Feasibility of Using Pseudo-Continuous Arterial Spin Labeling Perfusion in a Geriatric Population at 1.5 Tesla
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{"title"=>"Feasibility of Using Pseudo-Continuous Arterial Spin Labeling Perfusion in a Geriatric Population at 1.5 Tesla", "type"=>"journal", "authors"=>[{"first_name"=>"Sigurdur", "last_name"=>"Sigurdsson", "scopus_author_id"=>"35273710100"}, {"first_name"=>"Lars", "last_name"=>"Forsberg", "scopus_author_id"=>"57196849844"}, {"first_name"=>"Thor", "last_name"=>"Aspelund", "scopus_author_id"=>"8703984700"}, {"first_name"=>"Rob J.", "last_name"=>"Van Der Geest", "scopus_author_id"=>"7005167249"}, {"first_name"=>"Mark A.", "last_name"=>"Van Buchem", "scopus_author_id"=>"7005065927"}, {"first_name"=>"Lenore J.", "last_name"=>"Launer", "scopus_author_id"=>"7006392362"}, {"first_name"=>"Vilmundur", "last_name"=>"Gudnason", "scopus_author_id"=>"56750968900"}, {"first_name"=>"Matthias J.", "last_name"=>"Van Osch", "scopus_author_id"=>"8148402200"}], "year"=>2015, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "scopus"=>"2-s2.0-84956857669", "sgr"=>"84956857669", "pui"=>"607918297", "pmid"=>"26659363", "doi"=>"10.1371/journal.pone.0144743"}, "id"=>"511af733-d52e-3026-8683-49a7ef48c67c", "abstract"=>"OBJECTIVES: To evaluate the feasibility of using pseudo-continuous arterial spin labeling (pCASL) perfusion in a geriatric population at 1.5-Tesla.\\n\\nMATERIALS AND METHODS: In 17 participants (mean age 78.8±1.63 years) we assessed; 1) inter-session repeatability and reliability of resting state perfusion in 27 brain regions; 2) brain activation using finger-tapping as a means to evaluate the ability to detect flow differences; 3) reliability by comparing cerebral blood flow (CBF) with pCASL to CBF with phase contrast (PC-MR).\\n\\nRESULTS: The CBF (mean±standard deviation (SD)) for the whole brain grey matter (GM) was 40.6±8.4 and 41.4±8.7 ml/100g/min for the first and second scan respectively. The within-subject standard deviation (SDw), the repeatability index (RI) and intra-class correlation coefficient (ICC) across the 27 regions ranged from 1.1 to 7.9, 2.2 to 15.5 and 0.35 to 0.98 respectively. For whole brain GM the SDw, RI and ICC were 1.6, 3.2 and 0.96 respectively. The between-subject standard deviation (SDB) was larger than the SDw for all regions. Comparison of CBF at rest and activation on a voxel level showed significantly higher perfusion during finger tapping in the motor- and somatosensory regions. The mean CBF for whole brain GM was 40.6±8.4 ml/100g/min at rest and 42.6±8.6 ml/100g/min during activation. Finally the reliability of pCASL against the reference standard of PC-MR was high (ICC = 0.80). The mean CBF for whole brain measured with PC-MRI was 54.3±10.1 ml/100g/min and 38.3±7.8 ml/100g/min with pCASL.\\n\\nCONCLUSIONS: The results demonstrate moderate to high levels of repeatability and reliability for most brain regions, comparable to what has been reported for younger populations. The performance of pCASL at 1.5-Tesla shows that region-specific perfusion measurements with this technique are feasible in studies of a geriatric population.", "link"=>"http://www.mendeley.com/research/feasibility-using-pseudocontinuous-arterial-spin-labeling-perfusion-geriatric-population-15-tesla", "reader_count"=>16, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Researcher"=>3, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>3, "Student > Postgraduate"=>1, "Student > Master"=>4, "Other"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Researcher"=>3, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>3, "Student > Postgraduate"=>1, "Student > Master"=>4, "Other"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Engineering"=>1, "Nursing and Health Professions"=>1, "Medicine and Dentistry"=>6, "Neuroscience"=>3, "Physics and Astronomy"=>2, "Mathematics"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>1}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>6}, "Neuroscience"=>{"Neuroscience"=>3}, "Physics and Astronomy"=>{"Physics and Astronomy"=>2}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>1}, "Mathematics"=>{"Mathematics"=>1}, "Unspecified"=>{"Unspecified"=>2}}, "reader_count_by_country"=>{"Canada"=>1, "Germany"=>1}, "group_count"=>0}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/2608268"], "description"=>"<p>Bland-Altman plot demonstrating the agreement between the first and second scan at rest for whole brain CBF. Solid mid and upper-lower lines are the mean bias and limits of agreement (1.96 standard deviation), respectively. Y-axis displays mean difference between first and second scan and x-axis the average CBF of the first and second scan.</p>", "links"=>[], "tags"=>["repeatability", "MethodsIn 17 participants", "activation", "brain GM", "27 brain regions", "pcasl", "cbf", "perfusion", "ml", "ri", "sd", "reliability", "1.5 Tesla ObjectivesTo", "deviation", "SDW", "icc", "sdb"], "article_id"=>1624488, "categories"=>["Uncategorised"], "users"=>["Sigurdur Sigurdsson", "Lars Forsberg", "Thor Aspelund", "Rob J. van der Geest", "Mark A. van Buchem", "Lenore J. Launer", "Vilmundur Gudnason", "Matthias J. van Osch"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0144743.g004", "stats"=>{"downloads"=>1, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Agreement_between_scans_at_rest_for_whole_brain_CBF_/1624488", "title"=>"Agreement between scans at rest for whole brain CBF.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-12-17 08:10:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/2608261"], "description"=>"<p>(a) A PC-MRI scan for measuring mean tCBF was prescribed on a PC-MRI sagittal localizer image perpendicular to the carotid arteries at the level of the mid basilar artery. (b) A representative phase image demonstrating the right and left internal carotid arteries (R.ICA and L.ICA) together with the basilar artery (BA).</p>", "links"=>[], "tags"=>["repeatability", "MethodsIn 17 participants", "activation", "brain GM", "27 brain regions", "pcasl", "cbf", "perfusion", "ml", "ri", "sd", "reliability", "1.5 Tesla ObjectivesTo", "deviation", "SDW", "icc", "sdb"], "article_id"=>1624481, "categories"=>["Uncategorised"], "users"=>["Sigurdur Sigurdsson", "Lars Forsberg", "Thor Aspelund", "Rob J. van der Geest", "Mark A. van Buchem", "Lenore J. Launer", "Vilmundur Gudnason", "Matthias J. van Osch"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0144743.g001", "stats"=>{"downloads"=>4, "page_views"=>2, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_PC_MRI_for_quantification_of_total_CBF_/1624481", "title"=>"PC-MRI for quantification of total CBF.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-12-17 08:10:09"}
  • {"files"=>["https://ndownloader.figshare.com/files/2608271"], "description"=>"<p>(a) Average CBF maps of the entire study sample (n = 17) of the first scan at rest (Rest 1), rescan at rest (Rest 2) and at activation by bilateral finger-tapping (activation). (b) Comparison of CBF values at rest and activation by finger-tapping on a voxel level showed significantly higher perfusion during activation in the motor and somatosensory regions at threshold p≤0.01.</p>", "links"=>[], "tags"=>["repeatability", "MethodsIn 17 participants", "activation", "brain GM", "27 brain regions", "pcasl", "cbf", "perfusion", "ml", "ri", "sd", "reliability", "1.5 Tesla ObjectivesTo", "deviation", "SDW", "icc", "sdb"], "article_id"=>1624491, "categories"=>["Uncategorised"], "users"=>["Sigurdur Sigurdsson", "Lars Forsberg", "Thor Aspelund", "Rob J. van der Geest", "Mark A. van Buchem", "Lenore J. Launer", "Vilmundur Gudnason", "Matthias J. van Osch"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0144743.g005", "stats"=>{"downloads"=>1, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_CBF_values_at_rest_and_activation_/1624491", "title"=>"Comparison of CBF values at rest and activation.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-12-17 08:10:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/2608264"], "description"=>"<p>Regional segmentation was done by non-linearly warping an atlas of 56 regions to the T1-weighted image.</p>", "links"=>[], "tags"=>["repeatability", "MethodsIn 17 participants", "activation", "brain GM", "27 brain regions", "pcasl", "cbf", "perfusion", "ml", "ri", "sd", "reliability", "1.5 Tesla ObjectivesTo", "deviation", "SDW", "icc", "sdb"], "article_id"=>1624484, "categories"=>["Uncategorised"], "users"=>["Sigurdur Sigurdsson", "Lars Forsberg", "Thor Aspelund", "Rob J. van der Geest", "Mark A. van Buchem", "Lenore J. Launer", "Vilmundur Gudnason", "Matthias J. van Osch"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0144743.g002", "stats"=>{"downloads"=>1, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Anatomical_atlas_for_regional_segmentation_/1624484", "title"=>"Anatomical atlas for regional segmentation.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-12-17 08:10:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/2608266"], "description"=>"<p>Representative CBF maps of an 80 year old male participant with whole brain CBF 47.6 and 49.5 ml/100g/min for the first and second scan at rest respectively. (a) First row corresponds to first scan at rest and (b) second row to rescan at rest.</p>", "links"=>[], "tags"=>["repeatability", "MethodsIn 17 participants", "activation", "brain GM", "27 brain regions", "pcasl", "cbf", "perfusion", "ml", "ri", "sd", "reliability", "1.5 Tesla ObjectivesTo", "deviation", "SDW", "icc", "sdb"], "article_id"=>1624486, "categories"=>["Uncategorised"], "users"=>["Sigurdur Sigurdsson", "Lars Forsberg", "Thor Aspelund", "Rob J. van der Geest", "Mark A. van Buchem", "Lenore J. Launer", "Vilmundur Gudnason", "Matthias J. van Osch"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0144743.g003", "stats"=>{"downloads"=>1, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Representative_CBF_maps_of_one_study_participant_/1624486", "title"=>"Representative CBF maps of one study participant.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2015-12-17 08:10:08"}

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  • {"unique-ip"=>"5", "full-text"=>"5", "pdf"=>"4", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"4"}
  • {"unique-ip"=>"8", "full-text"=>"10", "pdf"=>"3", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"5"}
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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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