{"title":"随机光谱成像","authors":"J Jansen, B Blümich","doi":"10.1016/0022-2364(92)90207-N","DOIUrl":null,"url":null,"abstract":"<div><p>Noise excitation in imaging provides a significant RF power advantage over pulse excitation. Therefore it is of particular interest for the imaging of large objects in biomedicine and materials science. The theory of stochastic back-projection imaging with constant gradients is described, details of the experimental procedures are given, and results on small phantoms with and without spectroscopic resolution are presented. For imaging with RF coils of 3 cm in diameter, the excitation power was 0.1 W, corresponding to a reduction in RF power by a factor of 10<sup>3</sup> in comparison with 90° pulse excitation.</p></div>","PeriodicalId":100800,"journal":{"name":"Journal of Magnetic Resonance (1969)","volume":"99 3","pages":"Pages 525-532"},"PeriodicalIF":0.0000,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-2364(92)90207-N","citationCount":"7","resultStr":"{\"title\":\"Stochastic spectroscopic imaging\",\"authors\":\"J Jansen, B Blümich\",\"doi\":\"10.1016/0022-2364(92)90207-N\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Noise excitation in imaging provides a significant RF power advantage over pulse excitation. Therefore it is of particular interest for the imaging of large objects in biomedicine and materials science. The theory of stochastic back-projection imaging with constant gradients is described, details of the experimental procedures are given, and results on small phantoms with and without spectroscopic resolution are presented. For imaging with RF coils of 3 cm in diameter, the excitation power was 0.1 W, corresponding to a reduction in RF power by a factor of 10<sup>3</sup> in comparison with 90° pulse excitation.</p></div>\",\"PeriodicalId\":100800,\"journal\":{\"name\":\"Journal of Magnetic Resonance (1969)\",\"volume\":\"99 3\",\"pages\":\"Pages 525-532\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1992-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0022-2364(92)90207-N\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Magnetic Resonance (1969)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/002223649290207N\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnetic Resonance (1969)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/002223649290207N","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Noise excitation in imaging provides a significant RF power advantage over pulse excitation. Therefore it is of particular interest for the imaging of large objects in biomedicine and materials science. The theory of stochastic back-projection imaging with constant gradients is described, details of the experimental procedures are given, and results on small phantoms with and without spectroscopic resolution are presented. For imaging with RF coils of 3 cm in diameter, the excitation power was 0.1 W, corresponding to a reduction in RF power by a factor of 103 in comparison with 90° pulse excitation.
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