=>"10"}
  • {"unique-ip"=>"41", "full-text"=>"47", "pdf"=>"22", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"7"}
  • {"unique-ip"=>"41", "full-text"=>"44", "pdf"=>"20", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"10", "supp-data"=>"0", "cited-by"=>"4", "year"=>"2014", "month"=>"8"}
  • {"unique-ip"=>"26", "full-text"=>"36", "pdf"=>"14", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"9"}
  • {"unique-ip"=>"38", "full-text"=>"37", "pdf"=>"18", "abstract"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2014", "month"=>"10"}
  • {"unique-ip"=>"79", "full-text"=>"93", "pdf"=>"23", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"2"}
  • {"unique-ip"=>"39", "full-text"=>"39", "pdf"=>"15", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"1", "year"=>"2014", "month"=>"11"}
  • {"unique-ip"=>"41", "full-text"=>"45", "pdf"=>"20", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2014", "month"=>"12"}
  • {"unique-ip"=>"71", "full-text"=>"164", "pdf"=>"45", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2015", "month"=>"1"}
  • {"unique-ip"=>"84", "full-text"=>"102", "pdf"=>"23", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"11"}
  • {"unique-ip"=>"81", "full-text"=>"93", "pdf"=>"30", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"12"}
  • {"unique-ip"=>"94", "full-text"=>"105", "pdf"=>"21", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2016", "month"=>"1"}
  • {"unique-ip"=>"85", "full-text"=>"94", "pdf"=>"37", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"8", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"3"}
  • {"unique-ip"=>"66", "full-text"=>"76", "pdf"=>"15", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"4"}
  • {"unique-ip"=>"68", "full-text"=>"79", "pdf"=>"18", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"5"}
  • {"unique-ip"=>"98", "full-text"=>"105", "pdf"=>"30", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2016", "month"=>"6"}
  • {"unique-ip"=>"84", "full-text"=>"95", "pdf"=>"16", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"7"}
  • {"unique-ip"=>"84", "full-text"=>"95", "pdf"=>"20", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"10", "supp-data"=>"2", "cited-by"=>"1", "year"=>"2016", "month"=>"8"}
  • {"unique-ip"=>"99", "full-text"=>"115", "pdf"=>"14", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"1", "cited-by"=>"1", "year"=>"2016", "month"=>"9"}
  • {"unique-ip"=>"58", "full-text"=>"63", "pdf"=>"11", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"10"}
  • {"unique-ip"=>"86", "full-text"=>"109", "pdf"=>"18", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"11"}
  • {"unique-ip"=>"119", "full-text"=>"122", "pdf"=>"27", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"1", "cited-by"=>"3", "year"=>"2016", "month"=>"12"}
  • {"unique-ip"=>"105", "full-text"=>"121", "pdf"=>"18", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"1"}
  • {"unique-ip"=>"96", "full-text"=>"115", "pdf"=>"22", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"2"}
  • {"unique-ip"=>"131", "full-text"=>"168", "pdf"=>"20", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2017", "month"=>"3"}
  • {"unique-ip"=>"119", "full-text"=>"143", "pdf"=>"18", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"4"}
  • {"unique-ip"=>"126", "full-text"=>"139", "pdf"=>"13", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"5"}
  • {"unique-ip"=>"135", "full-text"=>"151", "pdf"=>"26", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"6", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2017", "month"=>"6"}
  • {"unique-ip"=>"168", "full-text"=>"190", "pdf"=>"26", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2017", "month"=>"7"}
  • {"unique-ip"=>"139", "full-text"=>"147", "pdf"=>"13", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"6", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2017", "month"=>"8"}
  • {"unique-ip"=>"125", "full-text"=>"140", "pdf"=>"16", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2017", "month"=>"9"}
  • {"unique-ip"=>"166", "full-text"=>"190", "pdf"=>"21", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"10"}
  • {"unique-ip"=>"161", "full-text"=>"185", "pdf"=>"14", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2017", "month"=>"11"}
  • {"unique-ip"=>"138", "full-text"=>"152", "pdf"=>"12", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2017", "month"=>"12"}
  • {"unique-ip"=>"121", "full-text"=>"148", "pdf"=>"16", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"10", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2018", "month"=>"1"}
  • {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"2"}
  • {"unique-ip"=>"173", "full-text"=>"201", "pdf"=>"18", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2018", "month"=>"3"}
  • {"unique-ip"=>"110", "full-text"=>"125", "pdf"=>"16", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"9", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"1"}
  • {"unique-ip"=>"138", "full-text"=>"156", "pdf"=>"19", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2018", "month"=>"4"}
  • {"unique-ip"=>"121", "full-text"=>"137", "pdf"=>"15", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"6", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"5"}
  • {"unique-ip"=>"91", "full-text"=>"106", "pdf"=>"11", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"12"}
  • {"unique-ip"=>"151", "full-text"=>"160", "pdf"=>"25", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"13", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2018", "month"=>"6"}
  • {"unique-ip"=>"124", "full-text"=>"146", "pdf"=>"14", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2018", "month"=>"7"}
  • {"unique-ip"=>"124", "full-text"=>"134", "pdf"=>"17", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2018", "month"=>"8"}
  • {"unique-ip"=>"170", "full-text"=>"194", "pdf"=>"21", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"10"}
  • {"unique-ip"=>"137", "full-text"=>"140", "pdf"=>"20", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"6", "supp-data"=>"1", "cited-by"=>"1", "year"=>"2018", "month"=>"11"}
  • {"unique-ip"=>"158", "full-text"=>"176", "pdf"=>"23", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"9"}
  • {"unique-ip"=>"121", "full-text"=>"141", "pdf"=>"14", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"2"}
  • {"unique-ip"=>"109", "full-text"=>"124", "pdf"=>"18", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"3"}
  • {"unique-ip"=>"113", "full-text"=>"129", "pdf"=>"22", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"1", "cited-by"=>"2", "year"=>"2019", "month"=>"4"}
  • {"unique-ip"=>"106", "full-text"=>"118", "pdf"=>"10", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"6", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"5"}
  • {"unique-ip"=>"100", "full-text"=>"111", "pdf"=>"22", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"11", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"8"}
  • {"unique-ip"=>"119", "full-text"=>"155", "pdf"=>"10", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2019", "month"=>"9"}

Relative Metric

{"start_date"=>"2014-01-01T00:00:00Z", "end_date"=>"2014-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Biology and life sciences/Neuroscience", "average_usage"=>[289]}, {"subject_area"=>"/Medicine and health sciences/Critical care and emergency medicine", "average_usage"=>[245]}, {"subject_area"=>"/Medicine and health sciences/Diagnostic medicine", "average_usage"=>[257]}, {"subject_area"=>"/Medicine and health sciences/Radiology and imaging", "average_usage"=>[246]}]}
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