Y. Zhang , H. Bousack , M. Bick , A. Montsch , H. Soltner , W. Wolf , U. Steinhoff , L. Trahms , P. Endt
{"title":"Magnetocardiography using HTS rf SQUIDs with coplanar resonators","authors":"Y. Zhang , H. Bousack , M. Bick , A. Montsch , H. Soltner , W. Wolf , U. Steinhoff , L. Trahms , P. Endt","doi":"10.1016/S0964-1807(99)00032-0","DOIUrl":null,"url":null,"abstract":"<div><p>We have employed HTS rf washer SQUIDs with coplanar resonators for magnetocardiography measurements. The white field noise of such a magnetometer (rf washer SQUID, 3.5<!--> <!-->mm in diameter, flip-chip mounted on a flux concentrator 13<!--> <!-->mm in diameter) inside a 4 layer <em>μ</em>-metal shielding was 16 fT/√Hz. MCG measurements were performed with a magnetometer in the Berlin magnetically shielded room (BMSR) and with a first order gradiometer in a standard shielded room in Jülich (JMSR). The results are compared regarding the fragmentation score, which is supposed to be a risk marker for sudden cardiac death. Despite different environments, score values determined with the magnetometer and the gradiometer were almost identical.</p></div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 10","pages":"Pages 705-710"},"PeriodicalIF":0.0000,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(99)00032-0","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Superconductivity","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0964180799000320","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
We have employed HTS rf washer SQUIDs with coplanar resonators for magnetocardiography measurements. The white field noise of such a magnetometer (rf washer SQUID, 3.5 mm in diameter, flip-chip mounted on a flux concentrator 13 mm in diameter) inside a 4 layer μ-metal shielding was 16 fT/√Hz. MCG measurements were performed with a magnetometer in the Berlin magnetically shielded room (BMSR) and with a first order gradiometer in a standard shielded room in Jülich (JMSR). The results are compared regarding the fragmentation score, which is supposed to be a risk marker for sudden cardiac death. Despite different environments, score values determined with the magnetometer and the gradiometer were almost identical.
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