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dc.contributor.authorBrunner, David O.-
dc.contributor.authorFurrer, Lukas-
dc.contributor.authorWeiger, Markus-
dc.contributor.authorBaumberger, Werner-
dc.contributor.authorSchmid, Thomas-
dc.contributor.authorReber, Jonas-
dc.contributor.authorDietrich, Benjamin E.-
dc.contributor.authorWilm, Bertram J.-
dc.contributor.authorFroidevaux, Romain-
dc.contributor.authorPruessmann, Klaas P.-
dc.date.accessioned2019-02-11T14:21:34Z-
dc.date.available2019-02-11T14:21:34Z-
dc.date.issued2016-
dc.identifier.issn1090-7807de_CH
dc.identifier.issn1096-0856de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/15251-
dc.description.abstractFor direct NMR detection and imaging of compounds with very short coherence life times the dead time between radio-frequency (RF) pulse and reception of the free induction decay (FID) is a major limiting factor. It is typically dominated by the transient and recovery times of currently available transmit-receive (T/R) switches and amplification chains. A novel PIN diode-based T/R switch topology is introduced allowing for fast switching by high bias transient currents but nevertheless producing a very low video leakage signal and insertion loss (0.5dB). The low transient spike level in conjunction with the high isolation (75dB) prevent saturation of the preamplifier entirely which consequently does not require time for recovery. Switching between transmission and reception is demonstrated within less than 1μs in bench tests as well as in acquisitions of FIDs and zero echo time (ZTE) images with bandwidths up to 500kHz at 7T. Thereby the 2kW switch exhibited a rise-time of 350ns (10-99%) producing however a total video leakage of below 20mV peak-to-peak and less than -89dBm in-band. The achieved switching time renders the RF pulse itself the dominant contribution to the dead time in which a coherence cannot be observed, thus making pulsed NMR experiments almost time-optimal even for compounds with very short signal life times.de_CH
dc.language.isoende_CH
dc.publisherElsevierde_CH
dc.relation.ispartofJournal of Magnetic Resonancede_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectDead time reductionde_CH
dc.subjectShortde_CH
dc.subjectTR switchingde_CH
dc.subjectZero echo time imagingde_CH
dc.subject.ddc530: Physikde_CH
dc.titleSymmetrically biased T/R switches for NMR and MRI with microsecond dead timede_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Signal Processing and Wireless Communications (ISC)de_CH
dc.identifier.doi10.1016/j.jmr.2015.12.016de_CH
dc.identifier.pmid26796113de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.end155de_CH
zhaw.pages.start147de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume263de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
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Brunner, D. O., Furrer, L., Weiger, M., Baumberger, W., Schmid, T., Reber, J., Dietrich, B. E., Wilm, B. J., Froidevaux, R., & Pruessmann, K. P. (2016). Symmetrically biased T/R switches for NMR and MRI with microsecond dead time. Journal of Magnetic Resonance, 263, 147–155. https://doi.org/10.1016/j.jmr.2015.12.016
Brunner, D.O. et al. (2016) ‘Symmetrically biased T/R switches for NMR and MRI with microsecond dead time’, Journal of Magnetic Resonance, 263, pp. 147–155. Available at: https://doi.org/10.1016/j.jmr.2015.12.016.
D. O. Brunner et al., “Symmetrically biased T/R switches for NMR and MRI with microsecond dead time,” Journal of Magnetic Resonance, vol. 263, pp. 147–155, 2016, doi: 10.1016/j.jmr.2015.12.016.
BRUNNER, David O., Lukas FURRER, Markus WEIGER, Werner BAUMBERGER, Thomas SCHMID, Jonas REBER, Benjamin E. DIETRICH, Bertram J. WILM, Romain FROIDEVAUX und Klaas P. PRUESSMANN, 2016. Symmetrically biased T/R switches for NMR and MRI with microsecond dead time. Journal of Magnetic Resonance. 2016. Bd. 263, S. 147–155. DOI 10.1016/j.jmr.2015.12.016
Brunner, David O., Lukas Furrer, Markus Weiger, Werner Baumberger, Thomas Schmid, Jonas Reber, Benjamin E. Dietrich, Bertram J. Wilm, Romain Froidevaux, and Klaas P. Pruessmann. 2016. “Symmetrically Biased T/R Switches for NMR and MRI with Microsecond Dead Time.” Journal of Magnetic Resonance 263: 147–55. https://doi.org/10.1016/j.jmr.2015.12.016.
Brunner, David O., et al. “Symmetrically Biased T/R Switches for NMR and MRI with Microsecond Dead Time.” Journal of Magnetic Resonance, vol. 263, 2016, pp. 147–55, https://doi.org/10.1016/j.jmr.2015.12.016.


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