{"id":"https://openalex.org/W2294450945","doi":"https://doi.org/10.1109/embc.2015.7319325","title":"Techniques for estimating blood pressure variation using video images","display_name":"Techniques for estimating blood pressure variation using video images","publication_year":2015,"publication_date":"2015-08-01","ids":{"openalex":"https://openalex.org/W2294450945","doi":"https://doi.org/10.1109/embc.2015.7319325","mag":"2294450945","pmid":"https://pubmed.ncbi.nlm.nih.gov/26737225"},"language":"en","primary_location":{"id":"doi:10.1109/embc.2015.7319325","is_oa":false,"landing_page_url":"https://doi.org/10.1109/embc.2015.7319325","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5071098555","display_name":"Norihiro Sugita","orcid":"https://orcid.org/0000-0002-0288-2735"},"institutions":[{"id":"https://openalex.org/I103605164","display_name":"Tohoku Institute of Technology","ror":"https://ror.org/01phqre83","country_code":"JP","type":"education","lineage":["https://openalex.org/I103605164"]}],"countries":["JP"],"is_corresponding":true,"raw_author_name":"Norihiro Sugita","raw_affiliation_strings":["Tohoku Daigaku, Sendai, Miyagi, JP"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tohoku Daigaku, Sendai, Miyagi, JP","institution_ids":["https://openalex.org/I103605164"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012055097","display_name":"Kazuma Obara","orcid":null},"institutions":[{"id":"https://openalex.org/I201537933","display_name":"Tohoku University","ror":"https://ror.org/01dq60k83","country_code":"JP","type":"education","lineage":["https://openalex.org/I201537933"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kazuma Obara","raw_affiliation_strings":["Department of Electrical and Communication Engineering, Tohoku University, Sendai, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Communication Engineering, Tohoku University, Sendai, Japan","institution_ids":["https://openalex.org/I201537933"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063371267","display_name":"Makoto Yoshizawa","orcid":"https://orcid.org/0000-0003-2484-6206"},"institutions":[{"id":"https://openalex.org/I201537933","display_name":"Tohoku University","ror":"https://ror.org/01dq60k83","country_code":"JP","type":"education","lineage":["https://openalex.org/I201537933"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Makoto Yoshizawa","raw_affiliation_strings":["Information Synergy Center, Tohoku University, Sendai, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Information Synergy Center, Tohoku University, Sendai, Japan","institution_ids":["https://openalex.org/I201537933"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101874162","display_name":"Makoto Abe","orcid":"https://orcid.org/0009-0000-3674-2151"},"institutions":[{"id":"https://openalex.org/I201537933","display_name":"Tohoku University","ror":"https://ror.org/01dq60k83","country_code":"JP","type":"education","lineage":["https://openalex.org/I201537933"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Makoto Abe","raw_affiliation_strings":["Department of Electrical and Communication Engineering, Tohoku University, Sendai, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Communication Engineering, Tohoku University, Sendai, Japan","institution_ids":["https://openalex.org/I201537933"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5105269463","display_name":"Akira Tanaka","orcid":"https://orcid.org/0000-0003-0055-8234"},"institutions":[{"id":"https://openalex.org/I58089638","display_name":"Fukushima University","ror":"https://ror.org/03zjb7z20","country_code":"JP","type":"education","lineage":["https://openalex.org/I58089638"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Akira Tanaka","raw_affiliation_strings":["Department of Human Support System, Fukushima University, Fukushima, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Human Support System, Fukushima University, Fukushima, Japan","institution_ids":["https://openalex.org/I58089638"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5021841762","display_name":"Noriyasu Homma","orcid":"https://orcid.org/0000-0001-7543-6181"},"institutions":[{"id":"https://openalex.org/I201537933","display_name":"Tohoku University","ror":"https://ror.org/01dq60k83","country_code":"JP","type":"education","lineage":["https://openalex.org/I201537933"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Noriyasu Homma","raw_affiliation_strings":["Department of Health Science, Tohoku University, Sendai, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Health Science, Tohoku University, Sendai, Japan","institution_ids":["https://openalex.org/I201537933"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":6,"corresponding_author_ids":["https://openalex.org/A5071098555"],"corresponding_institution_ids":["https://openalex.org/I103605164"],"apc_list":null,"apc_paid":null,"fwci":2.3636,"has_fulltext":false,"cited_by_count":60,"citation_normalized_percentile":{"value":0.8824048,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":99},"biblio":{"volume":"2015","issue":null,"first_page":"4218","last_page":"4221"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11196","display_name":"Non-Invasive Vital Sign Monitoring","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11196","display_name":"Non-Invasive Vital Sign Monitoring","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11700","display_name":"Hemodynamic Monitoring and Therapy","score":0.9994000196456909,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.9987999796867371,"subfield":{"id":"https://openalex.org/subfields/2705","display_name":"Cardiology and Cardiovascular Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/photoplethysmogram","display_name":"Photoplethysmogram","score":0.9179928302764893},{"id":"https://openalex.org/keywords/blood-pressure","display_name":"Blood pressure","score":0.6349070072174072},{"id":"https://openalex.org/keywords/pulse","display_name":"Pulse (music)","score":0.5985035300254822},{"id":"https://openalex.org/keywords/pulse-wave","display_name":"Pulse wave","score":0.479042649269104},{"id":"https://openalex.org/keywords/biomedical-engineering","display_name":"Biomedical engineering","score":0.4606940448284149},{"id":"https://openalex.org/keywords/forehead","display_name":"Forehead","score":0.4602107107639313},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.4432182013988495},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.40502122044563293},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.37106651067733765},{"id":"https://openalex.org/keywords/acoustics","display_name":"Acoustics","score":0.36526787281036377},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.3245938718318939},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.2958822250366211},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.24844232201576233},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.22570449113845825},{"id":"https://openalex.org/keywords/surgery","display_name":"Surgery","score":0.16683080792427063},{"id":"https://openalex.org/keywords/laser","display_name":"Laser","score":0.16077789664268494},{"id":"https://openalex.org/keywords/internal-medicine","display_name":"Internal medicine","score":0.10661029815673828},{"id":"https://openalex.org/keywords/filter","display_name":"Filter (signal processing)","score":0.08510220050811768}],"concepts":[{"id":"https://openalex.org/C116390426","wikidata":"https://www.wikidata.org/wiki/Q7187885","display_name":"Photoplethysmogram","level":3,"score":0.9179928302764893},{"id":"https://openalex.org/C84393581","wikidata":"https://www.wikidata.org/wiki/Q82642","display_name":"Blood pressure","level":2,"score":0.6349070072174072},{"id":"https://openalex.org/C2780167933","wikidata":"https://www.wikidata.org/wiki/Q1550652","display_name":"Pulse (music)","level":3,"score":0.5985035300254822},{"id":"https://openalex.org/C172321821","wikidata":"https://www.wikidata.org/wiki/Q7259685","display_name":"Pulse wave","level":3,"score":0.479042649269104},{"id":"https://openalex.org/C136229726","wikidata":"https://www.wikidata.org/wiki/Q327092","display_name":"Biomedical engineering","level":1,"score":0.4606940448284149},{"id":"https://openalex.org/C2780446394","wikidata":"https://www.wikidata.org/wiki/Q41055","display_name":"Forehead","level":2,"score":0.4602107107639313},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4432182013988495},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.40502122044563293},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.37106651067733765},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.36526787281036377},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.3245938718318939},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.2958822250366211},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.24844232201576233},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.22570449113845825},{"id":"https://openalex.org/C141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","level":1,"score":0.16683080792427063},{"id":"https://openalex.org/C520434653","wikidata":"https://www.wikidata.org/wiki/Q38867","display_name":"Laser","level":2,"score":0.16077789664268494},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.10661029815673828},{"id":"https://openalex.org/C106131492","wikidata":"https://www.wikidata.org/wiki/Q3072260","display_name":"Filter (signal processing)","level":2,"score":0.08510220050811768},{"id":"https://openalex.org/C94915269","wikidata":"https://www.wikidata.org/wiki/Q1834857","display_name":"Detector","level":2,"score":0.0}],"mesh":[{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D001794","descriptor_name":"Blood Pressure","qualifier_ui":"Q000502","qualifier_name":"physiology","is_major_topic":false},{"descriptor_ui":"D001794","descriptor_name":"Blood Pressure","qualifier_ui":"Q000502","qualifier_name":"physiology","is_major_topic":false},{"descriptor_ui":"D001794","descriptor_name":"Blood Pressure","qualifier_ui":"Q000502","qualifier_name":"physiology","is_major_topic":false},{"descriptor_ui":"D001795","descriptor_name":"Blood Pressure Determination","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D001795","descriptor_name":"Blood Pressure Determination","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D001795","descriptor_name":"Blood Pressure Determination","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006339","descriptor_name":"Heart Rate","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006339","descriptor_name":"Heart Rate","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006339","descriptor_name":"Heart Rate","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007259","descriptor_name":"Infrared Rays","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007259","descriptor_name":"Infrared Rays","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007259","descriptor_name":"Infrared Rays","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012815","descriptor_name":"Signal Processing, Computer-Assisted","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012815","descriptor_name":"Signal Processing, Computer-Assisted","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012815","descriptor_name":"Signal Processing, Computer-Assisted","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D014636","descriptor_name":"Valsalva Maneuver","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D014636","descriptor_name":"Valsalva Maneuver","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D014636","descriptor_name":"Valsalva Maneuver","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D014741","descriptor_name":"Video Recording","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D014741","descriptor_name":"Video Recording","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D014741","descriptor_name":"Video Recording","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D017156","descriptor_name":"Photoplethysmography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D017156","descriptor_name":"Photoplethysmography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D017156","descriptor_name":"Photoplethysmography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D055815","descriptor_name":"Young Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D055815","descriptor_name":"Young Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D055815","descriptor_name":"Young Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D063177","descriptor_name":"Pulse Wave Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D063177","descriptor_name":"Pulse Wave Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D063177","descriptor_name":"Pulse Wave Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D064368","descriptor_name":"Healthy Volunteers","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D064368","descriptor_name":"Healthy Volunteers","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D064368","descriptor_name":"Healthy Volunteers","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":2,"locations":[{"id":"doi:10.1109/embc.2015.7319325","is_oa":false,"landing_page_url":"https://doi.org/10.1109/embc.2015.7319325","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)","raw_type":"proceedings-article"},{"id":"pmid:26737225","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/26737225","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.5899999737739563,"id":"https://metadata.un.org/sdg/3","display_name":"Good health and well-being"}],"awards":[],"funders":[{"id":"https://openalex.org/F4320334764","display_name":"Japan Society for the Promotion of Science","ror":"https://ror.org/00hhkn466"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":19,"referenced_works":["https://openalex.org/W204976698","https://openalex.org/W1984554603","https://openalex.org/W1994171917","https://openalex.org/W2008821584","https://openalex.org/W2011989160","https://openalex.org/W2015800398","https://openalex.org/W2082046021","https://openalex.org/W2094162192","https://openalex.org/W2095086719","https://openalex.org/W2112215023","https://openalex.org/W2115013092","https://openalex.org/W2122915712","https://openalex.org/W2156121263","https://openalex.org/W2159745445","https://openalex.org/W2171815385","https://openalex.org/W2185847088","https://openalex.org/W2315948851","https://openalex.org/W4246169631","https://openalex.org/W6683375424"],"related_works":["https://openalex.org/W2143550175","https://openalex.org/W2384584038","https://openalex.org/W2777534421","https://openalex.org/W2067862553","https://openalex.org/W2120037269","https://openalex.org/W638376227","https://openalex.org/W1989626687","https://openalex.org/W2898902003","https://openalex.org/W1721933265","https://openalex.org/W2043326433"],"abstract_inverted_index":{"It":[0],"is":[1,33,41,56,79,193],"important":[2],"to":[3,21,43,58,109,141,195,198,241],"know":[4],"about":[5],"a":[6,19,36,52,90,95,143,160],"sudden":[7],"blood":[8,27,46,61,148,173],"pressure":[9,28,47,62,149,174],"change":[10],"that":[11,167],"occurs":[12],"in":[13,30,201,230],"everyday":[14],"life":[15,32],"and":[16,38,102,119,175,211,222,236],"may":[17,238],"pose":[18],"danger":[20],"human":[22],"health.":[23],"However,":[24,162],"monitoring":[25],"the":[26,45,60,70,114,126,134,147,154,163,168,172,176,183,188,199,202,206,209,219,228,231,234,242],"variation":[29,63,150],"daily":[31],"difficult":[34],"because":[35,151],"bulky":[37],"expensive":[39],"sensor":[40],"needed":[42],"measure":[44],"continuously.":[48],"In":[49,67,226],"this":[50,68],"study,":[51],"new":[53],"non-contact":[54],"method":[55],"proposed":[57,177],"estimate":[59],"using":[64],"video":[65,96,127,220],"images.":[66],"method,":[69],"pulse":[71,83,111,115,155,184],"propagation":[72,116],"time":[73,117,157],"difference":[74,78,118,122,200,229],"or":[75],"instantaneous":[76,120],"phase":[77,121],"calculated":[80,124],"between":[81,171,208],"two":[82],"waves":[84],"obtained":[85,158,186],"from":[86,125,159,187],"different":[87],"parts":[88],"of":[89,129,233],"subject's":[91],"body":[92],"captured":[93],"by":[94],"camera.":[97],"The":[98],"forehead,":[99],"left":[100],"cheek,":[101],"right":[103,189],"hand":[104,237],"are":[105,139],"selected":[106],"as":[107,215],"regions":[108],"obtain":[110],"waves.":[112],"Both":[113],"were":[123,179],"images":[128],"20":[130],"healthy":[131],"subjects":[132],"performing":[133],"Valsalva":[135],"maneuver.":[136],"These":[137],"indices":[138,178],"considered":[140,194],"have":[142],"negative":[144],"correlation":[145,169],"with":[146],"they":[152],"approximate":[153],"transit":[156],"photoplethysmograph.":[161],"experimental":[164],"results":[165],"showed":[166],"coefficients":[170],"approximately":[180],"0.6":[181],"for":[182,218],"wave":[185],"hand.":[190],"This":[191],"result":[192],"be":[196,239],"due":[197],"transmission":[203],"depth":[204],"into":[205],"skin":[207],"green":[210],"infrared":[212],"light":[213,216],"used":[214],"sources":[217],"image":[221],"conventional":[223],"photoplethysmogram,":[224],"respectively.":[225],"addition,":[227],"innervation":[232],"face":[235],"related":[240],"results.":[243]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":5},{"year":2023,"cited_by_count":8},{"year":2022,"cited_by_count":7},{"year":2021,"cited_by_count":8},{"year":2020,"cited_by_count":6},{"year":2019,"cited_by_count":10},{"year":2018,"cited_by_count":6},{"year":2017,"cited_by_count":4},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":1}],"updated_date":"2026-05-05T08:41:31.759640","created_date":"2025-10-10T00:00:00"}
