{"id":24540,"date":"2014-02-26T00:05:44","date_gmt":"2014-02-26T00:05:44","guid":{"rendered":"https:\/\/www.institutodeengenharia.org.br\/?p=24540"},"modified":"2014-02-26T11:35:02","modified_gmt":"2014-02-26T11:35:02","slug":"rotor-de-som-promete-revolucionar-imagens-medicas","status":"publish","type":"post","link":"https:\/\/www.institutodeengenharia.org.br\/site\/2014\/02\/26\/rotor-de-som-promete-revolucionar-imagens-medicas\/","title":{"rendered":"Rotor de som promete revolucionar imagens m\u00e9dicas"},"content":{"rendered":"<p>A luz torcida causou uma revolu\u00e7\u00e3o no campo n\u00e3o apenas da fot\u00f4nica, mas tamb\u00e9m da nanotecnologia, por exemplo, permitindo a cria\u00e7\u00e3o de um trip\u00e9 de luz capaz de levitar objetos. <\/p>\n<p>As apostas agora est\u00e3o abertas para o que ser\u00e1 poss\u00edvel fazer com o &#8220;som torcido&#8221;. <\/p>\n<p>Xue Jiang e seus colegas da Universidade Nanjing, na China, criaram um dispositivo capaz de manipular o som com uma flexibilidade sem precedentes. <\/p>\n<p>Segundo eles, sua t\u00e9cnica permitir\u00e1 a cria\u00e7\u00e3o de equipamentos de ultra-som de nova gera\u00e7\u00e3o, revolucionando o campo do imageamento m\u00e9dico. <\/p>\n<p>Usando metamateriais, os pesquisadores constru\u00edram um &#8220;rotor de campo ac\u00fastico&#8221;, que consegue girar a frente da onda de forma que ela parece estar se propagando em outra dire\u00e7\u00e3o. <\/p>\n<p>Rotores de campo para ondas eletromagn\u00e9ticas e ondas de l\u00edquidos j\u00e1 foram demonstrados experimentalmente, sendo promissores nas suas respectivas \u00e1reas, mas &#8220;outro tipo importante de onda cl\u00e1ssica, uma onda ac\u00fastica, \u00e9 uma parte muito mais familiar do nosso cotidiano e poder\u00e1 encontrar aplica\u00e7\u00f5es em uma variedade de situa\u00e7\u00f5es,&#8221; disse o professor Jian-chun Cheng, coordenador do trabalho. <\/p>\n<p>O avan\u00e7o foi poss\u00edvel porque a equipe descobriu que os rotores ac\u00fasticos podem ser constru\u00eddos com base nos mesmos princ\u00edpios usados para os rotores eletromagn\u00e9ticos, ou seja, usando materiais anisotr\u00f3picos, que possuem propriedades f\u00edsicas que variam em diferentes dire\u00e7\u00f5es. <\/p>\n<p>A equipe espera que o rotor ac\u00fastico, com sua capacidade de manipular livremente as frentes de ondas de som, melhore o funcionamento de equipamentos que exigem o controle preciso das ondas ac\u00fasticas. <\/p>\n<p>A possibilidade de girar as ondas de som permitir\u00e1 melhorar o contraste das imagens de ultra-som e permitir imagear tecidos danificados ou diagnosticar doen\u00e7as de uma forma que n\u00e3o \u00e9 poss\u00edvel com os aparelhos de hoje. <\/p>\n<p><em>Bibliografia: <\/p>\n<p>Broadband field rotator based on acoustic metamaterials <br \/>\nXue Jiang, Bin Liang, Xin-ye Zou, Lei-lei Yin, Jian-chun Cheng <br \/>\nApplied Physics Letters <br \/>\nVol.: Published online <br \/>\nDOI: 10.1063\/1.4866333<\/em><\/p>\n<p><b>Autor: Inova\u00e7\u00e3o Tecnol\u00f3gica<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A luz torcida causou uma revolu\u00e7\u00e3o no campo n\u00e3o apenas da fot\u00f4nica, mas tamb\u00e9m da nanotecnologia, por exemplo, permitindo a cria\u00e7\u00e3o de um trip\u00e9 de luz capaz de levitar objetos. As apostas agora est\u00e3o abertas para o que ser\u00e1 poss\u00edvel fazer com o &#8220;som torcido&#8221;. Xue Jiang e seus colegas da Universidade Nanjing, na China, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,35],"tags":[],"class_list":{"0":"post-24540","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-noticias","7":"category-pesquisa-e-desenvolvimento"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Rotor de som promete revolucionar imagens m\u00e9dicas - Instituto de Engenharia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.institutodeengenharia.org.br\/site\/2014\/02\/26\/rotor-de-som-promete-revolucionar-imagens-medicas\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rotor de som promete revolucionar imagens m\u00e9dicas - Instituto de Engenharia\" \/>\n<meta property=\"og:description\" content=\"A luz torcida causou uma revolu\u00e7\u00e3o no campo n\u00e3o apenas da fot\u00f4nica, mas tamb\u00e9m da nanotecnologia, por exemplo, permitindo a cria\u00e7\u00e3o de um trip\u00e9 de luz capaz de levitar objetos. 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