{"id":"https://openalex.org/W2062357650","doi":"https://doi.org/10.1117/12.2007922","title":"Freehand ultrasound calibration: phantom versus tracked pointer","display_name":"Freehand ultrasound calibration: phantom versus tracked pointer","publication_year":2013,"publication_date":"2013-03-14","ids":{"openalex":"https://openalex.org/W2062357650","doi":"https://doi.org/10.1117/12.2007922","mag":"2062357650"},"language":"en","primary_location":{"id":"doi:10.1117/12.2007922","is_oa":false,"landing_page_url":"https://doi.org/10.1117/12.2007922","pdf_url":null,"source":{"id":"https://openalex.org/S183492911","display_name":"Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE","issn_l":"0277-786X","issn":["0277-786X","1996-756X"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310315543","host_organization_name":"SPIE","host_organization_lineage":["https://openalex.org/P4310315543"],"host_organization_lineage_names":["SPIE"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"SPIE Proceedings","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"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/A5039985523","display_name":"Mattea Welch","orcid":"https://orcid.org/0000-0002-5887-9826"},"institutions":[{"id":"https://openalex.org/I204722609","display_name":"Queen's University","ror":"https://ror.org/02y72wh86","country_code":"CA","type":"education","lineage":["https://openalex.org/I204722609"]}],"countries":["CA"],"is_corresponding":true,"raw_author_name":"Mattea Welch","raw_affiliation_strings":["Queen's Univ. (Canada)","Queen's Univ.,   Canada"],"affiliations":[{"raw_affiliation_string":"Queen's Univ. (Canada)","institution_ids":["https://openalex.org/I204722609"]},{"raw_affiliation_string":"Queen's Univ.,   Canada","institution_ids":["https://openalex.org/I204722609"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5103721105","display_name":"Jennifer Andrea","orcid":null},"institutions":[{"id":"https://openalex.org/I204722609","display_name":"Queen's University","ror":"https://ror.org/02y72wh86","country_code":"CA","type":"education","lineage":["https://openalex.org/I204722609"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Jennifer Andrea","raw_affiliation_strings":["Queen's Univ. (Canada)","Queen's Univ.,   Canada"],"affiliations":[{"raw_affiliation_string":"Queen's Univ. (Canada)","institution_ids":["https://openalex.org/I204722609"]},{"raw_affiliation_string":"Queen's Univ.,   Canada","institution_ids":["https://openalex.org/I204722609"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5027063944","display_name":"Tam\u00e1s Ungi","orcid":"https://orcid.org/0000-0003-4743-0609"},"institutions":[{"id":"https://openalex.org/I204722609","display_name":"Queen's University","ror":"https://ror.org/02y72wh86","country_code":"CA","type":"education","lineage":["https://openalex.org/I204722609"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Tamas Ungi","raw_affiliation_strings":["Queen's Univ. (Canada)","Queen's Univ.,   Canada"],"affiliations":[{"raw_affiliation_string":"Queen's Univ. (Canada)","institution_ids":["https://openalex.org/I204722609"]},{"raw_affiliation_string":"Queen's Univ.,   Canada","institution_ids":["https://openalex.org/I204722609"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5084753910","display_name":"G\u00e1bor Fichtinger","orcid":"https://orcid.org/0000-0002-6354-262X"},"institutions":[{"id":"https://openalex.org/I204722609","display_name":"Queen's University","ror":"https://ror.org/02y72wh86","country_code":"CA","type":"education","lineage":["https://openalex.org/I204722609"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Gabor Fichtinger","raw_affiliation_strings":["Queen's Univ. (Canada)","Queen's Univ.,   Canada"],"affiliations":[{"raw_affiliation_string":"Queen's Univ. (Canada)","institution_ids":["https://openalex.org/I204722609"]},{"raw_affiliation_string":"Queen's Univ.,   Canada","institution_ids":["https://openalex.org/I204722609"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5039985523"],"corresponding_institution_ids":["https://openalex.org/I204722609"],"apc_list":null,"apc_paid":null,"fwci":0.3993,"has_fulltext":false,"cited_by_count":10,"citation_normalized_percentile":{"value":0.67437645,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":97},"biblio":{"volume":"8671","issue":null,"first_page":"86711C","last_page":"86711C"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10358","display_name":"Advanced Radiotherapy Techniques","score":0.9926000237464905,"subfield":{"id":"https://openalex.org/subfields/3108","display_name":"Radiation"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10358","display_name":"Advanced Radiotherapy Techniques","score":0.9926000237464905,"subfield":{"id":"https://openalex.org/subfields/3108","display_name":"Radiation"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10727","display_name":"Ultrasound Imaging and Elastography","score":0.9916999936103821,"subfield":{"id":"https://openalex.org/subfields/2741","display_name":"Radiology, Nuclear Medicine and Imaging"},"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/T10868","display_name":"Soft Robotics and Applications","score":0.9896000027656555,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/imaging-phantom","display_name":"Imaging phantom","score":0.8530997633934021},{"id":"https://openalex.org/keywords/ground-truth","display_name":"Ground truth","score":0.74457186460495},{"id":"https://openalex.org/keywords/calibration","display_name":"Calibration","score":0.656378448009491},{"id":"https://openalex.org/keywords/reproducibility","display_name":"Reproducibility","score":0.6270068883895874},{"id":"https://openalex.org/keywords/pointer","display_name":"Pointer (user interface)","score":0.507590651512146},{"id":"https://openalex.org/keywords/ultrasound","display_name":"Ultrasound","score":0.4782125651836395},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.4574744701385498},{"id":"https://openalex.org/keywords/transducer","display_name":"Transducer","score":0.41494446992874146},{"id":"https://openalex.org/keywords/landmark","display_name":"Landmark","score":0.41070297360420227},{"id":"https://openalex.org/keywords/acoustics","display_name":"Acoustics","score":0.34323424100875854},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.3336635231971741},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.33313700556755066},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.33017057180404663},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.3275761008262634},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.20877739787101746},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.09118393063545227}],"concepts":[{"id":"https://openalex.org/C104293457","wikidata":"https://www.wikidata.org/wiki/Q28324852","display_name":"Imaging phantom","level":2,"score":0.8530997633934021},{"id":"https://openalex.org/C146849305","wikidata":"https://www.wikidata.org/wiki/Q370766","display_name":"Ground truth","level":2,"score":0.74457186460495},{"id":"https://openalex.org/C165838908","wikidata":"https://www.wikidata.org/wiki/Q736777","display_name":"Calibration","level":2,"score":0.656378448009491},{"id":"https://openalex.org/C9893847","wikidata":"https://www.wikidata.org/wiki/Q1425625","display_name":"Reproducibility","level":2,"score":0.6270068883895874},{"id":"https://openalex.org/C150202949","wikidata":"https://www.wikidata.org/wiki/Q107602","display_name":"Pointer (user interface)","level":2,"score":0.507590651512146},{"id":"https://openalex.org/C143753070","wikidata":"https://www.wikidata.org/wiki/Q162564","display_name":"Ultrasound","level":2,"score":0.4782125651836395},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.4574744701385498},{"id":"https://openalex.org/C56318395","wikidata":"https://www.wikidata.org/wiki/Q215928","display_name":"Transducer","level":2,"score":0.41494446992874146},{"id":"https://openalex.org/C2780297707","wikidata":"https://www.wikidata.org/wiki/Q4895393","display_name":"Landmark","level":2,"score":0.41070297360420227},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.34323424100875854},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3336635231971741},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.33313700556755066},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.33017057180404663},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.3275761008262634},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.20877739787101746},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.09118393063545227},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1117/12.2007922","is_oa":false,"landing_page_url":"https://doi.org/10.1117/12.2007922","pdf_url":null,"source":{"id":"https://openalex.org/S183492911","display_name":"Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE","issn_l":"0277-786X","issn":["0277-786X","1996-756X"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310315543","host_organization_name":"SPIE","host_organization_lineage":["https://openalex.org/P4310315543"],"host_organization_lineage_names":["SPIE"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"SPIE Proceedings","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":9,"referenced_works":["https://openalex.org/W1972967559","https://openalex.org/W1986706016","https://openalex.org/W1993267444","https://openalex.org/W2006538208","https://openalex.org/W2027235293","https://openalex.org/W2089461082","https://openalex.org/W2103647684","https://openalex.org/W2116000261","https://openalex.org/W2151560515"],"related_works":["https://openalex.org/W2056853153","https://openalex.org/W2057559274","https://openalex.org/W2005087563","https://openalex.org/W2378111931","https://openalex.org/W2052388267","https://openalex.org/W2950647290","https://openalex.org/W1968481813","https://openalex.org/W2620829895","https://openalex.org/W2356918560","https://openalex.org/W4243161226"],"abstract_inverted_index":{"<strong>PURPOSE:</strong>":[0],"Ultrasound-guided":[1],"tracked":[2,62,124,216,226],"navigation":[3],"requires":[4],"spatial":[5],"calibration":[6,25,155,181],"between":[7],"the":[8,12,16,71,98,107,117,186,215],"ultrasound":[9,31],"beam":[10],"and":[11,18,51,54,65,75,112,136,173,200],"tracker.":[13],"We":[14],"examined":[15],"reproducibility":[17],"accuracy":[19,66,141,237],"of":[20,36,56,93,100,109,129,162,189],"two":[21],"popular":[22],"open":[23],"source":[24],"methods<sup>1</sup>":[26],"with":[27,47,60,86,123,144,156,214,241],"a":[28,43,61,91,127,154,157,183,225,229],"handheld":[29],"linear":[30],"transducer.":[32],"<strong>METHODS:</strong>":[33],"A":[34],"total":[35],"10":[37],"calibrations":[38,239],"were":[39,67],"performed":[40],"using":[41,224],"(1)":[42],"double":[44],"N-wire":[45,88,151,242],"phantom":[46,89,152],"automatic":[48],"image":[49],"segmentation":[50],"registration;":[52],"(2)":[53],"registration":[55],"landmark":[57,80],"points":[58],"collected":[59],"pointer.":[63],"Reproducibility":[64],"characterized":[68],"by":[69,76],"comparing":[70,77],"resulting":[72],"transformation":[73],"matrices,":[74],"ground":[78,145,160,187,208],"truth":[79,146,161,188,209],"points.":[81,149],"<strong>RESULTS:</strong>":[82],"Transformation":[83,120],"matrices":[84,121],"calculated":[85,240],"an":[87],"showed":[90,126,235],"variance":[92,128],"X:":[94,130,163,190],"0.02":[95],"mm":[96,105,115,135],"(in":[97,106,116],"direction":[99,108],"sound":[101],"propagation),":[102],"Y:":[103,133,168,195],"0.03":[104],"transducer":[110],"elements)":[111],"Z:":[113,137,174,201],"0.21":[114],"elevation":[118],"direction).":[119],"obtained":[122],"pointer":[125,180,217,227],"0.1":[131],"mm,":[132,167,172,194,199],"0.10":[134],"0.43":[138],"mm.":[139,178,205],"Calibration":[140,223],"was":[142,210],"tested":[143],"cross":[147],"wire":[148],"The":[150],"provided":[153],"distance":[158,184],"from":[159,185,207],"2.44":[164],"&plusmn;":[165,170,176,192,197,203],"1.44":[166],"1.21":[169],"0.88":[171],"1.12":[175],"0.82":[177],"Tracked":[179],"had":[182,228],"0.23":[191],"0.16":[193],"0.62":[196],"0.31":[198],"0.45":[202],"0.33":[204],"Distance":[206],"significantly":[211],"less":[212],"(p&lt;0.01)":[213],"method":[218],"in":[219],"all":[220],"directions.":[221],"<strong>CONCLUSION:</strong>":[222],"slightly":[230],"greater":[231],"variance;":[232],"however":[233],"it":[234],"better":[236],"over":[238],"phantoms.":[243]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2023,"cited_by_count":3},{"year":2022,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":2},{"year":2017,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}