{"title":"Electrothermal modeling of PIN diode protection circuits in MRI surface coils","authors":"R. Caverly","doi":"10.1109/RWS.2014.6830133","DOIUrl":null,"url":null,"abstract":"A study of the temperature rise in MRI coil PIN diode protection circuits is presented. The study is based on a previously defined electrothermal model for the PIN diode that is applied to MR surface coils. The model shows a rapid rise in the PIN diode temperature with application of the MR transmit pulse and for low duty cycle MR pulse sequences, the diode cools significantly during the off-phase of the MR transmit pulse. For commercial surface coil protection diodes, a continuous temperature above approximately 125 °C will result in diode destruction, and this new electrothermal model allows MR coil designers the ability to predict temperature effects as part of the full design of the coil.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"223 3","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 IEEE Radio and Wireless Symposium (RWS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RWS.2014.6830133","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
A study of the temperature rise in MRI coil PIN diode protection circuits is presented. The study is based on a previously defined electrothermal model for the PIN diode that is applied to MR surface coils. The model shows a rapid rise in the PIN diode temperature with application of the MR transmit pulse and for low duty cycle MR pulse sequences, the diode cools significantly during the off-phase of the MR transmit pulse. For commercial surface coil protection diodes, a continuous temperature above approximately 125 °C will result in diode destruction, and this new electrothermal model allows MR coil designers the ability to predict temperature effects as part of the full design of the coil.
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