{"id":3579,"date":"2017-12-14T10:12:31","date_gmt":"2017-12-14T07:12:31","guid":{"rendered":"https:\/\/umram.bilkent.edu.tr\/?p=3579"},"modified":"2018-09-13T10:13:15","modified_gmt":"2018-09-13T07:13:15","slug":"z-gradyan-dizisi-kullanilarak-tek-bantli-rf-darbe-ile-coklu-kesit-uyarimi","status":"publish","type":"post","link":"https:\/\/umram.bilkent.edu.tr\/index.php\/tr\/2017\/12\/14\/z-gradyan-dizisi-kullanilarak-tek-bantli-rf-darbe-ile-coklu-kesit-uyarimi\/","title":{"rendered":"Z-Gradyan Dizisi Kullan\u0131larak Tek Bantl\u0131 RF Darbe ile \u00c7oklu Kesit Uyar\u0131m\u0131"},"content":{"rendered":"<p>UMRAM ara\u015ft\u0131rmac\u0131lar\u0131, \u201cA z-gradient array for simultaneous multi-slice excitation with a single band RF pulse\u201d isimli yeni bir makele yay\u0131nlad\u0131. Bu \u00e7al\u0131\u015fmada, z-gradyan dizisi kullan\u0131larak \u00e7oklu kesitlerin tek bantl\u0131 RF darbe ile uyar\u0131labilece\u011fi g\u00f6sterildi. \u00c7oklu kesit g\u00f6r\u00fcnt\u00fcleme, g\u00f6r\u00fcnt\u00fcleme s\u00fcresini azaltmas\u0131 veya sinyal g\u00fcr\u00fclt\u00fc oran\u0131n\u0131 art\u0131rmas\u0131 nedeni ile son y\u0131llarda s\u0131kl\u0131kla kullan\u0131lmaya ba\u015fland\u0131. Geleneksel y\u00f6ntemlerde, \u00e7oklu kesitlerin uyar\u0131m\u0131 \u00e7ok bantl\u0131 RF darbe ile sa\u011flan\u0131yor. Fakat \u00e7ok bantl\u0131 RF darbeler, tepe voltaj\u0131n\u0131, tepe g\u00fcc\u00fcn\u00fc ve \u00f6zg\u00fcl so\u011furulma h\u0131z\u0131n\u0131 (SAR) art\u0131rmaktad\u0131r. Dolay\u0131s\u0131yla \u00e7ok bantl\u0131 RF darbelerin tasar\u0131m\u0131 g\u00fc\u00e7 y\u00fckselte\u00e7leri veya SAR kaynakl\u0131 hasta g\u00fcvenli\u011fi a\u00e7\u0131s\u0131ndan limitlenmektedir. Bu \u00e7al\u0131\u015fmada, uzaysal olarak periyodik gradyan alanlar z-gradyan dizisi kullan\u0131larak yarat\u0131lm\u0131\u015f ve b\u00f6ylece bir\u00e7ok kesit konumu tek bantl\u0131 bir RF darbe ile uyar\u0131labilmi\u015ftir. Dolay\u0131s\u0131yla tepe g\u00fcc\u00fc, tepe voltaj\u0131, SAR veya RF darbe s\u00fcresinin artmas\u0131 engellenmi\u015ftir. Yenilik\u00e7i z-gradyan dizisi, 9 kanall\u0131 bir z-gradyan dizisi, Tx\/Rx RF sarg\u0131, 9 gradyan g\u00fc\u00e7 y\u00fckselteci ve control devrelerinden olu\u015fmaktad\u0131r. Tasar\u0131m y\u00f6ntemleri ve farkl\u0131 ko\u015fullar\u0131n performans de\u011ferlendirmeleri \u00e7al\u0131\u015fma kapsam\u0131nda incelenmi\u015ftir. Son olarak, MR deneyleri \u00f6nerilken y\u00f6ntemin ba\u015far\u0131l\u0131 bir \u015fekilde tek bantl\u0131 RF darbe ile \u00e7oklu kesit uyar\u0131m\u0131 sa\u011flayabildi\u011fini do\u011frulam\u0131\u015ft\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>UMRAM ara\u015ft\u0131rmac\u0131lar\u0131, \u201cA z-gradient array for simultaneous multi-slice excitation with a single band RF pulse\u201d isimli yeni bir makele yay\u0131nlad\u0131. Bu \u00e7al\u0131\u015fmada, z-gradyan dizisi kullan\u0131larak \u00e7oklu kesitlerin tek bantl\u0131 RF darbe ile uyar\u0131labilece\u011fi g\u00f6sterildi. \u00c7oklu kesit g\u00f6r\u00fcnt\u00fcleme, g\u00f6r\u00fcnt\u00fcleme s\u00fcresini azaltmas\u0131 veya sinyal g\u00fcr\u00fclt\u00fc oran\u0131n\u0131 art\u0131rmas\u0131 nedeni ile son y\u0131llarda s\u0131kl\u0131kla kullan\u0131lmaya ba\u015fland\u0131. Geleneksel y\u00f6ntemlerde, \u00e7oklu [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3577,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[445],"tags":[],"_links":{"self":[{"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/posts\/3579"}],"collection":[{"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/comments?post=3579"}],"version-history":[{"count":1,"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/posts\/3579\/revisions"}],"predecessor-version":[{"id":3580,"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/posts\/3579\/revisions\/3580"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/media\/3577"}],"wp:attachment":[{"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/media?parent=3579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/categories?post=3579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/umram.bilkent.edu.tr\/index.php\/wp-json\/wp\/v2\/tags?post=3579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}