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Superconducting radiofrequency probe...

Duke University., Biomedical Engineering.

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Superconducting radiofrequency probes for magnetic resonance microscopy, simulation and experiments.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Superconducting radiofrequency probes for magnetic resonance microscopy, simulation and experiments./
作者:	Nouls, John C.
面頁冊數:	153 p.
附註:	Adviser: G. Allan Johnson.
Contained By:	Dissertation Abstracts International70-03B.
標題:	Engineering, Biomedical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3349844
ISBN:	9781109061406

Superconducting radiofrequency probes for magnetic resonance microscopy, simulation and experiments.
Nouls, John C.

Superconducting radiofrequency probes for magnetic resonance microscopy, simulation and experiments. - 153 p.

Adviser: G. Allan Johnson.

Thesis (Ph.D.)--Duke University, 2009.

In magnetic resonance microscopy, insufficient signal-to-noise ratio currently limits imaging performance. Superconducting probes can potentially increase the sensitivity of the magnetic resonance experiment. However, many superconducting probes failed to entirely deliver the expected increase in signal-to-noise ratio.

ISBN: 9781109061406Subjects--Topical Terms:

1017684
Engineering, Biomedical.

Superconducting radiofrequency probes for magnetic resonance microscopy, simulation and experiments.
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100 1 $a Nouls, John C. $3 1064542
245 1 0 $a Superconducting radiofrequency probes for magnetic resonance microscopy, simulation and experiments.
300 $a 153 p.
500 $a Adviser: G. Allan Johnson.
500 $a Source: Dissertation Abstracts International, Volume: 70-03, Section: B, page: 1793.
502 $a Thesis (Ph.D.)--Duke University, 2009.
520 $a In magnetic resonance microscopy, insufficient signal-to-noise ratio currently limits imaging performance. Superconducting probes can potentially increase the sensitivity of the magnetic resonance experiment. However, many superconducting probes failed to entirely deliver the expected increase in signal-to-noise ratio.
520 $a We present a method based on finite-element radiofrequency simulations. The radiofrequency model computes several figures of merit of a probe, namely: (i) the resonant frequency, (ii) the impedance, (iii) the magnetic field homogeneity, (iv) the filling factor, and (v) the sensitivity. The probe is constituted by several components. The method identifies the component limiting the sensitivity of the probe. Subsequently, the probe design can be improved iteratively.
520 $a We show that the sensitivity of an existing superconducting Helmholtz pair can be improved by increasing the filling factor and cooling the radiofrequency shield, which was implemented in the design of a new superconducting probe. The second probe exhibits a sensitivity three times as high, leading to improved imaging performance.
590 $a School code: 0066.
650 4 $a Engineering, Biomedical. $3 1017684
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773 0 $t Dissertation Abstracts International $g 70-03B.
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790 1 0 $a Enterline, David $e committee member
790 1 0 $a Johnson, G. Allan, $e advisor
790 1 0 $a Liu, Qing $e committee member
790 1 0 $a MacFall, James $e committee member
790 1 0 $a Trahey, Gregg $e committee member
790 1 0 $a Wolf, Patrick $e committee member
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3349844