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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleBroadband ultrasound attenuation in the calcaneal region: A comparative study of single-position versus scanning systemspt_BR
dc.contributor.authorMaia, JMpt_BR
dc.contributor.authorCosta, ETpt_BR
dc.contributor.authorNeto, JFMpt_BR
dc.contributor.authorButton, VLSNpt_BR
unicamp.authorMaia, Joaquim M. Univ Tecnol Fed Parana, DAELN CPGEI UTFPR, Dept Elect Engn, BR-80230901 Curitiba, PR, Brazilpt_BR
unicamp.authorMaia, Joaquim M. Univ Tecnol Fed Parana, DAELN CPGEI UTFPR, Grad Sch Elect Engn & Appl Comp Sci, BR-80230901 Curitiba, PR, Brazilpt_BR
unicamp.authorCosta, Eduardo T. Button, Vera L. S. N. State Univ Campinas UNICAMP, Dept Biomed Engn, Sch Elect & Comp Engn DEB FEEC, Ctr Biomed Engn, BR-13084971 Campinas, SP, Brazilpt_BR
unicamp.authorNeto, Joao F. Marques State Univ Campinas FCM UNICAMP, Fac Med Sci, Dept Clin Med, BR-13083970 Campinas, SP, Brazilpt_BR
dc.subject.wosX-ray Absorptiometrypt_BR
dc.subject.wosBone-mineral Densitypt_BR
dc.subject.wosQuantitative Ultrasoundpt_BR
dc.subject.wosImaging Ultrasonometrypt_BR
dc.subject.wosPostmenopausal Womenpt_BR
dc.subject.wosOs Calcispt_BR
dc.description.abstractThis work describes a system developed to measure the broadband ultrasound attenuation (BUA) in the calcaneal region. The patient's calcanei were inspected using a microcomputer-controlled X-Y axis displacement unit with two 500-kHz, central-frequency, ultrasound transducers. The transducers facing each other are submerged in a small water tank with a support for the patient's foot between them. The system allows data to be collected from a single position or by scanning the calcaneal region to obtain a BUA map. Tests were carried out on 201 patients (110 using the single-position method, and 91 using the scanning method). The results were compared with those of densitometry tests performed using the dual energy X-ray absorptiometry (DEXA) technique (single position: r = 0.50; P < 0.0001; scanner: r = 0.75; P < 0.0001). It was concluded that the single position method is more susceptible to errors due to the difficulty in positioning the transducers relative to the calcaneus. The scanning method provides better results and can be used to screen patients before referring them for
dc.relation.ispartofIeee Transactions On Ultrasonics Ferroelectrics And Frequency Controlpt_BR
dc.relation.ispartofabbreviationIEEE Trans. Ultrason. Ferroelectr. Freq. Controlpt_BR
dc.publisherIeee-inst Electrical Electronics Engineers Incpt_BR
dc.identifier.citationIeee Transactions On Ultrasonics Ferroelectrics And Frequency Control. Ieee-inst Electrical Electronics Engineers Inc, v. 55, n. 1, n. 64, n. 73, 2008.pt_BR
dc.sourceWeb of Sciencept_BR
dc.description.provenanceMade available in DSpace on 2014-07-30T17:00:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2008en
dc.description.provenanceMade available in DSpace on 2015-11-26T17:28:01Z (GMT). No. of bitstreams: 2 WOS000252782200005.pdf: 1618271 bytes, checksum: a403e1c1401804ba85ad7f774d6ce5bc (MD5) WOS000252782200005.pdf.txt: 44369 bytes, checksum: 38c3f86e21f70163e55d8b6de3c04584 (MD5) Previous issue date: 2008en
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