{"id":"https://openalex.org/W2293543685","doi":"https://doi.org/10.1109/embc.2015.7319319","title":"A multi-spot exploration of the topological structures of the reconstructed phase-space for the detection of cardiac murmurs","display_name":"A multi-spot exploration of the topological structures of the reconstructed phase-space for the detection of cardiac murmurs","publication_year":2015,"publication_date":"2015-08-01","ids":{"openalex":"https://openalex.org/W2293543685","doi":"https://doi.org/10.1109/embc.2015.7319319","mag":"2293543685","pmid":"https://pubmed.ncbi.nlm.nih.gov/26737219"},"language":"en","primary_location":{"id":"doi:10.1109/embc.2015.7319319","is_oa":false,"landing_page_url":"https://doi.org/10.1109/embc.2015.7319319","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":"conference-paper","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/A5048091232","display_name":"Jorge Oliveira","orcid":"https://orcid.org/0000-0002-3190-8367"},"institutions":[{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Jorge Oliveira","raw_affiliation_strings":["Faculdade de Ciencias, Universidade do Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculdade de Ciencias, Universidade do Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5064901027","display_name":"Cristina Oliveira","orcid":"https://orcid.org/0000-0002-9670-2079"},"institutions":[{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Cristina Oliveira","raw_affiliation_strings":["Faculdade de Engenharia, Universidade do Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculdade de Engenharia, Universidade do Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112382347","display_name":"Bruna Lopes Cardoso","orcid":"https://orcid.org/0009-0003-9118-6399"},"institutions":[{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Bruna Cardoso","raw_affiliation_strings":["Faculdade de Ciencias, Universidade do Porto and Faculdade de Medicina da Universidade do Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculdade de Ciencias, Universidade do Porto and Faculdade de Medicina da Universidade do Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5085846849","display_name":"Malik Saad Sultan","orcid":"https://orcid.org/0000-0003-1951-5023"},"institutions":[{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Malik Saad Sultan","raw_affiliation_strings":["Faculdade de Ciencias, Universidade do Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculdade de Ciencias, Universidade do Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5038594477","display_name":"Miguel Coimbra","orcid":"https://orcid.org/0000-0001-7501-6523"},"institutions":[{"id":"https://openalex.org/I182534213","display_name":"Universidade do Porto","ror":"https://ror.org/043pwc612","country_code":"PT","type":"education","lineage":["https://openalex.org/I182534213"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Miguel Tavares Coimbra","raw_affiliation_strings":["Faculdade de Ciencias, Universidade do Porto, Portugal"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculdade de Ciencias, Universidade do Porto, Portugal","institution_ids":["https://openalex.org/I182534213"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I182534213"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":"2015","issue":null,"first_page":"4194","last_page":"4197"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12419","display_name":"Phonocardiography and Auscultation Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2740","display_name":"Pulmonary and Respiratory Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T12419","display_name":"Phonocardiography and Auscultation Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/2740","display_name":"Pulmonary and Respiratory Medicine"},"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/T11309","display_name":"Music and Audio Processing","score":0.9735000133514404,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12647","display_name":"Traditional Chinese Medicine Studies","score":0.9233999848365784,"subfield":{"id":"https://openalex.org/subfields/2707","display_name":"Complementary and alternative 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/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.590106725692749},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5662853121757507},{"id":"https://openalex.org/keywords/heart-sounds","display_name":"Heart sounds","score":0.5556384325027466},{"id":"https://openalex.org/keywords/fractal","display_name":"Fractal","score":0.5369209051132202},{"id":"https://openalex.org/keywords/auscultation","display_name":"Auscultation","score":0.5354148745536804},{"id":"https://openalex.org/keywords/classifier","display_name":"Classifier (UML)","score":0.5098280310630798},{"id":"https://openalex.org/keywords/feature-extraction","display_name":"Feature extraction","score":0.5059830546379089},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5002152919769287},{"id":"https://openalex.org/keywords/feature","display_name":"Feature (linguistics)","score":0.4828094244003296},{"id":"https://openalex.org/keywords/heart-murmur","display_name":"Heart murmur","score":0.457175076007843},{"id":"https://openalex.org/keywords/feature-vector","display_name":"Feature vector","score":0.4439655542373657},{"id":"https://openalex.org/keywords/audio-signal","display_name":"Audio signal","score":0.4206249415874481},{"id":"https://openalex.org/keywords/feature-selection","display_name":"Feature selection","score":0.4173967242240906},{"id":"https://openalex.org/keywords/fractal-dimension","display_name":"Fractal dimension","score":0.41637641191482544},{"id":"https://openalex.org/keywords/speech-recognition","display_name":"Speech recognition","score":0.384468138217926},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.24315106868743896},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.11039870977401733},{"id":"https://openalex.org/keywords/cardiology","display_name":"Cardiology","score":0.08410701155662537}],"concepts":[{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.590106725692749},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5662853121757507},{"id":"https://openalex.org/C2779435589","wikidata":"https://www.wikidata.org/wiki/Q967103","display_name":"Heart sounds","level":2,"score":0.5556384325027466},{"id":"https://openalex.org/C40636538","wikidata":"https://www.wikidata.org/wiki/Q81392","display_name":"Fractal","level":2,"score":0.5369209051132202},{"id":"https://openalex.org/C2777324038","wikidata":"https://www.wikidata.org/wiki/Q779054","display_name":"Auscultation","level":2,"score":0.5354148745536804},{"id":"https://openalex.org/C95623464","wikidata":"https://www.wikidata.org/wiki/Q1096149","display_name":"Classifier (UML)","level":2,"score":0.5098280310630798},{"id":"https://openalex.org/C52622490","wikidata":"https://www.wikidata.org/wiki/Q1026626","display_name":"Feature extraction","level":2,"score":0.5059830546379089},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5002152919769287},{"id":"https://openalex.org/C2776401178","wikidata":"https://www.wikidata.org/wiki/Q12050496","display_name":"Feature (linguistics)","level":2,"score":0.4828094244003296},{"id":"https://openalex.org/C2780379053","wikidata":"https://www.wikidata.org/wiki/Q1060911","display_name":"Heart murmur","level":2,"score":0.457175076007843},{"id":"https://openalex.org/C83665646","wikidata":"https://www.wikidata.org/wiki/Q42139305","display_name":"Feature vector","level":2,"score":0.4439655542373657},{"id":"https://openalex.org/C64922751","wikidata":"https://www.wikidata.org/wiki/Q4650799","display_name":"Audio signal","level":3,"score":0.4206249415874481},{"id":"https://openalex.org/C148483581","wikidata":"https://www.wikidata.org/wiki/Q446488","display_name":"Feature selection","level":2,"score":0.4173967242240906},{"id":"https://openalex.org/C26546657","wikidata":"https://www.wikidata.org/wiki/Q1412452","display_name":"Fractal dimension","level":3,"score":0.41637641191482544},{"id":"https://openalex.org/C28490314","wikidata":"https://www.wikidata.org/wiki/Q189436","display_name":"Speech recognition","level":1,"score":0.384468138217926},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.24315106868743896},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.11039870977401733},{"id":"https://openalex.org/C164705383","wikidata":"https://www.wikidata.org/wiki/Q10379","display_name":"Cardiology","level":1,"score":0.08410701155662537},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0},{"id":"https://openalex.org/C13895895","wikidata":"https://www.wikidata.org/wiki/Q3270773","display_name":"Speech coding","level":2,"score":0.0}],"mesh":[{"descriptor_ui":"D000068598","descriptor_name":"Data Accuracy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000068598","descriptor_name":"Data Accuracy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000068598","descriptor_name":"Data Accuracy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000465","descriptor_name":"Algorithms","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D000465","descriptor_name":"Algorithms","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D000465","descriptor_name":"Algorithms","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D006337","descriptor_name":"Heart Murmurs","qualifier_ui":"Q000145","qualifier_name":"classification","is_major_topic":false},{"descriptor_ui":"D006337","descriptor_name":"Heart Murmurs","qualifier_ui":"Q000145","qualifier_name":"classification","is_major_topic":false},{"descriptor_ui":"D006337","descriptor_name":"Heart Murmurs","qualifier_ui":"Q000145","qualifier_name":"classification","is_major_topic":false},{"descriptor_ui":"D006337","descriptor_name":"Heart Murmurs","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D006337","descriptor_name":"Heart Murmurs","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D006337","descriptor_name":"Heart Murmurs","qualifier_ui":"Q000175","qualifier_name":"diagnosis","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":"D012815","descriptor_name":"Signal Processing, Computer-Assisted","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D012815","descriptor_name":"Signal Processing, Computer-Assisted","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D012815","descriptor_name":"Signal Processing, Computer-Assisted","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true}],"locations_count":2,"locations":[{"id":"doi:10.1109/embc.2015.7319319","is_oa":false,"landing_page_url":"https://doi.org/10.1109/embc.2015.7319319","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:26737219","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/26737219","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":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":10,"referenced_works":["https://openalex.org/W1967390037","https://openalex.org/W1998943174","https://openalex.org/W2024866217","https://openalex.org/W2043999892","https://openalex.org/W2143047084","https://openalex.org/W2326906923","https://openalex.org/W2567235724","https://openalex.org/W3124661333","https://openalex.org/W4388290870","https://openalex.org/W6631021127"],"related_works":["https://openalex.org/W2462513779","https://openalex.org/W2066804906","https://openalex.org/W1982614964","https://openalex.org/W4246352510","https://openalex.org/W310243274","https://openalex.org/W2013970413","https://openalex.org/W1601748943","https://openalex.org/W3191193899","https://openalex.org/W2904211081","https://openalex.org/W2062210329"],"abstract_inverted_index":{"Acoustic":[0],"heart":[1,12,37,51,119,151],"signals":[2,64],"are":[3,47,55,65,78,81,105,139],"generated":[4],"by":[5],"a":[6,34,58,68],"turbulence":[7],"effect":[8],"created":[9],"when":[10],"the":[11,22,26,50,84,93,106,111,115,122,132,143,147],"valves":[13],"snap":[14],"shut,":[15],"and":[16,89,95,114],"therefore":[17],"carrying":[18],"significant":[19],"information":[20],"of":[21,25,75,87,109,118,137,146],"underlying":[23,116],"functionality":[24],"cardiovascular":[27],"system.":[28],"In":[29],"this":[30],"paper,":[31],"we":[32],"present":[33],"method":[35],"for":[36,131,150],"murmur":[38,152],"classification":[39,128],"divided":[40],"into":[41],"three":[42],"major":[43],"steps:":[44],"a)":[45],"features":[46,54,77,104],"extracted":[48],"from":[49],"sound;":[52],"b)":[53],"selected":[56],"using":[57,67],"Backward":[59],"Feature":[60],"Selection":[61],"algorithm;":[62],"c)":[63],"classified":[66],"K-nearest":[69],"neighbor's":[70],"classifier.":[71],"A":[72],"new":[73],"set":[74],"fractal":[76,103],"proposed,":[79],"which":[80],"based":[82],"on":[83,92],"distinct":[85],"signatures":[86],"complexity":[88],"self-similarity":[90],"registered":[91],"normal":[94],"pathogenic":[96],"cases.":[97],"The":[98,127],"experimental":[99],"results":[100,129],"show":[101],"that":[102],"most":[107],"capable":[108],"describing":[110],"non-linear":[112],"structure":[113],"dynamics":[117],"sounds":[120],"among":[121],"all":[123],"feature":[124],"families":[125],"tested.":[126],"achieved":[130],"mitral":[133],"auscultation":[134],"spot":[135],"(88%":[136],"accuracy)":[138],"in":[140],"agreement":[141],"with":[142],"current":[144],"state":[145],"art":[148],"methods":[149],"classification.":[153]},"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2016,"cited_by_count":2}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}